1 files changed, 280 insertions, 0 deletions
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/FSTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/FSTest.java
new file mode 100644
index 0000000000..3a7fa2388e
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/FSTest.java
@@ -0,0 +1,280 @@
+/*
+ * Copyright (C) 2012-2013, Robin Rosenberg <robin.rosenberg@dewire.com> and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Distribution License v. 1.0 which is available at
+ * https://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+package org.eclipse.jgit.util;
+
+import static java.time.Instant.EPOCH;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeNoException;
+import static org.junit.Assume.assumeTrue;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+import java.nio.file.attribute.FileTime;
+import java.nio.file.attribute.PosixFileAttributeView;
+import java.nio.file.attribute.PosixFilePermission;
+import java.time.Duration;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+
+import org.eclipse.jgit.errors.CommandFailedException;
+import org.eclipse.jgit.junit.MockSystemReader;
+import org.eclipse.jgit.junit.RepositoryTestCase;
+import org.eclipse.jgit.lib.RepositoryCache;
+import org.junit.After;
+import org.junit.Assume;
+import org.junit.Before;
+import org.junit.Test;
+
+public class FSTest {
+	private File trash;
+
+	@Before
+	public void setUp() throws Exception {
+		SystemReader.setInstance(new MockSystemReader());
+		trash = File.createTempFile("tmp_", "");
+		trash.delete();
+		assertTrue("mkdir " + trash, trash.mkdir());
+	}
+
+	@After
+	public void tearDown() throws Exception {
+		FileUtils.delete(trash, FileUtils.RECURSIVE | FileUtils.RETRY);
+	}
+
+	/**
+	 * The old File methods traverse symbolic links and look at the targets.
+	 * With symbolic links we usually want to modify/look at the link. For some
+	 * reason the executable attribute seems to always look at the target, but
+	 * for the other attributes like lastModified, hidden and exists we must
+	 * differ between the link and the target.
+	 *
+	 * @throws IOException
+	 * @throws InterruptedException
+	 */
+	@Test
+	public void testSymlinkAttributes() throws IOException, InterruptedException {
+		Assume.assumeTrue(FS.DETECTED.supportsSymlinks());
+		FS fs = FS.DETECTED;
+		File link = new File(trash, "a");
+		File target = new File(trash, "b");
+		fs.createSymLink(link, "b");
+		assertTrue(fs.exists(link));
+		String targetName = fs.readSymLink(link);
+		assertEquals("b", targetName);
+		assertTrue(fs.lastModifiedInstant(link).compareTo(EPOCH) > 0);
+		assertTrue(fs.exists(link));
+		assertFalse(fs.canExecute(link));
+		// The length of a symbolic link is a length of the target file path.
+		assertEquals(1, fs.length(link));
+		assertFalse(fs.exists(target));
+		assertFalse(fs.isFile(target));
+		assertFalse(fs.isDirectory(target));
+		assertFalse(fs.canExecute(target));
+
+		RepositoryTestCase.fsTick(link);
+		// Now create the link target
+		FileUtils.createNewFile(target);
+		assertTrue(fs.exists(link));
+		assertTrue(fs.lastModifiedInstant(link).compareTo(EPOCH) > 0);
+		assertTrue(fs.lastModifiedInstant(target)
+				.compareTo(fs.lastModifiedInstant(link)) > 0);
+		assertFalse(fs.canExecute(link));
+		fs.setExecute(target, true);
+		assertFalse(fs.canExecute(link));
+		assumeTrue(fs.supportsExecute());
+		assertTrue(fs.canExecute(target));
+	}
+
+	@Test
+	public void testUnicodeFilePath() throws IOException {
+		Assume.assumeTrue(FS.DETECTED.supportsSymlinks());
+		FS fs = FS.DETECTED;
+		File link = new File(trash, "ä");
+		File target = new File(trash, "å");
+
+		try {
+			// Check if the runtime can support Unicode file paths.
+			link.toPath();
+			target.toPath();
+		} catch (InvalidPathException e) {
+			// When executing a test with LANG environment variable set to non
+			// UTF-8 encoding, it seems that JRE cannot handle Unicode file
+			// paths. This happens when this test is executed in Bazel as it
+			// unsets LANG
+			// (https://docs.bazel.build/versions/master/test-encyclopedia.html#initial-conditions).
+			// Skip the test if the runtime cannot handle Unicode characters.
+			assumeNoException(e);
+		}
+
+		fs.createSymLink(link, "å");
+		assertTrue(fs.exists(link));
+		assertEquals("å", fs.readSymLink(link));
+	}
+
+	@Test
+	public void testExecutableAttributes() throws Exception {
+		FS fs = FS.DETECTED.newInstance();
+		// If this assumption fails the test is halted and ignored.
+		assumeTrue(fs instanceof FS_POSIX);
+		((FS_POSIX) fs).setUmask(0022);
+
+		File f = new File(trash, "bla");
+		assertTrue(f.createNewFile());
+		assertFalse(fs.canExecute(f));
+
+		Set<PosixFilePermission> permissions = readPermissions(f);
+		assertTrue(!permissions.contains(PosixFilePermission.OTHERS_EXECUTE));
+		assertTrue(!permissions.contains(PosixFilePermission.GROUP_EXECUTE));
+		assertTrue(!permissions.contains(PosixFilePermission.OWNER_EXECUTE));
+
+		fs.setExecute(f, true);
+
+		permissions = readPermissions(f);
+		assertTrue("'owner' execute permission not set",
+				permissions.contains(PosixFilePermission.OWNER_EXECUTE));
+		assertTrue("'group' execute permission not set",
+				permissions.contains(PosixFilePermission.GROUP_EXECUTE));
+		assertTrue("'others' execute permission not set",
+				permissions.contains(PosixFilePermission.OTHERS_EXECUTE));
+
+		((FS_POSIX) fs).setUmask(0033);
+		fs.setExecute(f, false);
+		assertFalse(fs.canExecute(f));
+		fs.setExecute(f, true);
+
+		permissions = readPermissions(f);
+		assertTrue("'owner' execute permission not set",
+				permissions.contains(PosixFilePermission.OWNER_EXECUTE));
+		assertFalse("'group' execute permission set",
+				permissions.contains(PosixFilePermission.GROUP_EXECUTE));
+		assertFalse("'others' execute permission set",
+				permissions.contains(PosixFilePermission.OTHERS_EXECUTE));
+	}
+
+	private Set<PosixFilePermission> readPermissions(File f) throws IOException {
+		return Files
+				.getFileAttributeView(f.toPath(), PosixFileAttributeView.class)
+				.readAttributes().permissions();
+	}
+
+	@Test(expected = CommandFailedException.class)
+	public void testReadPipePosixCommandFailure()
+			throws CommandFailedException {
+		FS fs = FS.DETECTED.newInstance();
+		assumeTrue(fs instanceof FS_POSIX);
+
+		FS.readPipe(fs.userHome(),
+				new String[] { "/bin/sh", "-c", "exit 1" },
+				SystemReader.getInstance().getDefaultCharset().name());
+	}
+
+	@Test(expected = CommandFailedException.class)
+	public void testReadPipeCommandStartFailure()
+			throws CommandFailedException {
+		FS fs = FS.DETECTED.newInstance();
+
+		FS.readPipe(fs.userHome(),
+				  new String[] { "this-command-does-not-exist" },
+				  SystemReader.getInstance().getDefaultCharset().name());
+	}
+
+	@Test
+	@SuppressWarnings("boxing")
+	public void testConcurrentSymlinkSupport()
+			throws ExecutionException, InterruptedException {
+		Assume.assumeTrue(FS.DETECTED.supportsSymlinks());
+		int n = 3;
+		List<CompletableFuture<Boolean>> futures = new ArrayList<>();
+		for (int i = 0; i < n; i++) {
+			futures.add(CompletableFuture.supplyAsync(
+					() -> FS.DETECTED.newInstance().supportsSymlinks()));
+		}
+
+		for (int i = 0; i < n; i++) {
+			assertTrue(futures.get(i).get());
+		}
+	}
+
+	@Test
+	public void testFsTimestampResolution() throws Exception {
+		DateTimeFormatter formatter = DateTimeFormatter
+				.ofPattern("uuuu-MMM-dd HH:mm:ss.nnnnnnnnn", Locale.ENGLISH)
+				.withZone(ZoneId.systemDefault());
+		Path dir = Files.createTempDirectory("probe-filesystem");
+		Duration resolution = FS.getFileStoreAttributes(dir)
+				.getFsTimestampResolution();
+		long resolutionNs = resolution.toNanos();
+		assertTrue(resolutionNs > 0);
+		for (int i = 0; i < 10; i++) {
+			Path f = null;
+			try {
+				f = dir.resolve("testTimestampResolution" + i);
+				Files.createFile(f);
+				FileUtils.touch(f);
+				FileTime t1 = Files.getLastModifiedTime(f);
+				TimeUnit.NANOSECONDS.sleep(resolutionNs);
+				FileUtils.touch(f);
+				FileTime t2 = Files.getLastModifiedTime(f);
+				assertTrue(String.format(
+						"expected t2=%s to be larger than t1=%s\nsince file timestamp resolution was measured to be %,d ns",
+						formatter.format(t2.toInstant()),
+						formatter.format(t1.toInstant()),
+						Long.valueOf(resolutionNs)), t2.compareTo(t1) > 0);
+			} finally {
+				if (f != null) {
+					Files.delete(f);
+				}
+			}
+		}
+	}
+
+	// bug 548682
+	@Test
+	public void testRepoCacheRelativePathUnbornRepo() {
+		assertFalse(RepositoryCache.FileKey
+				.isGitRepository(new File("repo.git"), FS.DETECTED));
+	}
+
+	@Test
+	public void testSearchPath() throws IOException {
+		File f1 = new File(trash, "file1");
+		FileUtils.createNewFile(f1);
+		f1.setExecutable(true);
+		File f2 = new File(trash, "file2");
+		FileUtils.createNewFile(f2);
+		assertEquals(f1, FS.searchPath(trash.getAbsolutePath(), "file1"));
+		assertNull(FS.searchPath(trash.getAbsolutePath(), "file2"));
+	}
+
+	@Test
+	public void testSearchPathEmptyPath() {
+		assertNull(FS.searchPath("", "file1"));
+		assertNull(FS.searchPath(File.pathSeparator, "file1"));
+		assertNull(FS.searchPath(File.pathSeparator + File.pathSeparator,
+				"file1"));
+		assertNull(FS.searchPath(
+				" " + File.pathSeparator + " " + File.pathSeparator + " \t",
+				"file1"));
+	}
+}