Migrate resources regression tests to JUnit 5

Migrates the tests in org.eclipse.core.tests.resources.regresison to
JUnit 5.
- Exchange JUnit test annotations
- Replace JUnit 4 WorkspaceTestRule with JUnit 5 WorkspaceResetExtension
- Replace JUnit 4 assertions with JUnit 5 assertions
- Replace resource cleanup via WorkspaceTestRule with usage of temp
  directories or explicit cleanups

Contributes to
#903

Author: HeikoKlare

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_006708.java

@@ -23,15 +23,13 @@
 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_006708 {
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	@Test
 	public void testBug() throws CoreException {
 		IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_025457.java

@@ -20,9 +20,9 @@
 import static org.eclipse.core.tests.resources.ResourceTestUtil.createRandomString;
 import static org.eclipse.core.tests.resources.ResourceTestUtil.createTestMonitor;
 import static org.eclipse.core.tests.resources.ResourceTestUtil.isReadOnlySupported;
-import static org.junit.Assert.assertThrows;
 import static org.junit.Assume.assumeTrue;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -32,9 +32,9 @@
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.Platform.OS;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 /**
  * Tests regression of bug 25457.  In this case, attempting to move a project
@@ -44,11 +44,9 @@
  * Note: this is similar to Bug_32076, which deals with failure to move in
  * the non case-change scenario.
  */
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_025457 {
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	@Test
 	public void testFile() throws Exception {
 		assumeTrue("only relevant on Windows", OS.isWindows());

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_026294.java

@@ -25,8 +25,8 @@
 import static org.eclipse.core.tests.resources.ResourceTestUtil.createUniqueString;
 import static org.eclipse.core.tests.resources.ResourceTestUtil.isReadOnlySupported;
 import static org.eclipse.core.tests.resources.ResourceTestUtil.setReadOnly;
-import static org.junit.Assert.assertThrows;
 import static org.junit.Assume.assumeTrue;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.io.InputStream;
 import java.util.function.Predicate;
@@ -38,15 +38,16 @@
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Platform.OS;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 /**
  * A parent container (projects and folders) would become out-of-sync if any of
  * its children could not be deleted for some reason. These platform-
  * specific test cases ensure that it does not happen.
  */
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_026294 {
 
 	private static final Predicate<IResource> isSynchronizedDepthInfinite = resource -> resource
@@ -55,9 +56,6 @@ public class Bug_026294 {
 	private static final Predicate<IResource> isSynchronizedDepthZero = resource -> resource
 			.isSynchronized(IResource.DEPTH_ZERO);
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	/**
 	 * Tries to delete an open project containing an unremovable file.
 	 * Works only for Windows.
@@ -76,7 +74,6 @@ public void testDeleteOpenProjectWindows() throws Exception {
 
 		createInWorkspace(new IResource[] { file1, file2, file3 });
 		IPath projectRoot = project.getLocation();
-		workspaceRule.deleteOnTearDown(projectRoot);
 
 		assertExistsInFileSystem(file1);
 		assertExistsInFileSystem(file2);
@@ -145,7 +142,6 @@ public void testDeleteOpenProjectLinux() throws CoreException {
 
 		createInWorkspace(new IResource[] { file1, file2 });
 		IPath projectRoot = project.getLocation();
-		workspaceRule.deleteOnTearDown(projectRoot);
 
 		try {
 			// marks folder as read-only so its files cannot be deleted on Linux
@@ -195,7 +191,6 @@ public void testDeleteClosedProjectWindows() throws Exception {
 
 		createInWorkspace(new IResource[] { file1, file2, file3 });
 		IPath projectRoot = project.getLocation();
-		workspaceRule.deleteOnTearDown(projectRoot);
 
 		// opens a file so it cannot be removed on Windows
 		try (InputStream input = file1.getContents()) {
@@ -229,10 +224,8 @@ public void testDeleteClosedProjectLinux() throws CoreException {
 		IFile file1 = folder.getFile("file1.txt");
 		IFile file2 = project.getFile("file2.txt");
 		IFile projectFile = project.getFile(IPath.fromOSString(".project"));
-
 		createInWorkspace(new IResource[] { file1, file2 });
 		IPath projectRoot = project.getLocation();
-		workspaceRule.deleteOnTearDown(projectRoot);
 
 		try {
 			// marks folder as read-only so its files cannot be removed on Linux
@@ -273,10 +266,7 @@ public void testDeleteFolderWindows() throws Exception {
 		IFolder folder = project.getFolder("a_folder");
 		IFile file1 = folder.getFile("file1.txt");
 		IFile file3 = folder.getFile("file3.txt");
-
 		createInWorkspace(new IResource[] { file1, file3 });
-		IPath projectRoot = project.getLocation();
-		workspaceRule.deleteOnTearDown(projectRoot);
 
 		// opens a file so it cannot be removed on Windows
 		try (InputStream input = file1.getContents()) {
@@ -309,10 +299,7 @@ public void testDeleteFolderLinux() throws CoreException {
 		IFolder subFolder = folder.getFolder("sub-folder");
 		IFile file1 = subFolder.getFile("file1.txt");
 		IFile file3 = folder.getFile("file3.txt");
-
 		createInWorkspace(new IResource[] { file1, file3 });
-		IPath projectRoot = project.getLocation();
-		workspaceRule.deleteOnTearDown(projectRoot);
 
 		try {
 			// marks sub-folder as read-only so its files cannot be removed on Linux

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_027271.java

@@ -15,38 +15,35 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.eclipse.core.resources.ResourcesPlugin.getWorkspace;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assume.assumeTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 
 import org.eclipse.core.resources.IPathVariableManager;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Platform.OS;
 import org.eclipse.core.runtime.Preferences;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 /**
  * Tests how changes in the underlying preference store may affect the path
  * variable manager.
  */
-
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_027271 {
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	static final String VARIABLE_PREFIX = "pathvariable."; //$NON-NLS-1$
 
-	@Before
+	@BeforeEach
 	public void setUp() {
 		clearPathVariablesProperties();
 	}
 
-	@After
+	@AfterEach
 	public void tearDown() {
 		clearPathVariablesProperties();
 	}

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_028981.java

@@ -18,8 +18,8 @@
 import static org.eclipse.core.resources.ResourcesPlugin.getWorkspace;
 import static org.eclipse.core.tests.resources.ResourceTestUtil.createInWorkspace;
 import static org.eclipse.core.tests.resources.ResourceTestUtil.createRandomString;
-import static org.junit.Assert.assertThrows;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFile;
@@ -31,19 +31,16 @@
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.QualifiedName;
 import org.eclipse.core.tests.resources.ResourceVisitorVerifier;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 /**
  * Resource#accept doesn't obey member flags for the traversal entry point.
  */
-
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_028981 {
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	@Test
 	public void testBug() throws CoreException {
 		final QualifiedName partner = new QualifiedName("org.eclipse.core.tests.resources", "myTarget");
@@ -77,25 +74,25 @@ public void testBug() throws CoreException {
 		verifier.addExpected(settings);
 		verifier.addExpected(prefs);
 		project.accept(verifier);
-		assertTrue(verifier.getMessage(), verifier.isValid());
+		assertTrue(verifier.isValid(), verifier.getMessage());
 
 		verifier.reset();
 		assertThrows(CoreException.class, () -> phantomFile.accept(verifier));
 
 		verifier.reset();
 		verifier.addExpected(phantomFile);
 		phantomFile.accept(verifier, IResource.DEPTH_INFINITE, IContainer.INCLUDE_PHANTOMS);
-		assertTrue(verifier.getMessage(), verifier.isValid());
+		assertTrue(verifier.isValid(), verifier.getMessage());
 
 		verifier.reset();
 		// no resources should be visited
 		teamPrivateFile.accept(verifier);
-		assertTrue(verifier.getMessage(), verifier.isValid());
+		assertTrue(verifier.isValid(), verifier.getMessage());
 
 		verifier.reset();
 		verifier.addExpected(teamPrivateFile);
 		teamPrivateFile.accept(verifier, IResource.DEPTH_INFINITE, IContainer.INCLUDE_TEAM_PRIVATE_MEMBERS);
-		assertTrue(verifier.getMessage(), verifier.isValid());
+		assertTrue(verifier.isValid(), verifier.getMessage());
 	}
 
 }

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_029116.java

@@ -20,19 +20,17 @@
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IProjectDescription;
 import org.eclipse.core.runtime.CoreException;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 /**
  * Test regression of bug 29116. In this bug, triggering a builder during
  * installation of a nature caused an assertion failure.
  */
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_029116 {
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	@Test
 	public void testBug() throws CoreException {
 		// Create some resource handles

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_029671.java

@@ -29,18 +29,16 @@
 import org.eclipse.core.resources.IWorkspace;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.QualifiedName;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 /**
  * When a container was moved, its children were not added to phantom space.
  */
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_029671 {
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	@Test
 	public void testBug() throws CoreException {
 		final QualifiedName partner = new QualifiedName("org.eclipse.core.tests.resources", "myTarget");

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/regression/Bug_029851.java

@@ -25,20 +25,18 @@
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.QualifiedName;
-import org.eclipse.core.tests.resources.WorkspaceTestRule;
-import org.junit.Rule;
-import org.junit.Test;
+import org.eclipse.core.tests.resources.util.WorkspaceResetExtension;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 
 /**
  * Tests regression of bug 25457. In this case, attempting to move a project
  * that is only a case change, where the move fails due to another handle being
  * open on a file in the hierarchy, would cause deletion of the source.
  */
+@ExtendWith(WorkspaceResetExtension.class)
 public class Bug_029851 {
 
-	@Rule
-	public WorkspaceTestRule workspaceRule = new WorkspaceTestRule();
-
 	private Collection<String> createChildren(int breadth, int depth, IPath prefix) {
 		ArrayList<String> result = new ArrayList<>();
 		for (int i = 0; i < breadth; i++) {