org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/AssistQuickFixTest14.java

/*******************************************************************************
 * Copyright (c) 2020 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
 *     Red Hat Inc. - modified to test Java 14 quickfixes
 *******************************************************************************/
package org.eclipse.jdt.ui.tests.quickfix;

import java.util.ArrayList;

import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;

import org.eclipse.jdt.testplugin.JavaProjectHelper;

import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;

import org.eclipse.jdt.internal.corext.fix.FixMessages;

import org.eclipse.jdt.ui.tests.core.rules.Java14ProjectTestSetup;
import org.eclipse.jdt.ui.tests.core.rules.ProjectTestSetup;
import org.eclipse.jdt.ui.text.java.IInvocationContext;
import org.eclipse.jdt.ui.text.java.IJavaCompletionProposal;
import org.eclipse.jdt.ui.text.java.correction.CUCorrectionProposal;

public class AssistQuickFixTest14 extends QuickFixTest {

	@Rule
    public ProjectTestSetup projectSetup = new Java14ProjectTestSetup(true);

	private IJavaProject fJProject1;

	private IPackageFragmentRoot fSourceFolder;

	@Before
	public void setUp() throws Exception {
	}

	@After
	public void tearDown() throws Exception {
		if (fJProject1 != null) {
			JavaProjectHelper.delete(fJProject1);
		}

	}

	@Test
	public void testConvertToSwitchExpression1() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(Day day) {\n");
		buf.append("		// return variable\n");
		buf.append("		int i;\n");
		buf.append("		switch (day) {\n");
		buf.append("			case SATURDAY:\n");
		buf.append("			case SUNDAY: i = 5; break;\n");
		buf.append("			case MONDAY:\n");
		buf.append("			case TUESDAY, WEDNESDAY: i = 7; break;\n");
		buf.append("			case THURSDAY:\n");
		buf.append("			case FRIDAY: i = 14; break;\n");
		buf.append("			default :\n");
		buf.append("				i = 22;\n");
		buf.append("				break;\n");
		buf.append("		}\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		buf.append("\n");
		buf.append("enum Day {\n");
		buf.append("    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY;\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("\t\tswitch (day) {");
		IInvocationContext ctx= getCorrectionContext(cu, index, 16);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);

		CUCorrectionProposal proposal= (CUCorrectionProposal) proposals.get(0);
		String preview= getPreviewContent(proposal);

		buf= new StringBuffer();
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(Day day) {\n");
		buf.append("		// return variable\n");
		buf.append("		int i = switch (day) {\n");
		buf.append("			case SATURDAY, SUNDAY -> 5;\n");
		buf.append("			case MONDAY, TUESDAY, WEDNESDAY -> 7;\n");
		buf.append("			case THURSDAY, FRIDAY -> 14;\n");
		buf.append("			default -> 22;\n");
		buf.append("		};\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		buf.append("\n");
		buf.append("enum Day {\n");
		buf.append("    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY;\n");
		buf.append("}\n");
		String expected= buf.toString();

		assertEqualStringsIgnoreOrder(new String[] { preview }, new String[] { expected });
	}

	@Test
	public void testConvertToSwitchExpression2() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(Day day) {\n");
		buf.append("		// return variable\n");
		buf.append("		int i;\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (day) {\n");
		buf.append("			case SATURDAY:\n");
		buf.append("			case SUNDAY: i = 5; break;\n");
		buf.append("			case MONDAY:\n");
		buf.append("			case TUESDAY:\n");
		buf.append("			case WEDNESDAY: System.out.println(\"here\"); i = 7; break;\n");
		buf.append("			case THURSDAY:\n");
		buf.append("			case FRIDAY: i = 14; break;\n");
		buf.append("			default: i = 22; break;\n");
		buf.append("		}\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		buf.append("\n");
		buf.append("enum Day {\n");
		buf.append("    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY;\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);

		CUCorrectionProposal proposal= (CUCorrectionProposal) proposals.get(0);
		String preview= getPreviewContent(proposal);

		buf= new StringBuffer();
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(Day day) {\n");
		buf.append("		// return variable\n");
		buf.append("		int i;\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		i = switch (day) {\n");
		buf.append("			case SATURDAY, SUNDAY -> 5;\n");
		buf.append("			case MONDAY, TUESDAY, WEDNESDAY -> {\n");
		buf.append("				System.out.println(\"here\");\n");
		buf.append("				yield 7;\n");
		buf.append("			}\n");
		buf.append("			case THURSDAY, FRIDAY -> 14;\n");
		buf.append("			default -> 22;\n");
		buf.append("		};\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		buf.append("\n");
		buf.append("enum Day {\n");
		buf.append("    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY;\n");
		buf.append("}\n");
		String expected= buf.toString();

		assertEqualStringsIgnoreOrder(new String[] { preview }, new String[] { expected });
	}

	@Test
	public void testConvertToSwitchExpression3() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	static int i;\n");
		buf.append("	static {\n");
		buf.append("		// var comment\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (j) {\n");
		buf.append("			case 0:\n");
		buf.append("			case 1: i = 5; break;\n");
		buf.append("			case 2:\n");
		buf.append("			case 3:\n");
		buf.append("			case 4:\n");
		buf.append("                System.out.println(\"here\"); // comment 1\n");
		buf.append("                // comment 2\n");
		buf.append("                i = 7; // comment 3\n");
		buf.append("                break;\n");
		buf.append("			case 5:\n");
		buf.append("			case 6: i = 14; break;\n");
		buf.append("			default: i = 22; break;\n");
		buf.append("		}\n");
		buf.append("	}\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);

		CUCorrectionProposal proposal= (CUCorrectionProposal) proposals.get(0);
		String preview= getPreviewContent(proposal);

		buf= new StringBuffer();
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	static int i;\n");
		buf.append("	static {\n");
		buf.append("		// var comment\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		i = switch (j) {\n");
		buf.append("			case 0, 1 -> 5;\n");
		buf.append("			case 2, 3, 4 -> {\n");
		buf.append("				System.out.println(\"here\"); // comment 1\n");
		buf.append("				// comment 2\n");
		buf.append("				yield 7; // comment 3\n");
		buf.append("			}\n");
		buf.append("			case 5, 6 -> 14;\n");
		buf.append("			default -> 22;\n");
		buf.append("		};\n");
		buf.append("	}\n");
		buf.append("}\n");
		String expected= buf.toString();

		assertEqualStringsIgnoreOrder(new String[] { preview }, new String[] { expected });
	}

	@Test
	public void testConvertToSwitchExpression4() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(int j, int k) {\n");
		buf.append("		// var comment\n");
		buf.append("		int i;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (j) {\n");
		buf.append("			case 0:\n");
		buf.append("			case 1: i = k > 7 ? 5 : 6; break;\n");
		buf.append("			case 2:\n");
		buf.append("			case 3:\n");
		buf.append("			case 4: System.out.println(\"here\"); i = 7; break;\n");
		buf.append("			case 5:\n");
		buf.append("			case 6: i = 14; break;\n");
		buf.append("			default: i = 22; break;\n");
		buf.append("		}\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);

		CUCorrectionProposal proposal= (CUCorrectionProposal) proposals.get(0);
		String preview= getPreviewContent(proposal);

		buf= new StringBuffer();
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(int j, int k) {\n");
		buf.append("		// var comment\n");
		buf.append("		int i = switch (j) {\n");
		buf.append("			case 0, 1 -> k > 7 ? 5 : 6;\n");
		buf.append("			case 2, 3, 4 -> {\n");
		buf.append("				System.out.println(\"here\");\n");
		buf.append("				yield 7;\n");
		buf.append("			}\n");
		buf.append("			case 5, 6 -> 14;\n");
		buf.append("			default -> 22;\n");
		buf.append("		};\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		String expected= buf.toString();

		assertEqualStringsIgnoreOrder(new String[] { preview }, new String[] { expected });
	}

	@Test
	public void testNoConvertToSwitchExpression1() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	static int i;\n");
		buf.append("	static {\n");
		buf.append("		// var comment\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (j) {\n");
		buf.append("			case 0: break; // no statements\n");
		buf.append("			case 1: i = 5; break;\n");
		buf.append("			case 2:\n");
		buf.append("			case 3:\n");
		buf.append("			case 4: System.out.println(\"here\"); i = 7; break;\n");
		buf.append("			case 5:\n");
		buf.append("			case 6: i = 14; break;\n");
		buf.append("			default: i = 22; break;\n");
		buf.append("		}\n");
		buf.append("	}\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);
		assertProposalDoesNotExist(proposals, FixMessages.SwitchExpressionsFix_convert_to_switch_expression);

	}

	@Test
	public void testNoConvertToSwitchExpression2() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(int k) {\n");
		buf.append("		int i;\n");
		buf.append("		// var comment\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (j) {\n");
		buf.append("			case 0: System.out.println(\"here\"); // fall-through with statements\n");
		buf.append("			case 1: i = 5; break;\n");
		buf.append("			case 2:\n");
		buf.append("			case 3:\n");
		buf.append("			case 4: System.out.println(\"here\"); i = 7; break;\n");
		buf.append("			case 5:\n");
		buf.append("			case 6: i = 14; break;\n");
		buf.append("			default: i = 22; break;\n");
		buf.append("		}\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);
		assertProposalDoesNotExist(proposals, FixMessages.SwitchExpressionsFix_convert_to_switch_expression);

	}

	@Test
	public void testNoConvertToSwitchExpression3() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(int k) {\n");
		buf.append("		int i;\n");
		buf.append("		// var comment\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (j) {\n");
		buf.append("			case 0:\n");
		buf.append("			case 1: i = 5; return i; // return statement\n");
		buf.append("			case 2:\n");
		buf.append("			case 3:\n");
		buf.append("			case 4: System.out.println(\"here\"); i = 7; break;\n");
		buf.append("			case 5:\n");
		buf.append("			case 6: i = 14; break;\n");
		buf.append("			default: i = 22; break;\n");
		buf.append("		}\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);
		assertProposalDoesNotExist(proposals, FixMessages.SwitchExpressionsFix_convert_to_switch_expression);

	}

	@Test
	public void testNoConvertToSwitchExpression4() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(int k) {\n");
		buf.append("		int i;\n");
		buf.append("		// var comment\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (j) {\n");
		buf.append("			case 0:\n");
		buf.append("			case 1: i = 5; j = 5; break; // last statement not common assignment\n");
		buf.append("			case 2:\n");
		buf.append("			case 3:\n");
		buf.append("			case 4: System.out.println(\"here\"); i = 7; break;\n");
		buf.append("			case 5:\n");
		buf.append("			case 6: i = 14; break;\n");
		buf.append("			default: i = 22; break;\n");
		buf.append("		}\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		assertNoErrors(ctx);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);
		assertProposalDoesNotExist(proposals, FixMessages.SwitchExpressionsFix_convert_to_switch_expression);

	}

	@Test
	public void testNoConvertToSwitchExpression5() throws Exception {
		fJProject1= JavaProjectHelper.createJavaProject("TestProject1", "bin");
		fJProject1.setRawClasspath(projectSetup.getDefaultClasspath(), null);
		JavaProjectHelper.set14CompilerOptions(fJProject1, false);
		fSourceFolder= JavaProjectHelper.addSourceContainer(fJProject1, "src");

		StringBuffer buf= new StringBuffer();
		buf.append("module test {\n");
		buf.append("}\n");
		IPackageFragment def= fSourceFolder.createPackageFragment("", false, null);
		def.createCompilationUnit("module-info.java", buf.toString(), false, null);

		IPackageFragment pack= fSourceFolder.createPackageFragment("test", false, null);
		buf= new StringBuffer();
		buf.append("package test;\n");
		buf.append("public class Cls {\n");
		buf.append("	public int foo(int k) {\n");
		buf.append("		int i;\n");
		buf.append("		// var comment\n");
		buf.append("		int j = 4;\n");
		buf.append("		// logic comment\n");
		buf.append("		switch (j) {\n");
		buf.append("			case 0:\n");
		buf.append("			case 1: i = 5; break;\n");
		buf.append("			case 2:\n");
		buf.append("			case 3:\n");
		buf.append("			case 4: System.out.println(\"here\"); i = 7; break;\n");
		buf.append("			case 5:\n");
		buf.append("			case 6: i = 14; break;\n");
		buf.append("			// no default\n");
		buf.append("		}\n");
		buf.append("		return i;\n");
		buf.append("	}\n");
		buf.append("}\n");
		ICompilationUnit cu= pack.createCompilationUnit("Cls.java", buf.toString(), false, null);

		int index= buf.indexOf("switch");
		IInvocationContext ctx= getCorrectionContext(cu, index, 0);
		ArrayList<IJavaCompletionProposal> proposals= collectAssists(ctx, false);
		assertProposalDoesNotExist(proposals, FixMessages.SwitchExpressionsFix_convert_to_switch_expression);

	}
}