org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/BufferTests.java - objectteams/org.eclipse.objectteams - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2008 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.core.tests.model;

 import java.util.ArrayList;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.CoreException;

 import org.eclipse.jdt.core.*;

 import junit.framework.Test;

 public class BufferTests extends ModifyingResourceTests implements IBufferChangedListener {
 	protected ArrayList events = null;
 public BufferTests(String name) {
 	super(name);
 }
 /**
  * Cache the event
  */
 public void bufferChanged(BufferChangedEvent bufferChangedEvent) {
 	this.events.add(bufferChangedEvent);
 }
 protected IBuffer createBuffer(String path, String content) throws CoreException {
 	waitUntilIndexesReady(); // ensure that the indexer is not reading the file
 	this.createFile(path, content);
 	ICompilationUnit cu = this.getCompilationUnit(path);
 	IBuffer buffer = cu.getBuffer();
 	buffer.addBufferChangedListener(this);
 	this.events = new ArrayList();
 	return buffer;
 }
 protected void deleteBuffer(IBuffer buffer) throws CoreException {
 	buffer.removeBufferChangedListener(this);
 	IResource resource = buffer.getUnderlyingResource();
 	if (resource != null) {
 		deleteResource(resource);
 	}
 }
 /**
  * @see AbstractJavaModelTests#setUpSuite()
  */
 public void setUpSuite() throws Exception {
 	super.setUpSuite();
 	try {
 		this.createJavaProject("P", new String[] {""}, "");
 		this.createFolder("P/x/y");
 	} catch (CoreException e) {
 		e.printStackTrace();
 	}
 }

 /**
  * @see AbstractJavaModelTests#tearDownSuite()
  */
 public void tearDownSuite() throws Exception {
 	super.tearDownSuite();
 	this.deleteProject("P");
 }


 public static Test suite() {
 	return buildModelTestSuite(BufferTests.class);
 }
 /**
  * Tests appending to a buffer.
  */
 public void testAppend() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		int oldLength= buffer.getLength();
 		buffer.append("\nclass B {}");
 		assertBufferEvent(oldLength, 0, "\nclass B {}");
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package x.y;\n" +
 			"public class A {\n" +
 			"}\n" +
 			"class B {}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests appending to a read-only buffer.
  */
 public void testAppendReadOnly() throws CoreException {
 	IBuffer buffer = null;
 	try {
 		createJavaProject("P1", new String[] {}, new String[] {"JCL_LIB,JCL_SRC,JCL_SRCROOT"}, "");
 		IClassFile classFile = getClassFile("P1", getExternalJCLPathString(), "java.lang", "String.class");
 		buffer = classFile.getBuffer();
 		buffer.addBufferChangedListener(this);
 		this.events = new ArrayList();
 		buffer.append("\nclass B {}");
 		assertTrue("unexpected event", this.events.isEmpty());
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package java.lang;\n" +
 			"\n" +
 			"public class String {\n" +
 			"}\n",
 			buffer.getContents()
 		);
 		assertTrue("should not have unsaved changes", !buffer.hasUnsavedChanges());
 	} finally {
 		if (buffer != null) {
 			buffer.removeBufferChangedListener(this);
 		}
 		deleteProject("P1");
 	}
 }
 public void testClose() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		buffer.close();
 		assertBufferEvent(0, 0, null);
 	} finally {
 		deleteBuffer(buffer);
 	}
 }


 /**
  * Tests getting the underlying resource of a buffer.
  */
 public void testGetUnderlyingResource() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	ICompilationUnit copy = null;
 	try {
 		IFile file = getFile("P/x/y/A.java");
 		assertEquals("Unexpected underlying resource", file, buffer.getUnderlyingResource());

 		copy = this.getCompilationUnit("P/x/y/A.java").getWorkingCopy(null);
 		assertEquals("Unexpected underlying resource 2", file, copy.getBuffer().getUnderlyingResource());
 	} finally {
 		deleteBuffer(buffer);
 		if (copy != null) {
 			copy.discardWorkingCopy();
 		}
 	}
 }
 /**
  * Tests deleting text at the beginning of a buffer.
  */
 public void testDeleteBeginning() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		buffer.replace(0, 13, "");
 		assertBufferEvent(0, 13, null);
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"public class A {\n" +
 			"}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests deleting text in the middle of a buffer.
  */
 public void testDeleteMiddle() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		// delete "public "
 		buffer.replace(13, 7, "");
 		assertBufferEvent(13, 7, null);
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package x.y;\n" +
 			"class A {\n" +
 			"}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests deleting text at the end of a buffer.
  */
 public void testDeleteEnd() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		// delete "public class A {\n}"
 		buffer.replace(13, 18, "");
 		assertBufferEvent(13, 18, null);
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package x.y;\n",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests the buffer char retrieval via source position
  */
 public void testGetChar() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		assertEquals("Unexpected char at position 17", 'i', buffer.getChar(17));
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests the buffer char retrieval via source position doesn't throw an exception if the buffer is closed.
  * (regression test for bug 46040 NPE in Eclipse console)
  */
 public void testGetChar2() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	buffer.close();
 	try {
 		assertEquals("Unexpected char at position 17", Character.MIN_VALUE, buffer.getChar(17));
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests the buffer getLength()
  */
 public void testGetLength() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		assertEquals("Unexpected length", 31, buffer.getLength());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests the buffer text retrieval via source position
  */
 public void testGetText() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		assertSourceEquals("Unexpected text (1)", "p", buffer.getText(0, 1));
 		assertSourceEquals("Unexpected text (2)", "public", buffer.getText(13, 6));
 		assertSourceEquals("Unexpected text (3)", "", buffer.getText(10, 0));
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests inserting text at the beginning of a buffer.
  */
 public void testInsertBeginning() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		buffer.replace(0, 0, "/* copyright mycompany */\n");
 		assertBufferEvent(0, 0, "/* copyright mycompany */\n");
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"/* copyright mycompany */\n" +
 			"package x.y;\n" +
 			"public class A {\n" +
 			"}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests replacing text at the beginning of a buffer.
  */
 public void testReplaceBeginning() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		buffer.replace(0, 13, "package other;\n");
 		assertBufferEvent(0, 13, "package other;\n");
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package other;\n" +
 			"public class A {\n" +
 			"}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests replacing text in the middle of a buffer.
  */
 public void testReplaceMiddle() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		// replace "public class A" after the \n of package statement
 		buffer.replace(13, 14, "public class B");
 		assertBufferEvent(13, 14, "public class B");
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package x.y;\n" +
 			"public class B {\n" +
 			"}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests replacing text at the end of a buffer.
  */
 public void testReplaceEnd() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		// replace "}" at the end of cu with "}\n"
 		int end = buffer.getLength();
 		buffer.replace(end-1, 1, "}\n");
 		assertBufferEvent(end-1, 1, "}\n");
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package x.y;\n" +
 			"public class A {\n" +
 			"}\n",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /*
  * Ensure that saving a buffer on a non-yet existing resource and using the UTF-8 encoding doesn't throw an exception
  * (regression test for https://bugs.eclipse.org/bugs/show_bug.cgi?id=234307 )
  */
 public void testSaveNonExistingUTF8() throws Exception {
 	IBuffer buffer = (new WorkingCopyOwner() {}).createBuffer(getCompilationUnit("/P/X234307.java"));
 	buffer.setContents(
 		"public class X234307 {\n" +
 		"}"
 	);
 	IProject project = getProject("P");
 	String defaultCharset = project.getDefaultCharset();
 	try {
 		project.setDefaultCharset("UTF-8", null);
 		String newContents =
 			"public interface X234307 {\n" +
 			"}";
 		buffer.setContents(newContents);
 		buffer.save(null, false/*don't force*/);
 		char[] contents = org.eclipse.jdt.internal.compiler.util.Util.getFileCharContent(getFile("/P/X234307.java").getLocation().toFile(), null);
 		assertSourceEquals("Unexpected source", newContents, new String(contents));
 	} finally {
 		deleteBuffer(buffer); // this deletes the file as well
 		project.setDefaultCharset(defaultCharset, null);
 	}
 }
 /**
  * Tests inserting text in the middle of a buffer.
  */
 public void testInsertMiddle() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		// insert after the \n of package statement
 		buffer.replace(13, 0, "/* class comment */\n");
 		assertBufferEvent(13, 0, "/* class comment */\n");
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package x.y;\n" +
 			"/* class comment */\n" +
 			"public class A {\n" +
 			"}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }
 /**
  * Tests inserting text at the end of a buffer.
  */
 public void testInsertEnd() throws CoreException {
 	IBuffer buffer = createBuffer(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	try {
 		// insert after the \n of package statement
 		int end = buffer.getLength();
 		buffer.replace(end, 0, "\nclass B {}");
 		assertBufferEvent(end, 0, "\nclass B {}");
 		assertSourceEquals(
 			"unexpected buffer contents",
 			"package x.y;\n" +
 			"public class A {\n" +
 			"}\n" +
 			"class B {}",
 			buffer.getContents()
 		);
 		assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
 	} finally {
 		deleteBuffer(buffer);
 	}
 }

 /**
  * Tests replacing text within a buffer using a create import
  * (regression test for PR #1G7A0WI).
  */
 public void testCreateImport() throws CoreException {
 	IFile file = this.createFile(
 		"P/x/y/A.java",
 		"package x.y;\n" +
 		"public class A {\n" +
 		"}"
 	);
 	ICompilationUnit copy = null;
 	IBuffer buffer = null;
 	try {
 		copy = this.getCompilationUnit("P/x/y/A.java").getWorkingCopy(null);
 		buffer = copy.getBuffer();
 		buffer.addBufferChangedListener(this);
 		this.events = new ArrayList();
 		copy.createImport("java.io.IOException", null, null);
 		assertBufferEvents(
 			"(12, 0) import java.io.IOException;\n" +
 			"(12, 0) \n" +
 			"\n"
 		); // A.java has a \n line delimiter
 	} finally {
 		if (buffer != null) {
 			buffer.removeBufferChangedListener(this);
 		}
 		if (copy != null) {
 			copy.discardWorkingCopy();
 		}
 		deleteResource(file);
 	}
 }
 /**
  * Verify the buffer changed event.
  * The given text must contain '\n' line separators.
  */
 protected void assertBufferEvent(int offset, int length, String text) {
 	assertTrue("events should not be null", this.events != null);
 	assertTrue("events should not be empty", !this.events.isEmpty());
 	BufferChangedEvent event = (BufferChangedEvent) this.events.get(0);
 	assertEquals("unexpected offset", offset, event.getOffset());
 	assertEquals("unexpected length", length, event.getLength());
 	if (text == null) {
 		assertTrue("text should be null", event.getText() == null);
 	} else {
 		assertSourceEquals("unexpected text", text, event.getText());
 	}
 }

 protected void assertBufferEvents(String expected) {
 	StringBuffer buffer = new StringBuffer();
 	if (this.events == null)
 		buffer.append("<null>");
 	else {
 		for (int i = 0, length = this.events.size(); i < length; i++) {
 			BufferChangedEvent event = (BufferChangedEvent) this.events.get(i);
 			buffer.append('(');
 			buffer.append(event.getOffset());
 			buffer.append(", ");
 			buffer.append(event.getLength());
 			buffer.append(") ");
 			buffer.append(event.getText());
 			if (i < length-1)
 				buffer.append("\n");
 		}
 	}
 	assertSourceEquals("Unexpected buffer events", expected, buffer.toString());
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2008 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.core.tests.model;

	import java.util.ArrayList;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.CoreException;

	import org.eclipse.jdt.core.*;

	import junit.framework.Test;

	public class BufferTests extends ModifyingResourceTests implements IBufferChangedListener {
	protected ArrayList events = null;
	public BufferTests(String name) {
	super(name);
	}
	/**
	* Cache the event
	*/
	public void bufferChanged(BufferChangedEvent bufferChangedEvent) {
	this.events.add(bufferChangedEvent);
	}
	protected IBuffer createBuffer(String path, String content) throws CoreException {
	waitUntilIndexesReady(); // ensure that the indexer is not reading the file
	this.createFile(path, content);
	ICompilationUnit cu = this.getCompilationUnit(path);
	IBuffer buffer = cu.getBuffer();
	buffer.addBufferChangedListener(this);
	this.events = new ArrayList();
	return buffer;
	}
	protected void deleteBuffer(IBuffer buffer) throws CoreException {
	buffer.removeBufferChangedListener(this);
	IResource resource = buffer.getUnderlyingResource();
	if (resource != null) {
	deleteResource(resource);
	}
	}
	/**
	* @see AbstractJavaModelTests#setUpSuite()
	*/
	public void setUpSuite() throws Exception {
	super.setUpSuite();
	try {
	this.createJavaProject("P", new String[] {""}, "");
	this.createFolder("P/x/y");
	} catch (CoreException e) {
	e.printStackTrace();
	}
	}

	/**
	* @see AbstractJavaModelTests#tearDownSuite()
	*/
	public void tearDownSuite() throws Exception {
	super.tearDownSuite();
	this.deleteProject("P");
	}


	public static Test suite() {
	return buildModelTestSuite(BufferTests.class);
	}
	/**
	* Tests appending to a buffer.
	*/
	public void testAppend() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	int oldLength= buffer.getLength();
	buffer.append("\nclass B {}");
	assertBufferEvent(oldLength, 0, "\nclass B {}");
	assertSourceEquals(
	"unexpected buffer contents",
	"package x.y;\n" +
	"public class A {\n" +
	"}\n" +
	"class B {}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests appending to a read-only buffer.
	*/
	public void testAppendReadOnly() throws CoreException {
	IBuffer buffer = null;
	try {
	createJavaProject("P1", new String[] {}, new String[] {"JCL_LIB,JCL_SRC,JCL_SRCROOT"}, "");
	IClassFile classFile = getClassFile("P1", getExternalJCLPathString(), "java.lang", "String.class");
	buffer = classFile.getBuffer();
	buffer.addBufferChangedListener(this);
	this.events = new ArrayList();
	buffer.append("\nclass B {}");
	assertTrue("unexpected event", this.events.isEmpty());
	assertSourceEquals(
	"unexpected buffer contents",
	"package java.lang;\n" +
	"\n" +
	"public class String {\n" +
	"}\n",
	buffer.getContents()
	);
	assertTrue("should not have unsaved changes", !buffer.hasUnsavedChanges());
	} finally {
	if (buffer != null) {
	buffer.removeBufferChangedListener(this);
	}
	deleteProject("P1");
	}
	}
	public void testClose() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	buffer.close();
	assertBufferEvent(0, 0, null);
	} finally {
	deleteBuffer(buffer);
	}
	}


	/**
	* Tests getting the underlying resource of a buffer.
	*/
	public void testGetUnderlyingResource() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	ICompilationUnit copy = null;
	try {
	IFile file = getFile("P/x/y/A.java");
	assertEquals("Unexpected underlying resource", file, buffer.getUnderlyingResource());

	copy = this.getCompilationUnit("P/x/y/A.java").getWorkingCopy(null);
	assertEquals("Unexpected underlying resource 2", file, copy.getBuffer().getUnderlyingResource());
	} finally {
	deleteBuffer(buffer);
	if (copy != null) {
	copy.discardWorkingCopy();
	}
	}
	}
	/**
	* Tests deleting text at the beginning of a buffer.
	*/
	public void testDeleteBeginning() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	buffer.replace(0, 13, "");
	assertBufferEvent(0, 13, null);
	assertSourceEquals(
	"unexpected buffer contents",
	"public class A {\n" +
	"}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests deleting text in the middle of a buffer.
	*/
	public void testDeleteMiddle() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	// delete "public "
	buffer.replace(13, 7, "");
	assertBufferEvent(13, 7, null);
	assertSourceEquals(
	"unexpected buffer contents",
	"package x.y;\n" +
	"class A {\n" +
	"}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests deleting text at the end of a buffer.
	*/
	public void testDeleteEnd() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	// delete "public class A {\n}"
	buffer.replace(13, 18, "");
	assertBufferEvent(13, 18, null);
	assertSourceEquals(
	"unexpected buffer contents",
	"package x.y;\n",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests the buffer char retrieval via source position
	*/
	public void testGetChar() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	assertEquals("Unexpected char at position 17", 'i', buffer.getChar(17));
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests the buffer char retrieval via source position doesn't throw an exception if the buffer is closed.
	* (regression test for bug 46040 NPE in Eclipse console)
	*/
	public void testGetChar2() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	buffer.close();
	try {
	assertEquals("Unexpected char at position 17", Character.MIN_VALUE, buffer.getChar(17));
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests the buffer getLength()
	*/
	public void testGetLength() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	assertEquals("Unexpected length", 31, buffer.getLength());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests the buffer text retrieval via source position
	*/
	public void testGetText() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	assertSourceEquals("Unexpected text (1)", "p", buffer.getText(0, 1));
	assertSourceEquals("Unexpected text (2)", "public", buffer.getText(13, 6));
	assertSourceEquals("Unexpected text (3)", "", buffer.getText(10, 0));
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests inserting text at the beginning of a buffer.
	*/
	public void testInsertBeginning() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	buffer.replace(0, 0, "/* copyright mycompany */\n");
	assertBufferEvent(0, 0, "/* copyright mycompany */\n");
	assertSourceEquals(
	"unexpected buffer contents",
	"/* copyright mycompany */\n" +
	"package x.y;\n" +
	"public class A {\n" +
	"}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests replacing text at the beginning of a buffer.
	*/
	public void testReplaceBeginning() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	buffer.replace(0, 13, "package other;\n");
	assertBufferEvent(0, 13, "package other;\n");
	assertSourceEquals(
	"unexpected buffer contents",
	"package other;\n" +
	"public class A {\n" +
	"}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests replacing text in the middle of a buffer.
	*/
	public void testReplaceMiddle() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	// replace "public class A" after the \n of package statement
	buffer.replace(13, 14, "public class B");
	assertBufferEvent(13, 14, "public class B");
	assertSourceEquals(
	"unexpected buffer contents",
	"package x.y;\n" +
	"public class B {\n" +
	"}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests replacing text at the end of a buffer.
	*/
	public void testReplaceEnd() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	// replace "}" at the end of cu with "}\n"
	int end = buffer.getLength();
	buffer.replace(end-1, 1, "}\n");
	assertBufferEvent(end-1, 1, "}\n");
	assertSourceEquals(
	"unexpected buffer contents",
	"package x.y;\n" +
	"public class A {\n" +
	"}\n",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/*
	* Ensure that saving a buffer on a non-yet existing resource and using the UTF-8 encoding doesn't throw an exception
	* (regression test for https://bugs.eclipse.org/bugs/show_bug.cgi?id=234307 )
	*/
	public void testSaveNonExistingUTF8() throws Exception {
	IBuffer buffer = (new WorkingCopyOwner() {}).createBuffer(getCompilationUnit("/P/X234307.java"));
	buffer.setContents(
	"public class X234307 {\n" +
	"}"
	);
	IProject project = getProject("P");
	String defaultCharset = project.getDefaultCharset();
	try {
	project.setDefaultCharset("UTF-8", null);
	String newContents =
	"public interface X234307 {\n" +
	"}";
	buffer.setContents(newContents);
	buffer.save(null, false/don't force/);
	char[] contents = org.eclipse.jdt.internal.compiler.util.Util.getFileCharContent(getFile("/P/X234307.java").getLocation().toFile(), null);
	assertSourceEquals("Unexpected source", newContents, new String(contents));
	} finally {
	deleteBuffer(buffer); // this deletes the file as well
	project.setDefaultCharset(defaultCharset, null);
	}
	}
	/**
	* Tests inserting text in the middle of a buffer.
	*/
	public void testInsertMiddle() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	// insert after the \n of package statement
	buffer.replace(13, 0, "/* class comment */\n");
	assertBufferEvent(13, 0, "/* class comment */\n");
	assertSourceEquals(
	"unexpected buffer contents",
	"package x.y;\n" +
	"/* class comment */\n" +
	"public class A {\n" +
	"}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}
	/**
	* Tests inserting text at the end of a buffer.
	*/
	public void testInsertEnd() throws CoreException {
	IBuffer buffer = createBuffer(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	try {
	// insert after the \n of package statement
	int end = buffer.getLength();
	buffer.replace(end, 0, "\nclass B {}");
	assertBufferEvent(end, 0, "\nclass B {}");
	assertSourceEquals(
	"unexpected buffer contents",
	"package x.y;\n" +
	"public class A {\n" +
	"}\n" +
	"class B {}",
	buffer.getContents()
	);
	assertTrue("should have unsaved changes", buffer.hasUnsavedChanges());
	} finally {
	deleteBuffer(buffer);
	}
	}

	/**
	* Tests replacing text within a buffer using a create import
	* (regression test for PR #1G7A0WI).
	*/
	public void testCreateImport() throws CoreException {
	IFile file = this.createFile(
	"P/x/y/A.java",
	"package x.y;\n" +
	"public class A {\n" +
	"}"
	);
	ICompilationUnit copy = null;
	IBuffer buffer = null;
	try {
	copy = this.getCompilationUnit("P/x/y/A.java").getWorkingCopy(null);
	buffer = copy.getBuffer();
	buffer.addBufferChangedListener(this);
	this.events = new ArrayList();
	copy.createImport("java.io.IOException", null, null);
	assertBufferEvents(
	"(12, 0) import java.io.IOException;\n" +
	"(12, 0) \n" +
	"\n"
	); // A.java has a \n line delimiter
	} finally {
	if (buffer != null) {
	buffer.removeBufferChangedListener(this);
	}
	if (copy != null) {
	copy.discardWorkingCopy();
	}
	deleteResource(file);
	}
	}
	/**
	* Verify the buffer changed event.
	* The given text must contain '\n' line separators.
	*/
	protected void assertBufferEvent(int offset, int length, String text) {
	assertTrue("events should not be null", this.events != null);
	assertTrue("events should not be empty", !this.events.isEmpty());
	BufferChangedEvent event = (BufferChangedEvent) this.events.get(0);
	assertEquals("unexpected offset", offset, event.getOffset());
	assertEquals("unexpected length", length, event.getLength());
	if (text == null) {
	assertTrue("text should be null", event.getText() == null);
	} else {
	assertSourceEquals("unexpected text", text, event.getText());
	}
	}

	protected void assertBufferEvents(String expected) {
	StringBuffer buffer = new StringBuffer();
	if (this.events == null)
	buffer.append("<null>");
	else {
	for (int i = 0, length = this.events.size(); i < length; i++) {
	BufferChangedEvent event = (BufferChangedEvent) this.events.get(i);
	buffer.append('(');
	buffer.append(event.getOffset());
	buffer.append(", ");
	buffer.append(event.getLength());
	buffer.append(") ");
	buffer.append(event.getText());
	if (i < length-1)
	buffer.append("\n");
	}
	}
	assertSourceEquals("Unexpected buffer events", expected, buffer.toString());
	}
	}