/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Vladimir Piskarev <pisv@1c.ru> - AIOOB in JavaElementDelta.addAffectedChild - https://bugs.eclipse.org/455882
 *     Vladimir Piskarev <pisv@1c.ru> - F_CONTENT sometimes lost when merging deltas - https://bugs.eclipse.org/520336
 *******************************************************************************/
package org.eclipse.jdt.core.tests.model;

import java.io.IOException;

import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.*;
import org.eclipse.jdt.internal.core.*;

import junit.framework.Test;

/**
 * These test ensure that modifications in Java projects are correctly reported as
 * IJavaElementDeltas.
 */
public class JavaElementDeltaTests extends ModifyingResourceTests {

public static Test suite() {
	return buildModelTestSuite(JavaElementDeltaTests.class, ALPHABETICAL_SORT/*some tests may fail if run in a random order*/);
}

// Use this static initializer to specify subset for tests
// All specified tests which do not belong to the class are skipped...
static {
//	TESTS_PREFIX =  "testBug100772_ProjectScope";
//	TESTS_NAMES = new String[] { "testAddInvalidSubfolder" };
//	TESTS_NUMBERS = new int[] { 100772 };
//	TESTS_RANGE = new int[] { 83304, -1 };
}

public JavaElementDeltaTests(String name) {
	super(name);
}
/**
 * Ensures that adding a comment to a working copy and commiting it triggers an empty fine grained
 * delta with the kind set for POST_CHANGE listeners.
 * (regression test for bug 32937 Kind not set for empty fine-grained delta)
 */
public void testAddCommentAndCommit() throws CoreException {
	DeltaListener listener = new DeltaListener(ElementChangedEvent.POST_CHANGE);
	ICompilationUnit copy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFile("P/X.java",
			"public class X {\n" +
			"}");
		ICompilationUnit unit = getCompilationUnit("P", "", "", "X.java");
		copy = unit.getWorkingCopy(null);

		// add comment to working copy
		copy.getBuffer().setContents(
			"public class X {\n" +
			"  // some comment\n" +
			"}");

		// commit working copy
		JavaCore.addElementChangedListener(listener, ElementChangedEvent.POST_CHANGE);
		copy.commitWorkingCopy(true, null);
		assertEquals(
			"Unexpected delta after committing working copy",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[*]: {CONTENT | FINE GRAINED | PRIMARY RESOURCE}",
			listener.toString());
	} finally {
		JavaCore.removeElementChangedListener(listener);
		if (copy != null) copy.discardWorkingCopy();
		deleteProject("P");
	}
}

/*
 * Add cu in default package test (proj=src=bin).
 */
public void testAddCuInDefaultPkg1() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		createFile("P/X.java",
			"public class X {\n" +
			"}");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Add cu in default package test (proj!=src!=bin).
 */
public void testAddCuInDefaultPkg2() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src"}, "bin");
		createFile("P/src/X.java",
			"public class X {\n" +
			"}");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Add cu after opening its project
 * (regression test for 56870 copied file not shown in package explorer / java browser [ccp])
 */
public void testAddCuAfterProjectOpen() throws CoreException {
	try {
		IJavaProject p1 = createJavaProject("P1", new String[] {"src"}, "bin");
		IJavaProject p2 = createJavaProject("P2", new String[] {"src"}, "bin");
		createFile("P2/src/X.java",
			"public class X {\n" +
			"}");
		IProject project = p2.getProject();
		project.close(null);

		// invalidate roots
		p1.setRawClasspath(new IClasspathEntry[] {}, null);

		// open project
		project.open(null);

		startDeltas();
		createFile("P2/src/Y.java",
			"public class Y {\n" +
			"}");
		assertDeltas(
			"Unexpected delta",
			"P2[*]: {CHILDREN}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			Y.java[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
	}
}
/*
 * Add the .classpath file to a Java project that was missing it.
 * (regression test for bug 26128 packages don't appear in package explorer view)
 */
public void testAddDotClasspathFile() throws CoreException {
	try {
		createProject("P");
		createFolder("/P/src");

		// add Java nature
		editFile(
			"/P/.project",
			"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
			"<projectDescription>\n" +
			"	<name>Test</name>\n" +
			"	<comment></comment>\n" +
			"	<projects>\n" +
			"	</projects>\n" +
			"	<buildSpec>\n" +
			"		<buildCommand>\n" +
			"			<name>org.eclipse.jdt.core.javabuilder</name>\n" +
			"			<arguments>\n" +
			"			</arguments>\n" +
			"		</buildCommand>\n" +
			"	</buildSpec>\n" +
			"	<natures>\n" +
			"		<nature>org.eclipse.jdt.core.javanature</nature>\n" +
			"	</natures>\n" +
			"</projectDescription>"
		);

		startDeltas();
		createFile(
			"P/.classpath",
			"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
			"<classpath>\n" +
			"    <classpathentry kind=\"src\" path=\"src\"/>\n" +
			"    <classpathentry kind=\"output\" path=\"bin\"/>\n" +
			"</classpath>"
		);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	src[*]: {ADDED TO CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[+]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that adding a library entry for an existing external library folder triggers the correct delta
 */
public void _testAddExternalLibFolder1() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P");
		createExternalFolder("externalLib");
		refresh(p);
		startDeltas();
		setClasspath(p, new IClasspathEntry[] {JavaCore.newLibraryEntry(new Path(getExternalResourcePath("externalLib")), null, null)});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {ADDED TO CLASSPATH}\n" +
			"	"+ getExternalJCLPathString() + "[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that adding a library entry for a non-existing external library folder triggers the correct delta
 */
public void _testAddExternalLibFolder2() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P");
		refresh(p);
		IPath path = new Path(getExternalResourcePath("externalLib"));
		startDeltas();
		setClasspath(p, new IClasspathEntry[] {JavaCore.newLibraryEntry(path, null, null)});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	"+ getExternalJCLPathString() + "[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that creating an external library folder referenced by a library entry and refreshing triggers the correct delta
 */
public void testAddExternalLibFolder3() throws CoreException {
	try {
		IJavaProject p =createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		refresh(p);
		startDeltas();
		createExternalFolder("externalLib");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that creating an external library folder referenced by a library entry and refreshing after a restart triggers the correct delta
 */
public void testAddExternalLibFolder4() throws CoreException {
	try {
		simulateExitRestart();
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		createExternalFolder("externalLib");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that adding a library entry for an existing external ZIP archive triggers the correct delta
 */
public void testAddZIPArchive1() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P");
		refreshExternalArchives(p);
		createExternalFile("externalLib.abc", "");

		startDeltas();
		setClasspath(p, new IClasspathEntry[] {JavaCore.newLibraryEntry(new Path(getExternalResourcePath("externalLib.abc")), null, null)});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	"+ getExternalPath() + "externalLib.abc[+]: {}\n" +
			"	"+ getExternalJCLPathString() + "[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib.abc");
		deleteProject("P");
	}
}

/*
 * Ensures that adding a library entry for a non-existing external ZIP archive triggers the correct delta
 */
public void testAddZIPArchive2() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P");
		refreshExternalArchives(p);

		startDeltas();
		setClasspath(p, new IClasspathEntry[] {JavaCore.newLibraryEntry(new Path(getExternalResourcePath("externalLib.abc")), null, null)});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	"+ getExternalJCLPathString() + "[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that creating an external ZIP archive referenced by a library entry and refreshing triggers the correct delta
 */
public void testAddZIPArchive3() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib.abc")}, "");
		refreshExternalArchives(p);

		startDeltas();
		createExternalFile("externalLib.abc", "");
		refreshExternalArchives(p);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib.abc[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib.abc");
		deleteProject("P");
	}
}

/*
 * Ensures that creating an external ZIP archive referenced by a library entry and refreshing after a restart triggers the correct delta
 */
public void testAddZIPArchive4() throws CoreException {
	try {
		simulateExitRestart();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib.abc")}, "");
		refreshExternalArchives(p);

		startDeltas();
		createExternalFile("externalLib.abc", "");
		refreshExternalArchives(p);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib.abc[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib.abc");
		deleteProject("P");
	}
}

/*
 * Ensures that adding a library entry for an existing internal ZIP archive triggers the correct delta
 */
public void testAddZIPArchive5() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P");
		createFile("/P/internalLib.abc", "");

		startDeltas();
		setClasspath(p, new IClasspathEntry[] {JavaCore.newLibraryEntry(new Path("/P/internalLib.abc"), null, null)});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	internalLib.abc[*]: {ADDED TO CLASSPATH}\n" +
			"	"+ getExternalJCLPathString() + "[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensure that a resource delta is fired when a file is added to a non-java project.
 * (regression test for bug 18698 Seeing non-java projects in package view)
 */
public void testAddFileToNonJavaProject() throws CoreException {
	try {
		createProject("P");
		startDeltas();
		createFile("/P/toto.txt", "");
		assertDeltas(
			"Unexpected delta",
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensure that the correct delta is sent when a file is added to a non-Java resource folder
 * which is also on the build path of another project.
 * (regression test for bug 207441 Wrong delta for files created in folders that are on a java project as classes folder)
 */
public void testAddFileToSharedNonJavaResource() throws CoreException {
	try {
		createJavaProject("A", new String[0], "bin");
		createFolder("/A/resources");
		createJavaProject("B", new String[0], new String[] {"/A/resources"}, "bin");
		startDeltas();
		createFile("/A/resources/test", "");
		assertDeltas(
			"Unexpected delta",
			"A[*]: {CONTENT}\n" +
			"	ResourceDelta(/A/resources)[*]\n" +
			"B[*]: {CHILDREN}\n" +
			"	/A/resources[*]: {CONTENT}\n" +
			"		ResourceDelta(/A/resources/test)[+]"
		);
	} finally {
		stopDeltas();
		deleteProjects(new String[] {"A", "B"});
	}
}

/*
 * Ensure that adding a folder in a non-Java folder (i.e. a folder with an invalid package name) reports the correct delta
 * (regression test for bug 130982 META-INF directories shown as empty META-INF.* packages in J2EE Navigator)
 */
public void testAddFolderInNonJavaFolder() throws CoreException {
	try {
		createJavaProject("P");
		createFolder("/P/META-INF");
		startDeltas();
		createFolder("/P/META-INF/folder");
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CONTENT}\n" +
			"	ResourceDelta(/P/META-INF)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensure that a resource delta is fired when a .name folder is added to a java project where prj=src.
 * (regression test for bug 31383 Strange rendering of of link resources when link points to Eclipse workspace)
 */
public void testAddInvalidSubfolder() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P");
		createFolder("/P/p/.folder");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		p[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Add the java nature to an existing project.
 */
public void testAddJavaNature() throws CoreException {
	try {
		createProject("P");
		startDeltas();
		addJavaNature("P");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that adding a folder and a jar file (on the classpath) in this folder
 * inside an IWorkspaceRunnable reports the correct delta
 * (the folder and jar file being in a source folder)
 * (regression test for bug 177819 Jar files added to a plugin are ignored)
 */
public void testAddJarAndFolderInSource() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, new String[] {"/P/lib-1/test.jar"}, "");

		ResourcesPlugin.getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					createFolder("/P/lib-1");
					createFile("/P/lib-1/test.jar", "");
				}
			},
			null
		);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT}\n" +
			"	lib-1/test.jar[+]: {}\n" +
			"	ResourceDelta(/P/lib-1)[+]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Add the java nature to an existing project and set the classpath in an IWorkspaceRunnable.
 * Ensures that adding a non-java resource reports the correct delta.
 * (regression test for bug 44066 Package Explorer doesn't show new file)
 */
public void testAddJavaNatureAndClasspath() throws CoreException {
	try {
		createProject("P");
		ResourcesPlugin.getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					addJavaNature("P");
					createFolder("/P/src");
					getJavaProject("P").setRawClasspath(
						new IClasspathEntry[] {JavaCore.newSourceEntry(new Path("/P/src"))},
						new Path("/P/bin"),
						null
					);
				}
			},
			null
		);
		startDeltas();
		createFile("/P/src/file.txt", "");
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CONTENT}\n" +
			"		ResourceDelta(/P/src/file.txt)[+]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Add a java project.
 */
public void testAddJavaProject() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Add a non-java project.
 */
public void testAddNonJavaProject() throws CoreException {
	try {
		startDeltas();
		createProject("P");
		assertDeltas(
			"Should get a non-Java resource delta",
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
public void testAddPackageSourceIsBin() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src"}, "src");
		createFolder("P/src/x");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		x[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Add 2 java projects in an IWorkspaceRunnable.
 */
public void testAddTwoJavaProjects() throws CoreException {
	try {
		startDeltas();
		ResourcesPlugin.getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					createJavaProject("P1", new String[] {""}, "");
					createJavaProject("P2", new String[] {"src"}, "bin");
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P1[+]: {}\n" +
			"P2[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
	}
}

/*
 * Add 2 java projects in an IWorkspaceRunnable.
 */
public void testAddTwoJavaProjectsWithExtraSetClasspath() throws CoreException {
	try {
		startDeltas();
		ResourcesPlugin.getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					IJavaProject p1 = createJavaProject("P1", new String[] {""}, "");
					// should be a no-op and no extra delta volley should be fired
					p1.setRawClasspath(p1.getRawClasspath(), p1.getOutputLocation(), null);
					createJavaProject("P2", new String[] {"src"}, "bin");
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P1[+]: {}\n" +
			"P2[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
	}
}
/*
 * Batch operation test.
 */
public void testBatchOperation() throws CoreException {
	try {
		createJavaProject("P", new String[] {"src"}, "bin");
		createFolder("P/src/x");
		createFile(
			"P/src/x/A.java",
			"package x;\n" +
			"public class A {\n" +
			"}");
		startDeltas();
		JavaCore.run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					ICompilationUnit unit = getCompilationUnit("P/src/x/A.java");
					unit.createType("class B {}", null, false, monitor);
					unit.getType("A").createField("int i;", null, false, monitor);
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		x[*]: {CHILDREN}\n" +
			"			A.java[*]: {CHILDREN | FINE GRAINED | PRIMARY RESOURCE}\n" +
			"				A[*]: {CHILDREN | FINE GRAINED}\n" +
			"					i[+]: {}\n" +
			"				B[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensures that if a project's output folder is used as a lib folder in another project, building
 * the first project results in the correct delta in the other project.
 */
public void testBuildProjectUsedAsLib() throws CoreException {
	try {
		IJavaProject p1 = createJavaProject("P1", new String[] {"src1"}, new String[] {"JCL_LIB"}, "bin1");
		createJavaProject("P2", new String[] {"src2"}, new String[] {"/P1/bin1"}, "bin2");
		createFile(
			"/P1/src1/X.java",
			"public class X {\n" +
			"}"
		);

		// force opening of project to avoid external jar delta
		p1.open(null);

		startDeltas();

		// full build
		p1.getProject().build(IncrementalProjectBuilder.FULL_BUILD, null);
		waitForAutoBuild();
		assertDeltas(
			"Unexpected delta (1)",
			"P2[*]: {CHILDREN}\n" +
			"	/P1/bin1[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.class[+]: {}"
			);

		editFile(
			"/P1/src1/X.java",
			"public class X {\n" +
			"  void foo() {}\n" +
			"}\n" +
			"class Y {\n" +
			"}"
		);
		clearDeltas();

		// incremental buid
		p1.getProject().build(IncrementalProjectBuilder.INCREMENTAL_BUILD, null);
		waitForAutoBuild();
		assertDeltas(
			"Unexpected delta (2)",
			"P2[*]: {CHILDREN}\n" +
			"	/P1/bin1[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.class[*]: {CONTENT}\n" +
			"			Y.class[+]: {}"
			);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
	}
}

/**
 * Ensures that changing the custom output folder of a source entry
 * triggers a F_REMOVED_FROM_CLASSPATH and F_ADDED_TO_CLASSPATH delta.
 */
public void testChangeCustomOutput() throws CoreException {
	try {
		startDeltas();
		IJavaProject proj = createJavaProject("P", new String[] {"src"}, "bin", new String[] {"bin1"});
		setClasspath(
			proj,
			new IClasspathEntry[] {
				JavaCore.newSourceEntry(new Path("/P/src"), new IPath[0], new Path("/P/bin2"))
			});
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	src[*]: {ADDED TO CLASSPATH | REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that the setting the classpath where the only change is the export flag
 * triggers a F_CLASSPATH CHANGED delta.
 * (regression test for bug 75517 No classpath delta for project becoming exported)
 */
public void testChangeExportFlag() throws CoreException {
	try {
		createJavaProject("P1");
		IJavaProject proj = createJavaProject("P2", new String[] {}, new String[] {}, new String[] {"/P1"}, new boolean[] {false}, "bin");
		startDeltas();
		setClasspath(
			proj,
			new IClasspathEntry[] {
				JavaCore.newProjectEntry(new Path("/P1"), true)
			});
		assertDeltas(
			"Unexpected delta",
			"P2[*]: {CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	ResourceDelta(/P2/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
	}
}

/*
 * Ensures that changing an external library folder referenced by a library entry and refreshing triggers the correct delta
 */
public void testChangeExternalLibFolder1() throws CoreException {
	try {
		createExternalFolder("externalLib");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		createExternalFolder("externalLib/p");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {CHILDREN}\n" +
			"		p[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that changing an external library folder referenced by a library entry and refreshing triggers the correct delta
 */
public void testChangeExternalLibFolder2() throws CoreException {
	try {
		createExternalFolder("externalLib/p");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		createExternalFile("externalLib/p/X.class", "");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {CHILDREN}\n" +
			"		p[*]: {CHILDREN}\n" +
			"			X.class[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that changing an external library folder referenced by a library entry and refreshing triggers the correct delta
 * Disable as long as it is not more reliable see https://bugs.eclipse.org/bugs/show_bug.cgi?id=295619
 */
public void testChangeExternalLibFolder3() throws CoreException {
	try {
		createExternalFolder("externalLib/p");
		createExternalFile("externalLib/p/X.class", "");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		touch(getExternalFile("externalLib/p/X.class"));
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {CHILDREN}\n" +
			"		p[*]: {CHILDREN}\n" +
			"			X.class[*]: {CONTENT}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that changing an external library folder referenced by a library entry and refreshing triggers the correct delta
 */
public void testChangeExternalLibFolder4() throws CoreException {
	try {
		createExternalFolder("externalLib");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		createExternalFile("externalLib/test.txt", "test");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {CONTENT}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that changing an external library folder referenced by a library entry and refreshing triggers the correct delta
 */
public void testChangeExternalLibFolder5() throws CoreException {
	try {
		createExternalFolder("externalLib/p");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		createExternalFile("externalLib/p/test.txt", "test");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {CHILDREN}\n" +
			"		p[*]: {CONTENT}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

public void testChangeJRE9_8() throws CoreException, IOException {
	if (!isJRE9) return;
	try {
		// create project P8, just to ensure that JCL18_LIB is properly configured.
		createJavaProject("P8", new String[] {"src"}, new String[] {"JCL18_LIB"}, "bin", "1.8");

		IJavaProject p = createJava9Project("P");

		StringBuilder expectedDelta = new StringBuilder();
		expectedDelta.append("P[*]: {CHILDREN | CONTENT | RESOLVED CLASSPATH CHANGED}\n");
		expectedDelta.append('\t').append(getExternalJCLPathString("1.8")).append("[*]: {ADDED TO CLASSPATH}\n"); // the addition
		// for stable test construct expectation from actual list of contained modules (before modification):
		for (IPackageFragmentRoot root : p.getPackageFragmentRoots()) {
			if (root instanceof JrtPackageFragmentRoot)
				expectedDelta.append("	<module:"+root.getElementName()+">[*]: {REMOVED FROM CLASSPATH}\n");
		}
		expectedDelta.append("	ResourceDelta(/P/.classpath)[*]");

		// replace JRE System Library (9 -> 8):
		startDeltas();
		IClasspathEntry[] rawClasspath = p.getRawClasspath();
		for (int i = 0; i < rawClasspath.length; i++) {
			IClasspathEntry entry = rawClasspath[i];
			if (entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) {
				rawClasspath[i] = JavaCore.newVariableEntry(new Path("JCL18_LIB"), new Path("JCL18_SRC"), null, null, null, false);
				break;
			}
		}
		p.setRawClasspath(rawClasspath, null);
		refresh(p);

		assertDeltasSortingModules(
			"Unexpected delta",
			expectedDelta.toString(),
			true);
	} finally {
		stopDeltas();
		deleteProject("P");
		deleteProject("P8");
	}
}

public void testChangeJRE8_9() throws CoreException, IOException {
	if (!isJRE9) return;
	try {
		// replace JRE System Library (8 - 9):
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[] {"src"}, new String[] {"JCL18_LIB"}, "bin", "1.8");
		waitUntilIndexesReady();

		setUpJCLClasspathVariables("9", false);
		IClasspathEntry[] rawClasspath = p.getRawClasspath();
		for (int i = 0; i < rawClasspath.length; i++) {
			IClasspathEntry entry = rawClasspath[i];
			if (entry.getEntryKind() == IClasspathEntry.CPE_VARIABLE) {
				rawClasspath[i] = JavaCore.newVariableEntry(new Path("JCL19_LIB"), new Path("JCL19_SRC"), null, null, null, false);
				break;
			}
		}
		p.setRawClasspath(rawClasspath, null);
		refresh(p);

		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT | RESOLVED CLASSPATH CHANGED}\n" +
			"	"+ getExternalPath() + "jclMin1.8.jar[*]: {REMOVED FROM CLASSPATH}\n" +
			"	"+ getExternalPath() + "jclMin9.jar[+]: {}\n" +
			"	ResourceDelta(/P/.classpath)[*]",
			true);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensures that changing an external ZIP archive referenced by a library entry and refreshing triggers the correct delta
 */
public void testChangeZIPArchive1() throws CoreException {
	try {
		createExternalFile("externalLib.abc", "");
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib.abc")}, "");
		refreshExternalArchives(p);

		startDeltas();
		touch(getExternalFile("externalLib.abc"));
		refreshExternalArchives(p);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib.abc[*]: {CONTENT | ARCHIVE CONTENT CHANGED}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib.abc");
		deleteProject("P");
	}
}

/*
 * Ensures that changing an internal ZIP archive referenced by a library entry triggers the correct delta
 */
public void testChangeZIPArchive2() throws CoreException {
	try {
		createJavaProject("P", new String[0], new String[] {"/P/internalLib.abc"}, "");
		createFile("/P/internalLib.abc", "");

		startDeltas();
		editFile("/P/internalLib.abc", "");
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	internalLib.abc[*]: {CONTENT | ARCHIVE CONTENT CHANGED}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that changing an external source folder referenced by a library entry as source attachment and refreshing triggers the correct delta
 */
public void testChangeExternalSourceAttachment() throws CoreException {
	try {
		createExternalFolder("externalLib");
		createExternalFolder("externalSrc");
		IJavaProject project = createJavaProject("P");
		addLibraryEntry(project, getExternalResourcePath("externalLib"), getExternalResourcePath("externalSrc"));
		startDeltas();
		createExternalFile("externalSrc/X.java", "public class X {}");
		refresh(project);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {SOURCE ATTACHED | SOURCE DETACHED}"
			);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteExternalResource("externalSrc");
		deleteProject("P");
	}
}

/**
 * Ensures that the setting the classpath with a library entry
 * triggers a F_REMOVED_FROM_CLASSPATH and F_ADDED_TO_CLASSPATH delta.
 */
public void testChangeRootKind() throws CoreException {
	try {
		startDeltas();
		IJavaProject proj = createJavaProject("P", new String[] {"src"}, "bin");
		setClasspath(
			proj,
			new IClasspathEntry[] {
				JavaCore.newLibraryEntry(new Path("/P/src"), null, null, false)
			});
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	src[*]: {ADDED TO CLASSPATH | REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Close a java project.
 */
public void testCloseJavaProject() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		IProject project = getProject("P");
		project.close(null);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CLOSED}\n" +
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Close a non-java project.
 */
public void testCloseNonJavaProject() throws CoreException {
	try {
		createProject("P");
		startDeltas();
		IProject project = getProject("P");
		project.close(null);
		assertDeltas(
			"Unexpected delta",
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Closing a non-java project that contains a jar referenced in another project should produce
 * a delta on this other project.
 * (regression test for bug 19058 Closing non-java project doesn't remove root from java project)
 */
public void testCloseNonJavaProjectUpdateDependent() throws CoreException {
	try {
		createProject("SP");
		createFile("/SP/x.jar", "");
		createJavaProject("JP", new String[] {""}, new String[] {"/SP/x.jar"}, "");
		IProject project = getProject("SP");
		startDeltas();
		project.close(null);
		assertDeltas(
			"Unexpected delta",
			"JP[*]: {CHILDREN}\n" +
			"	/SP/x.jar[-]: {}\n" +
			"ResourceDelta(/SP)"
		);
	} finally {
		stopDeltas();
		deleteProject("SP");
		deleteProject("JP");
	}
}
/**
 * Test that deltas are generated when a compilation unit is added
 * and removed from a package via core API.
 */
public void testCompilationUnitRemoveAndAdd() throws CoreException {
	try {
		createJavaProject("P");
		createFolder("/P/p");
		IFile file = createFile(
			"/P/p/X.java",
			"package p;\n" +
			"public class X {\n" +
			"}"
		);

		// delete cu
		startDeltas();
		deleteResource(file);
		assertDeltas(
			"Unexpected delta after deleting /P/p/X.java",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		p[*]: {CHILDREN}\n" +
			"			X.java[-]: {}"
		);

		// add cu
		clearDeltas();
		createFile(
			"/P/p/X.java",
			"package p;\n" +
			"public class X {\n" +
			"}"
		);
		assertDeltas(
			"Unexpected delta after adding /P/p/X.java",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		p[*]: {CHILDREN}\n" +
			"			X.java[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

public void testCreateSharedWorkingCopy() throws CoreException {
	ICompilationUnit copy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFile("P/X.java",
			"public class X {\n" +
			"}");
		ICompilationUnit unit = getCompilationUnit("P", "", "", "X.java");
		startDeltas();
		copy = unit.getWorkingCopy(new WorkingCopyOwner() {}, null);
		assertWorkingCopyDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			[Working copy] X.java[+]: {}"
		);
	} finally {
		stopDeltas();
		if (copy != null) copy.discardWorkingCopy();
		deleteProject("P");
	}
}
public void testCreateWorkingCopy() throws CoreException {
	ICompilationUnit copy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFile("P/X.java",
			"public class X {\n" +
			"}");
		ICompilationUnit unit = getCompilationUnit("P", "", "", "X.java");
		startDeltas();
		copy = unit.getWorkingCopy(null);
		assertWorkingCopyDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			[Working copy] X.java[+]: {}"
		);
	} finally {
		stopDeltas();
		if (copy != null) copy.discardWorkingCopy();
		deleteProject("P");
	}
}
/*
 * Ensure that the delta is correct if a package is copied on top of an existing
 * package.
 * (regression test for bug 61270 Wrong delta when copying a package that overrides another package)
 */
public void testCopyAndOverwritePackage() throws CoreException {
	try {
		createJavaProject("P", new String[] {"src1", "src2"}, "bin");
		createFolder("/P/src1/p");
		createFile(
			"P/src1/p/X.java",
			"package p;\n" +
			"public class X {\n" +
			"}");
		createFolder("/P/src2/p");
		startDeltas();
		getPackage("/P/src1/p").copy(getPackageFragmentRoot("/P/src2"), null/*no sibling*/, null/*no rename*/, true/*replace*/, null/*no progress*/);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	src2[*]: {CHILDREN}\n" +
			"		p[*]: {CHILDREN}\n" +
			"			X.java[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Test that deltas are generated when a compilation unit not on the classpath is added
 * and removed from a package via core API.
 */
public void testCUNotOnClasspath() throws CoreException {
	try {
		createJavaProject("P", new String[] {}, "bin");
		createFolder("/P/src/p");
		IFile file = createFile(
			"/P/src/p/X.java",
			"package p;\n" +
			"public class X {\n" +
			"}"
		);

		startDeltas();
		deleteResource(file);
		assertDeltas(
			"Unexpected delta after deletion of /P/src/p/X.java",
			"P[*]: {CONTENT}\n" +
			"	ResourceDelta(/P/src)[*]"
		);

		clearDeltas();
		createFile(
			"/P/src/p/X.java",
			"package p;\n" +
			"public class X {\n" +
			"}"
		);
		assertDeltas(
			"Unexpected delta after addition of /P/src/p/X.java",
			"P[*]: {CONTENT}\n" +
			"	ResourceDelta(/P/src)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensure that deleting a jar that is in a folder and that is on the classpath reports
 * a removed  pkg fragment root delta.
 * (regression test for bug 27068 Elements in the Package Explorer are displayed but don't more exist [package explorer])
 *
 */
public void testDeleteInnerJar() throws CoreException {
	try {
		createJavaProject("P", new String[] {"src"}, new String[] {"/P/lib/x.jar"}, "bin");
		createFolder("/P/lib");
		IFile file = createFile("/P/lib/x.jar", "");
		startDeltas();
		deleteResource(file);
		assertDeltas(
			"Unexpected deltas",
			"P[*]: {CHILDREN | CONTENT}\n" +
			"	lib/x.jar[-]: {}\n" +
			"	ResourceDelta(/P/lib)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensure that deleting a non-Java folder that contains a source root folder reports
 * a removed root delta as well as a resource delta for the removed folder.
 * (regression test for bug 24045 Error deleting parent folder of source folder)
 */
public void testDeleteNonJavaFolder() throws CoreException {
	try {
		createJavaProject("P", new String[] {"foo/bar"}, "bin");
		IFolder folder = getFolder("/P/foo");
		startDeltas();
		deleteResource(folder);
		assertDeltas(
			"Unexpected deltas",
			"P[*]: {CHILDREN | CONTENT}\n" +
			"	foo/bar[-]: {}\n" +
			"	ResourceDelta(/P/foo)[-]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensures that changing a project's classpath and deleting it in an IWorkspaceRunnable doesn't throw an NPE
 * (regression test for bug 148015 NPE in log from ClasspathChange)
 */
public void testDeleteProjectAfterChangingClasspath() throws CoreException {
	try {
		final IJavaProject project = createJavaProject("P");
		IWorkspaceRunnable runnable = new IWorkspaceRunnable() {
			public void run(IProgressMonitor monitor) throws CoreException {
				project.setRawClasspath(createClasspath("P", new String[] {"/P/src", ""}), new Path("/P/bin"), monitor);
				deleteProject("P");
			}
		};
		startDeltas();
		getWorkspace().run(runnable, null/*no progress*/);
		assertDeltas(
			"Unexpected delta",
			"P[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensure that deleting a project and setting the classpath on another project
 * in an IWorkspaceRunnable doesn't throw a NullPointerException
 * (regression test for bug 25197 NPE importing external plugins)
 */
public void testDeleteProjectSetCPAnotherProject() throws CoreException {
	final IJavaProject project = createJavaProject("P1", new String[] {"src"}, "bin");
	createJavaProject("P2", new String[] {}, "");

	try {
		startDeltas();
		JavaCore.run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					deleteProject("P2");
					project.setRawClasspath(
						new IClasspathEntry[] {
							JavaCore.newSourceEntry(project.getPath())
						},
						null);
				}
			},
			null);
		assertDeltas(
			"Unexpected deltas",
			"P1[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {ADDED TO CLASSPATH}\n" +
			"	src[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P1/.classpath)[*]\n" +
			"P2[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
	}
}
public void testDiscardWorkingCopy1() throws CoreException { // renamed from testDestroyWorkingCopy
	ICompilationUnit copy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFile("P/X.java",
			"public class X {\n" +
			"}");
		ICompilationUnit unit = getCompilationUnit("P", "", "", "X.java");
		copy = unit.getWorkingCopy(null);
		startDeltas();
		copy.discardWorkingCopy();
		assertWorkingCopyDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			[Working copy] X.java[-]: {}"
		);
	} finally {
		stopDeltas();
		if (copy != null)
			copy.discardWorkingCopy();
		deleteProject("P");
	}
}
public void testDiscardWorkingCopy2() throws CoreException { // renamed from testDestroySharedWorkingCopy
	ICompilationUnit copy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFile("P/X.java",
			"public class X {\n" +
			"}");
		ICompilationUnit unit = getCompilationUnit("P", "", "", "X.java");
		copy = unit.getWorkingCopy(new WorkingCopyOwner() {}, null);
		startDeltas();
		copy.discardWorkingCopy();
		assertWorkingCopyDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			[Working copy] X.java[-]: {}"
		);
	} finally {
		stopDeltas();
		if (copy != null)
			copy.discardWorkingCopy();
		deleteProject("P");
	}
}

/*
 * Ensures that the correct delta is reported when discarding a working copy after a checkpoint()
 * in a batch operation.
 * (regression test for bug 178213 Compilation Unit not shown in Package Explorer after a rename
 */
public void testDiscardWorkingCopy3() throws CoreException {
	ICompilationUnit copy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFile("/P/X.java",
			"public class X {\n" +
			"}");
		ICompilationUnit unit = getCompilationUnit("/P/X.java");
		copy = unit.getWorkingCopy(new WorkingCopyOwner() {}, null);
		startDeltas();
		final ICompilationUnit copyToDiscard = copy;
		JavaCore.run(new IWorkspaceRunnable(){
			public void run(IProgressMonitor monitor) throws CoreException {
				getPackage("/P").createCompilationUnit("Y.java", "public class Y {}", false/*don't force*/, monitor);
				getWorkspace().checkpoint(false/*don't build*/);
				copyToDiscard.discardWorkingCopy();
			}

		}, null/*no progress*/);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			Y.java[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			[Working copy] X.java[-]: {}"
		);
	} finally {
		stopDeltas();
		if (copy != null)
			copy.discardWorkingCopy();
		deleteProject("P");
	}
}
/*
 * Ensures that a delta listener that asks for POST_CHANGE events gets those events
 * and no others.
 */
public void testListenerPostChange() throws CoreException {
	DeltaListener listener = new DeltaListener(ElementChangedEvent.POST_CHANGE);
	ICompilationUnit wc = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		JavaCore.addElementChangedListener(listener, ElementChangedEvent.POST_CHANGE);

		// cu creation
		IPackageFragment pkg = getPackage("P");
		ICompilationUnit cu = pkg.createCompilationUnit(
			"X.java",
			"public class X {\n" +
			"}",
			false,
			null);
		assertEquals(
			"Unexpected delta after creating CU",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[+]: {}",
			listener.toString());
		listener.flush();

		// type creation
		cu.createType(
			"class A {\n" +
			"}",
			cu.getType("X"),
			false,
			null);
		assertEquals(
			"Unexpected delta after creating type",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[*]: {CHILDREN | FINE GRAINED | PRIMARY RESOURCE}\n" +
			"				A[+]: {}",
			listener.toString());
		listener.flush();

		// non-java resource creation
		createFile("P/readme.txt", "");
		assertEquals(
			"Unexpected delta after creating non-java resource",
			"P[*]: {CONTENT}\n" +
			"	ResourceDelta(/P/readme.txt)[+]",
			listener.toString());
		listener.flush();

		// shared working copy creation
		wc = cu.getWorkingCopy(new WorkingCopyOwner() {}, null);
		assertEquals(
			"Unexpected delta after creating shared working copy",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			[Working copy] X.java[+]: {}",
			listener.toString());
		listener.flush();

		// reconcile
		wc.getBuffer().setContents(
			"public class X {\n" +
			"  public void foo() {\n" +
			"  }\n" +
			"}");
		wc.reconcile(ICompilationUnit.NO_AST, false, null, null);
		assertEquals(
			"Unexpected delta after reconciling working copy",
			"",
			listener.toString());
		listener.flush();

		// commit
		wc.commitWorkingCopy(false, null);
		assertEquals(
			"Unexpected delta after committing working copy",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[*]: {CHILDREN | FINE GRAINED | PRIMARY RESOURCE}\n" +
			"				A[-]: {}\n" +
			"				X[*]: {CHILDREN | FINE GRAINED}\n" +
			"					foo()[+]: {}",
			listener.toString());
		listener.flush();

		// shared working copy destruction
		wc.discardWorkingCopy();
		assertEquals(
			"Unexpected delta after destroying shared working copy",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			[Working copy] X.java[-]: {}",
			listener.toString());
		listener.flush();
		wc = null;


	} finally {
		if (wc != null) wc.discardWorkingCopy();
		JavaCore.removeElementChangedListener(listener);
		deleteProject("P");
	}
}
/*
 * Ensures that a delta listener that asks for POST_RECONCILE events gets those events
 * and no others.
 */
public void testListenerReconcile() throws CoreException {
	DeltaListener listener = new DeltaListener(ElementChangedEvent.POST_RECONCILE);
	ICompilationUnit wc = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		JavaCore.addElementChangedListener(listener, ElementChangedEvent.POST_RECONCILE);

		// cu creation
		IPackageFragment pkg = getPackage("P");
		ICompilationUnit cu = pkg.createCompilationUnit(
			"X.java",
			"public class X {\n" +
			"}",
			false,
			null);
		assertEquals(
			"Unexpected delta after creating CU",
			"",
			listener.toString());
		listener.flush();

		// type creation
		cu.createType(
			"class A {\n" +
			"}",
			cu.getType("X"),
			false,
			null);
		assertEquals(
			"Unexpected delta after creating type",
			"",
			listener.toString());
		listener.flush();

		// non-java resource creation
		createFile("P/readme.txt", "");
		assertEquals(
			"Unexpected delta after creating non-java resource",
			"",
			listener.toString());
		listener.flush();

		// shared working copy creation
		wc = cu.getWorkingCopy(new WorkingCopyOwner() {}, null);
		assertEquals(
			"Unexpected delta after creating shared working copy",
			"",
			listener.toString());
		listener.flush();

		// reconcile
		wc.getBuffer().setContents(
			"public class X {\n" +
			"  public void foo() {\n" +
			"  }\n" +
			"}");
		wc.reconcile(ICompilationUnit.NO_AST, false, null, null);
		assertEquals(
			"Unexpected delta after reconciling working copy",
			"A[-]: {}\n" +
			"X[*]: {CHILDREN | FINE GRAINED}\n" +
			"	foo()[+]: {}",
			listener.toString());
		listener.flush();

		// commit
		wc.commitWorkingCopy(false, null);
		assertEquals(
			"Unexpected delta after committing working copy",
			"",
			listener.toString());
		listener.flush();

		// shared working copy destruction
		wc.discardWorkingCopy();
		assertEquals(
			"Unexpected delta after destroying shared working copy",
			"",
			listener.toString());
		listener.flush();
		wc = null;


	} finally {
		if (wc != null) wc.discardWorkingCopy();
		JavaCore.removeElementChangedListener(listener);
		deleteProject("P");
	}
}
/**
 * Ensures that merging a java delta with another one that contains a resource delta
 * results in a java delta with the resource delta.
 * (regression test for 11210 ResourceDeltas are lost when merging deltas)
 */
public void testMergeResourceDeltas() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		ResourcesPlugin.getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					// an operation that creates a java delta without firing it
					IPackageFragment pkg = getPackageFragment("P", "", "");
					pkg.createCompilationUnit(
						"X.java",
						"public class X {\n" +
						"}",
						true,
						null);

					// an operation that generates a non java resource delta
					createFile("P/Y.txt", "");
				}
			},
			null
		);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[+]: {}\n" +
			"	ResourceDelta(/P/Y.txt)[+]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}


}
public void testModifyMethodBodyAndSave() throws CoreException {
	ICompilationUnit workingCopy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFolder("P/x/y");
		createFile("P/x/y/A.java",
			"package x.y;\n" +
			"public class A {\n" +
			"  public void foo() {\n" +
			"  }\n" +
			"}");
		ICompilationUnit cu = getCompilationUnit("P/x/y/A.java");
		workingCopy = cu.getWorkingCopy(null);
		workingCopy.getBuffer().setContents(
			"package x.y;\n" +
			"public class A {\n" +
			"  public void foo() {\n" +
			"    // method body change \n" +
			"  }\n" +
			"}");

		startDeltas();
		workingCopy.commitWorkingCopy(true, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		x.y[*]: {CHILDREN}\n" +
			"			A.java[*]: {CONTENT | FINE GRAINED | PRIMARY RESOURCE}"
		);
	} finally {
		stopDeltas();
		if (workingCopy != null) {
			workingCopy.discardWorkingCopy();
		}
		deleteProject("P");
	}
}
/*
 * Ensures that modifying the project output location (i.e. simulate a build) doesn't report any delta.
 */
public void testModifyOutputLocation1() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src"}, "bin");

		createFile("/P/bin/X.class", "");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensures that modifying a custom output location (i.e. simulate a build) doesn't report any delta.
 * (regression test for bug 27494 Source folder output folder shown in Package explorer)
 */
public void testModifyOutputLocation2() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src"}, "bin1", new String[] {"bin2"});

		createFile("/P/bin2/X.class", "");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensures that modifying a custom output location (i.e. simulate a build) doesn't report any delta.
 * (regression test for bug 27494 Source folder output folder shown in Package explorer)
 */
public void testModifyOutputLocation3() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src1", "src2"}, "bin", new String[] {"src1", null});

		createFile("/P/bin/X.class", "");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Ensures that modifying a custom output location (i.e. simulate a build) doesn't report any delta.
 * (regression test for bug 32629 DeltaProcessor walking some binary output)
 */
public void testModifyOutputLocation4() throws CoreException {
	try {
		createJavaProject("P");
		editFile(
			"/P/.classpath",
			"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
			"<classpath>\n" +
			"    <classpathentry excluding=\"src/\" kind=\"src\" output=\"bin1\" path=\"\"/>\n" +
			"    <classpathentry kind=\"src\" output=\"bin2\" path=\"src\"/>\n" +
			"    <classpathentry kind=\"output\" path=\"bin\"/>\n" +
			"</classpath>"
		);
		createFolder("/P/bin2");

		startDeltas();
		createFile("/P/bin2/X.class", "");
		assertDeltas(
			"Unexpected delta",
			""
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * bug 18953
 */
public void testModifyProjectDescriptionAndRemoveFolder() throws CoreException {
	try {
		IJavaProject project = createJavaProject("P");
		final IProject projectFolder = project.getProject();
		final IFolder folder = createFolder("/P/folder");

		getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					startDeltas();
					IProjectDescription desc = projectFolder.getDescription();
					desc.setComment("A comment");
					projectFolder.setDescription(desc, null);
					deleteResource(folder);
				}
			},
			null);

		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT}\n"+
			"	<project root>[*]: {CHILDREN}\n"+
			"		folder[-]: {}\n"+
			"	ResourceDelta(/P/.project)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Move a cu from a package to its enclosing package.
 * (regression test for bug 7033 Stale packages view after moving compilation units)
 */
public void testMoveCuInEnclosingPkg() throws CoreException {
	try {
		createJavaProject("P", new String[] {""}, "");
		createFolder("P/x/y");
		createFile("P/x/y/A.java",
			"package x.y;\n" +
			"public class A {\n" +
			"}");
		ICompilationUnit cu = getCompilationUnit("P/x/y/A.java");
		IPackageFragment pkg = getPackage("P/x");

		startDeltas();
		cu.move(pkg, null, null, true, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		x.y[*]: {CHILDREN}\n" +
			"			A.java[-]: {MOVED_TO(A.java [in x [in <project root> [in P]]])}\n" +
			"		x[*]: {CHILDREN}\n" +
			"			A.java[+]: {MOVED_FROM(A.java [in x.y [in <project root> [in P]]])}"
		);
		assertElementDescendants(
			"Unexpected children for package x",
			"x\n" +
			"  A.java\n" +
			"    package x\n" +
			"    class A",
			pkg);
		assertElementDescendants(
			"Unexpected children for package x.y",
			"x.y",
			getPackage("P/x/y"));
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Move a non-java resources that is under a dot-named folder.
 * (regression test for bug 6687 Wrong JavaModel refresh after drag and drop outside folder with dot in name)
 */
public void testMoveResInDotNamedFolder() throws CoreException {
	try {
		createJavaProject("P", new String[] {}, "");
		IProject project = getProject("P");
		createFolder("P/x.y");
		IFile file = createFile("P/x.y/test.txt", "");

		startDeltas();
		file.move(project.getFullPath().append("test.txt"), true, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CONTENT}\n" +
			"	ResourceDelta(/P/test.txt)[+]\n" +
			"	ResourceDelta(/P/x.y)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Move 2 non-java resources that were outside classpath to a package fragment root.
 * (regression test for bug 28583 Missing one unit in package view)
 */
public void testMoveTwoResInRoot() throws CoreException {
	try {
		createJavaProject("P", new String[] {"src"}, "bin");
		final IFile f1 = createFile("P/X.java", "public class X {}");
		final IFile f2 = createFile("P/Y.java", "public class Y {}");

		startDeltas();
		JavaCore.run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					f1.move(new Path("/P/src/X.java"), true, null);
					f2.move(new Path("/P/src/Y.java"), true, null);
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[+]: {}\n" +
			"			Y.java[+]: {}\n" +
			"	ResourceDelta(/P/X.java)[-]\n" +
			"	ResourceDelta(/P/Y.java)[-]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Test that deltas are generated when a nested package fragment root is removed
 * and added via core API.
 */
public void testNestedRootParentMove() throws CoreException {
	try {
		createJavaProject("P", new String[] {"nested2/src", "nested/src"}, "bin");
		deleteFolder("/P/nested2/src");

		startDeltas();
		IFolder folder = getFolder("/P/nested/src");
		folder.move(new Path("/P/nested2/src"), false, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT}\n" +
			"	nested/src[-]: {MOVED_TO(nested2/src [in P])}\n" +
			"	nested2/src[+]: {MOVED_FROM(nested/src [in P])}\n" +
			"	ResourceDelta(/P/nested)[*]\n" +
			"	ResourceDelta(/P/nested2)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Test that deltas are generated when a non-java file is
 * removed and added
 */
public void testNonJavaResourceRemoveAndAdd() throws CoreException {
	try {
		createJavaProject("P", new String[] {"src"}, "bin");
		IFile file = createFile("/P/src/read.txt", "");

		startDeltas();
		deleteResource(file);
		assertDeltas(
			"Unexpected delta after deleting /P/src/read.txt",
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CONTENT}\n" +
			"		ResourceDelta(/P/src/read.txt)[-]"
		);

		clearDeltas();
		createFile("/P/src/read.txt", "");
		assertDeltas(
			"Unexpected delta after creating /P/src/read.txt",
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CONTENT}\n" +
			"		ResourceDelta(/P/src/read.txt)[+]"
		);

	} finally {
		stopDeltas();
		deleteProject("P");
	}
}


/*
 * Open a java project.
 */
public void testOpenJavaProject() throws CoreException {
	try {
		createJavaProject("P", new String[] {""}, "");
		IProject project = getProject("P");
		project.close(null);
		startDeltas();
		project.open(null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {OPENED}\n" +
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Open a non-java project.
 */
public void testOpenNonJavaProject() throws CoreException {
	try {
		createProject("P");
		IProject project = getProject("P");
		project.close(null);
		startDeltas();
		project.open(null);
		assertDeltas(
			"Unexpected delta",
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Ensures that .classpath overwrite is taken into account.
 * (regression test for bug 21420 Changing .classpath doesn't update JDT)
 */
public void testOverwriteClasspath() throws CoreException {
	try {
		createJavaProject("P", new String[] {""}, "");
		createFolder("P/src");
		createFolder("P/bin");
		final IFile newCP = createFile(
			"P/.classpath2",
			"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
			"<classpath>\n" +
			"    <classpathentry kind=\"src\" path=\"src\"/>\n" +
			"    <classpathentry kind=\"output\" path=\"bin\"/>\n" +
			"</classpath>");
		startDeltas();
		IWorkspaceRunnable run = new IWorkspaceRunnable() {
			public void run(IProgressMonitor monitor) throws CoreException {
				IFile oldCP = newCP.getParent().getFile(new Path(".classpath"));
				deleteResource(oldCP);
				newCP.move(new Path("/P/.classpath"), true, null);
			}
		};
		getWorkspace().run(run, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	src[*]: {ADDED TO CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]\n" +
			"	ResourceDelta(/P/.classpath2)[-]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Test that deltas are generated when package fragments are added
 * and removed from a root via core API.
 */
public void testPackageFragmentAddAndRemove() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src"}, "bin");

		IFolder folder = createFolder("/P/src/p");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		p[+]: {}"
		);

		clearDeltas();
		deleteResource(folder);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		p[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Test that deltas are generated when a package fragment is moved
 * via core API.
 */
public void testPackageFragmentMove() throws CoreException {
	try {
		createJavaProject("P", new String[] {"src"}, "bin");
		IFolder folder = createFolder("/P/src/p");

		startDeltas();
		folder.move(new Path("/P/src/p2"), false, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	src[*]: {CHILDREN}\n" +
			"		p2[+]: {MOVED_FROM(p [in src [in P]])}\n" +
			"		p[-]: {MOVED_TO(p2 [in src [in P]])}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Test that deltas are generated when a package fragment root is removed
 * and added via core API.
 */
public void testPackageFragmentRootRemoveAndAdd() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src"}, "bin");

		deleteFolder("/P/src");
		assertDeltas(
			"Unexpected delta after deleting /P/src",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	src[-]: {}"
		);

		clearDeltas();
		createFolder("/P/src");
		assertDeltas(
			"Unexpected delta after creating /P/src",
			"P[*]: {CHILDREN}\n" +
			"	src[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Remove then add a binary project (in a workspace runnable).
 * (regression test for 24775 Wrong delta when replacing binary project with source project)
 */
public void testRemoveAddBinaryProject() throws CoreException {
	try {
		IJavaProject project = createJavaProject("P", new String[] {""}, "");
		createFile("P/lib.jar", "");
		project.setRawClasspath(
			new IClasspathEntry[] {
				JavaCore.newLibraryEntry(new Path("/P/lib.jar"), null, null)
			},
			null
		);

		startDeltas();
		getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					deleteProject("P");
					createJavaProject("P", new String[] {""}, "");
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {ADDED TO CLASSPATH}\n" +
			"	lib.jar[-]: {}\n" +
			"	ResourceDelta(/P/.classpath)[*]\n" +
			"	ResourceDelta(/P/.project)[*]\n" +
			"	ResourceDelta(/P/.settings)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Remove then add a java project (in a workspace runnable).
 */
public void testRemoveAddJavaProject() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		getWorkspace().run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					deleteProject("P");
					createJavaProject("P", new String[] {""}, "");
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CONTENT}\n" +
			"	ResourceDelta(/P/.classpath)[*]\n" +
			"	ResourceDelta(/P/.project)[*]\n" +
			"	ResourceDelta(/P/.settings)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Change the .classpath file so as to remove a classpath entry and remove the corresponding resource.
 * (regression test for bug 24517 type view does not notice when jar disappears)

 */
public void testRemoveCPEntryAndRoot1() throws CoreException {
	try {
		IJavaProject project = createJavaProject("P", new String[] {"src"}, "bin");

		// ensure that the project is open (there are clients of the delta only if the project is open)
		project.open(null);

		startDeltas();
		JavaCore.run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					editFile(
						"/P/.classpath",
						"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
						"<classpath>\n" +
						"    <classpathentry kind=\"output\" path=\"bin\"/>\n" +
						"</classpath>");
					deleteFolder("/P/src");
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	src[-]: {}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Remove a classpath entry and remove the corresponding resource.
 * (regression test for bug 24517 type view does not notice when jar disappears)

 */
public void testRemoveCPEntryAndRoot2() throws CoreException {
	try {
		final IJavaProject project = createJavaProject("P", new String[] {"src"}, "bin");

		// ensure that the project is open (there are clients of the delta only if the project is open)
		project.open(null);

		startDeltas();
		JavaCore.run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					project.setRawClasspath(new IClasspathEntry[] {}, null);
					deleteFolder("/P/src");
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	src[-]: {}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/*
 * Remove  the resource of a classpath entry and remove the  classpath entry.
 * (regression test for bug 24517 type view does not notice when jar disappears)

 */
public void testRemoveCPEntryAndRoot3() throws CoreException {
	try {
		final IJavaProject project = createJavaProject("P", new String[] {"src"}, "bin");

		// ensure that the project is open (there are clients of the delta only if the project is open)
		project.open(null);

		startDeltas();
		JavaCore.run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					deleteFolder("/P/src");
					project.setRawClasspath(new IClasspathEntry[] {}, null);
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	src[-]: {}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Removes the .classpath file from a Java project.
 * (regression test https://bugs.eclipse.org/bugs/show_bug.cgi?id=211290 )
 */
public void testRemoveDotClasspathFile() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {"src"}, "bin");
		moveFile("P/.classpath", "P/.classpath2");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	<project root>[*]: {CHILDREN | ADDED TO CLASSPATH}\n" +
			"		bin[+]: {}\n" +
			"	src[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[-]\n" +
			"	ResourceDelta(/P/.classpath2)[+]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that removing a library entry for an existing external library folder triggers the correct delta
 */
public void testRemoveExternalLibFolder1() throws CoreException {
	try {
		createExternalFolder("externalLib");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		setClasspath(p, new IClasspathEntry[] {});
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that removing a library entry for a non-existing external library folder triggers the correct delta
 */
public void testRemoveExternalLibFolder2() throws CoreException {
	try {
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		setClasspath(p, new IClasspathEntry[] {});
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	"+ getExternalPath() + "externalLib[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that removing an external library folder referenced by a library entry triggers the correct delta
 */
public void testRemoveExternalLibFolder3() throws CoreException {
	try {
		createExternalFolder("externalLib");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		deleteExternalResource("externalLib");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that removing an external library folder referenced by a library entry after a restart
 * triggers the correct delta
 */
public void testRemoveExternalLibFolder4() throws CoreException {
	try {
		simulateExitRestart();
		createExternalFolder("externalLib");
		startDeltas();
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib")}, "");
		deleteExternalResource("externalLib");
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib");
		deleteProject("P");
	}
}

/*
 * Ensures that removing a library entry for an existing external ZIP archive triggers the correct delta
 */
public void testRemoveZIPArchive1() throws CoreException {
	try {
		createExternalFile("externalLib.abc", "");
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib.abc")}, "");
		refreshExternalArchives(p);

		startDeltas();
		setClasspath(p, new IClasspathEntry[] {});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	"+ getExternalPath() + "externalLib.abc[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib.abc");
		deleteProject("P");
	}
}

/*
 * Ensures that removing a library entry for a non-existing external ZIP archive triggers the correct delta
 */
public void testRemoveZIPArchive2() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib.abc")}, "");
		refreshExternalArchives(p);

		startDeltas();
		setClasspath(p, new IClasspathEntry[] {});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	"+ getExternalPath() + "externalLib.abc[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Ensures that removing an external ZIP archive referenced by a library entry triggers the correct delta
 */
public void testRemoveZIPArchive3() throws CoreException {
	try {
		createExternalFile("externalLib.abc", "");
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib.abc")}, "");
		refreshExternalArchives(p);

		startDeltas();
		deleteExternalResource("externalLib.abc");
		refreshExternalArchives(p);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib.abc[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib.abc");
		deleteProject("P");
	}
}

/*
 * Ensures that removing an external ZIP archive referenced by a library entry after a restart
 * triggers the correct delta
 */
public void testRemoveZIPArchive4() throws CoreException {
	try {
		simulateExitRestart();
		createExternalFile("externalLib.abc", "");
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath("externalLib.abc")}, "");
		refreshExternalArchives(p);

		startDeltas();
		deleteExternalResource("externalLib.abc");
		refreshExternalArchives(p);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib.abc[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource("externalLib.abc");
		deleteProject("P");
	}
}

/*
 * Ensures that removing a library entry for an existing internal ZIP archive triggers the correct delta
 */
public void testRemoveZIPArchive5() throws CoreException {
	try {
		IJavaProject p = createJavaProject("P", new String[0], new String[] {"/P/internalLib.abc"}, "");
		createFile("/P/internalLib.abc", "");

		startDeltas();
		setClasspath(p, new IClasspathEntry[] {});
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	internalLib.abc[*]: {REMOVED FROM CLASSPATH}\n" +
			"	ResourceDelta(/P/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}

/*
 * Remove the java nature of an existing java project.
 */
public void testRemoveJavaNature() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		removeJavaNature("P");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[-]: {}\n" +
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
public void testRemoveJavaProject() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		deleteProject("P");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P[-]: {}"
		);
	} finally {
		stopDeltas();
	}
}
/*
 * Remove a non-java project.
 */
public void testRemoveNonJavaProject() throws CoreException {
	try {
		createProject("P");
		startDeltas();
		deleteProject("P");
		assertDeltas(
			"Should get a non-Java resource delta",
			"ResourceDelta(/P)"
		);
	} finally {
		stopDeltas();
	}
}
/*
 * Removing a non-java project that contains a jar referenced in another project should produce
 * a delta on this other project.
 * (regression test for bug 19058 Closing non-java project doesn't remove root from java project)
 */
public void testRemoveNonJavaProjectUpdateDependent1() throws CoreException {
	try {
		createProject("SP");
		createFile("/SP/x.jar", "");
		createJavaProject("JP", new String[] {""}, new String[] {"/SP/x.jar"}, "");
		startDeltas();
		deleteProject("SP");
		assertDeltas(
			"Unexpected delta",
			"JP[*]: {CHILDREN}\n" +
			"	/SP/x.jar[-]: {}\n" +
			"ResourceDelta(/SP)"
		);
	} finally {
		stopDeltas();
		deleteProject("SP");
		deleteProject("JP");
	}
}
/*
 * Removing a non-java project and another project reference a non exiting folder in the deleted project
 * should not produce a delta on this other project (and no null pointer exception)
 * (regression test for bug 19131 NPE when removing a project containing missing classfile folder)
 */
public void testRemoveNonJavaProjectUpdateDependent2() throws CoreException {
	try {
		createProject("SP");
		createJavaProject("JP", new String[] {""}, new String[] {"/SP/missing"}, "");
		startDeltas();
		deleteProject("SP");
		assertDeltas(
			"Unexpected delta",
			"ResourceDelta(/SP)"
		);
	} finally {
		stopDeltas();
		deleteProject("SP");
		deleteProject("JP");
	}
}
/*
 * Removing a non-java project that contains a jar referenced in another project should produce
 * a delta on this other project. Case of the removal being done right after start-up.
 * (regression test for bug 31377 NullPointerException on binary import)
 */
public void testRemoveNonJavaProjectUpdateDependent3() throws CoreException {
	try {
		createProject("SP");
		createFile("/SP/x.jar", "");
		createJavaProject("JP", new String[] {""}, new String[] {"/SP/x.jar"}, "");

		// simulate start-up state of DeltaProcessor
		DeltaProcessingState deltaState = JavaModelManager.getJavaModelManager().deltaState;
		deltaState.oldRoots = null;
		deltaState.roots = null;
		deltaState.rootsAreStale = true;

		startDeltas();
		JavaCore.run(
			new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					deleteProject("SP");
				}
			},
			null);
		assertDeltas(
			"Unexpected delta",
			"JP[*]: {CHILDREN}\n" +
			"	/SP/x.jar[-]: {}\n" +
			"ResourceDelta(/SP)"
		);
	} finally {
		stopDeltas();
		deleteProject("SP");
		deleteProject("JP");
	}
}
/*
 * Remove a non-Java resource .jar from a project, this .jar being on the classpath of another project
 * (regression test for bug 185310 Removing internal jar referenced from another project doesn't update Package Explorer)
 */
public void testRemoveNonJavaResourceJar() throws CoreException {
	try {
		createJavaProject("P1", new String[] {"src"}, "bin");
		createFile("/P1/test.jar", "");
		createJavaProject("P2", new String[0], new String[] {"/P1/test.jar"}, "");

		startDeltas();
		deleteFile("/P1/test.jar");
		assertDeltas(
			"Unexpected delta",
			"P1[*]: {CONTENT}\n" +
			"	ResourceDelta(/P1/test.jar)[-]\n" +
			"P2[*]: {CHILDREN}\n" +
			"	/P1/test.jar[-]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
	}
}
/*
 * Rename a java project.
 * (regression test for bug 7030 IllegalArgumentException renaming project)
 */
public void testRenameJavaProject() throws CoreException {
	try {
		startDeltas();
		createJavaProject("P", new String[] {""}, "");
		renameProject("P", "P1");
		assertDeltas(
			"Unexpected delta",
			"P[+]: {}\n" +
			"\n" +
			"P1[+]: {MOVED_FROM(P)}\n" +
			"P[-]: {MOVED_TO(P1)}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
		deleteProject("P1");
	}
}
public void testRenameMethodAndSave() throws CoreException {
	ICompilationUnit workingCopy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFolder("P/x/y");
		createFile("P/x/y/A.java",
			"package x.y;\n" +
			"public class A {\n" +
			"  public void foo1() {\n" +
			"  }\n" +
			"}");
		ICompilationUnit cu = getCompilationUnit("P/x/y/A.java");
		workingCopy = cu.getWorkingCopy(null);
		workingCopy.getBuffer().setContents(
			"package x.y;\n" +
			"public class A {\n" +
			"  public void foo2() {\n" +
			"  }\n" +
			"}");

		startDeltas();
		workingCopy.commitWorkingCopy(true, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		x.y[*]: {CHILDREN}\n" +
			"			A.java[*]: {CHILDREN | FINE GRAINED | PRIMARY RESOURCE}\n" +
			"				A[*]: {CHILDREN | FINE GRAINED}\n" +
			"					foo1()[-]: {}\n" +
			"					foo2()[+]: {}"
		);
	} finally {
		stopDeltas();
		if (workingCopy != null) {
			workingCopy.discardWorkingCopy();
		}
		deleteProject("P");
	}
}
/*
 * Rename a non-java project.
 * (regression test for bug 30224 No JavaElement delta when renaming non-Java project)
 */
public void testRenameNonJavaProject() throws CoreException {
	try {
		createProject("P");
		startDeltas();
		renameProject("P", "P1");
		assertDeltas(
			"Unexpected delta",
			"ResourceDelta(/P)\n" +
			"ResourceDelta(/P1)"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
		deleteProject("P1");
	}
}
/*
 * Rename an outer pkg fragment.
 * (regression test for bug 24685 Inner package fragments gets deleted - model out of synch)
 */
public void testRenameOuterPkgFragment() throws CoreException {
	try {
		createJavaProject("P", new String[] {""}, "");
		createFolder("P/x/y");
		createFile(
			"P/x/y/X.java",
			"package x.y;\n" +
			"public class X {\n" +
			"}");
		startDeltas();
		IPackageFragment pkg = getPackageFragment("P", "", "x");
		pkg.rename("z", false, null);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		z[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
/**
 * Ensures that saving a working copy doesn't change the underlying resource.
 * (only commit should do so)
 */
public void testSaveWorkingCopy() throws CoreException {
	ICompilationUnit copy = null;
	try {
		createJavaProject("P", new String[] {""}, "");
		createFile("P/X.java",
			"public class X {\n" +
			"}");
		ICompilationUnit unit = getCompilationUnit("P", "", "", "X.java");
		copy = unit.getWorkingCopy(null);
		copy.getType("X").createMethod("void foo() {}", null, true, null);
		startDeltas();
		copy.save(null, true);
		assertWorkingCopyDeltas(
			"Unexpected delta after saving working copy",
			""
		);
		copy.commitWorkingCopy(true, null);
		assertDeltas(
			"Unexpected delta after committing working copy",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		<default>[*]: {CHILDREN}\n" +
			"			X.java[*]: {CHILDREN | FINE GRAINED | PRIMARY RESOURCE}\n" +
			"				X[*]: {CHILDREN | FINE GRAINED}\n" +
			"					foo()[+]: {}"
		);
	} finally {
		stopDeltas();
		if (copy != null) copy.discardWorkingCopy();
		deleteProject("P");
	}
}


/**
 * Ensure that a classpath change is detected even on a project which got closed
 */
public void testSetClasspathOnFreshProject() throws CoreException {
	try {
		createProject("LibProj");
		createFile("LibProj/mylib.jar", "");
		JavaProject p1 = (JavaProject)createJavaProject("P1", new String[] {""}, "bin");
		createFolder("P1/src2");

		p1.getProject().close(null);
		p1.getProject().open(null);

		startDeltas();

		IClasspathEntry[] classpath =
			new IClasspathEntry[] {
				JavaCore.newSourceEntry(new Path("/P1/src2")),
				JavaCore.newLibraryEntry(new Path("/LibProj/mylib.jar"), null, null)
			};
		p1.setRawClasspath(classpath, null);
		assertDeltas(
			"Should notice src2 and myLib additions to the classpath",
			"P1[*]: {CHILDREN | CONTENT | RAW CLASSPATH CHANGED | RESOLVED CLASSPATH CHANGED}\n" +
			"	/LibProj/mylib.jar[*]: {ADDED TO CLASSPATH}\n" +
			"	<project root>[*]: {REMOVED FROM CLASSPATH}\n" +
			"	src2[*]: {ADDED TO CLASSPATH}\n" +
			"	ResourceDelta(/P1/.classpath)[*]"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("LibProj");
	}
}
/**
 * Ensures that setting a classpath variable when there is exactly one project
 * triggers a java element delta.
 */
public void testSetClasspathVariable1() throws CoreException {
	try {
		createProject("LibProj");
		createFile("LibProj/mylib.jar", "");
		createFile("LibProj/otherlib.jar", "");
		JavaCore.setClasspathVariables(new String[] {"LIB"}, new IPath[] {new Path("/LibProj/mylib.jar")}, null);
		createJavaProject("P", new String[] {""}, new String[] {"LIB"}, "");
		startDeltas();
		JavaCore.setClasspathVariables(new String[] {"LIB"}, new IPath[] {new Path("/LibProj/otherlib.jar")}, null);
		assertDeltas(
			"Unexpected delta after setting classpath variable",
			"P[*]: {CHILDREN | RESOLVED CLASSPATH CHANGED}\n" +
			"	/LibProj/mylib.jar[*]: {REMOVED FROM CLASSPATH}\n" +
			"	/LibProj/otherlib.jar[*]: {ADDED TO CLASSPATH}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
		deleteProject("LibProj");
	}
}
/**
 * Ensures that setting a classpath variable when there are more than one project
 * triggers a java element delta.
 */
public void testSetClasspathVariable2() throws CoreException {
	try {
		createProject("LibProj");
		createFile("LibProj/mylib.jar", "");
		createFile("LibProj/otherlib.jar", "");
		JavaCore.setClasspathVariables(new String[] {"LIB"}, new IPath[] {new Path("/LibProj/mylib.jar")}, null);
		createJavaProject("P1", new String[] {""}, new String[] {"LIB"}, "");
		createJavaProject("P2", new String[] {""}, new String[] {"LIB"}, "");
		startDeltas();
		JavaCore.setClasspathVariables(new String[] {"LIB"}, new IPath[] {new Path("/LibProj/otherlib.jar")}, null);
		assertDeltas(
			"Unexpected delta after setting classpath variable",
			"P1[*]: {CHILDREN | RESOLVED CLASSPATH CHANGED}\n" +
			"	/LibProj/mylib.jar[*]: {REMOVED FROM CLASSPATH}\n" +
			"	/LibProj/otherlib.jar[*]: {ADDED TO CLASSPATH}\n" +
			"P2[*]: {CHILDREN | RESOLVED CLASSPATH CHANGED}\n" +
			"	/LibProj/mylib.jar[*]: {REMOVED FROM CLASSPATH}\n" +
			"	/LibProj/otherlib.jar[*]: {ADDED TO CLASSPATH}"
		);
	} finally {
		stopDeltas();
		deleteProject("P1");
		deleteProject("P2");
		deleteProject("LibProj");
	}
}

/**
 * Ensures that committing a working copy fires a fine grained delta.
 */
public void testWorkingCopyCommit() throws CoreException {
	try {
		createJavaProject("P", new String[] {""}, "");
		createFolder("P/x/y");
		createFile("P/x/y/A.java",
			"package x.y;\n" +
			"public class A {\n" +
			"}");
		ICompilationUnit cu = getCompilationUnit("P/x/y/A.java");
		ICompilationUnit copy = cu.getWorkingCopy(null);
		copy.getBuffer().setContents(
			"package x.y;\n" +
			"public class A {\n" +
			"  public void foo() {\n" +
			"  }\n" +
			"}");
		copy.save(null, false);
		startDeltas();
		copy.commitWorkingCopy(true, null);
		assertDeltas(
			"Unexpected delta after commit",
			"P[*]: {CHILDREN}\n" +
			"	<project root>[*]: {CHILDREN}\n" +
			"		x.y[*]: {CHILDREN}\n" +
			"			A.java[*]: {CHILDREN | FINE GRAINED | PRIMARY RESOURCE}\n" +
			"				A[*]: {CHILDREN | FINE GRAINED}\n" +
			"					foo()[+]: {}"
		);
	} finally {
		stopDeltas();
		deleteProject("P");
	}
}
public void testChangeExternalJar() throws CoreException {
	String jarName = "externalLib.jar";
	try {
		createExternalFile(jarName, "");
		IJavaProject p = createJavaProject("P", new String[0], new String[] {getExternalResourcePath(jarName)}, "");
		refreshExternalArchives(p);

		startDeltas();
		touch(getExternalFile(jarName));
		refresh(p);
		assertDeltas(
			"Unexpected delta",
			"P[*]: {CHILDREN}\n" +
			"	"+ getExternalPath() + "externalLib.jar[*]: {CONTENT | ARCHIVE CONTENT CHANGED}"
		);
	} finally {
		stopDeltas();
		deleteExternalResource(jarName);
		deleteProject("P");
	}
}
/**
 * @bug 455882: AIOOB in JavaElementDelta.addAffectedChild
 * @test Verify that AIOOB is not thrown when childIndex is used.
 * @see "https://bugs.eclipse.org/bugs/show_bug.cgi?id=455882"
 */
public void testBug455882() {
	JavaElementDelta delta = new JavaElementDelta(getJavaModel());
	delta.added(getJavaProject("P1"));
	delta.added(getJavaProject("P2"));
	delta.added(getJavaProject("P3"));
	delta.added(getJavaProject("P4"));
	delta.movedFrom(getJavaProject("P3"), getJavaProject("P5"));
	delta.movedFrom(getJavaProject("P4"), getJavaProject("P6"));
	assertDeltas(
		"Unexpected delta",
		"Java Model[*]: {CHILDREN}\n" +
		"	P1[+]: {}\n" +
		"	P2[+]: {}",
		delta
	);
}
}