WIP, DONT MERGE

Fixes: eclipse-platform#470
Signed-off-by: Simeon Andreev <[email protected]>

resources/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/ProjectLinksTest.java

@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Simeon Andreev 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:
+ *     Simeon Andreev - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.core.tests.resources;
+
+import java.nio.file.*;
+import java.util.List;
+import org.eclipse.core.resources.*;
+import org.eclipse.core.runtime.IPath;
+
+/**
+ *
+ */
+public class ProjectLinksTest extends ResourceTest {
+
+	private Path tmpFolder;
+	private IPath tmpPath;
+
+	@Override
+	protected void setUp() throws Exception {
+		super.setUp();
+		tmpPath = getRandomLocation();
+		tmpFolder = Paths.get(tmpPath.toOSString());
+		Files.createDirectory(tmpFolder);
+	}
+
+	@Override
+	protected void tearDown() throws Exception {
+		try {
+			Files.deleteIfExists(tmpFolder);
+		} finally {
+			super.tearDown();
+		}
+	}
+
+	/**
+	 * Tests that link information is updated after closing a project, deleting a
+	 * link in the {@code .project} file and then opening the project.
+	 */
+	public void testCloseProjectDeleteLinksAndOpen_GH470() throws Exception {
+		String linkedFolderName = "test";
+		IWorkspaceRoot root = getWorkspace().getRoot();
+		IProject project = root.getProject(getUniqueString());
+
+		project.create(getMonitor());
+		project.open(getMonitor());
+		project.refreshLocal(IResource.DEPTH_INFINITE, getMonitor());
+
+		IFolder folder = project.getFolder(linkedFolderName);
+
+		IFile dotProject = project.getFile(".project");
+		Path dotProjectPath = Paths.get(dotProject.getLocationURI());
+
+		List<String> dotProjectContentsWithoutLink = Files.readAllLines(dotProjectPath);
+
+		folder.createLink(tmpPath, IResource.NONE, getMonitor());
+		project.refreshLocal(IResource.DEPTH_INFINITE, getMonitor());
+
+		assertTrue("Failed to create linked folder in test project", folder.isLinked());
+
+		project.close(getMonitor());
+
+		Files.write(dotProjectPath, dotProjectContentsWithoutLink);
+
+		project.open(getMonitor());
+		project.refreshLocal(IResource.DEPTH_INFINITE, getMonitor());
+
+		folder = project.getFolder(linkedFolderName);
+		assertFalse("Expected folder to not be linked after re-opening project", folder.isLinked());
+	}
+}