1 files changed, 87 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/vfs/UnixPathGetParentTest.java b/src/test/java/com/google/devtools/build/lib/vfs/UnixPathGetParentTest.java
new file mode 100644
index 0000000000..0f679c3e78
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/vfs/UnixPathGetParentTest.java
@@ -0,0 +1,87 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.google.devtools.build.lib.vfs;
+
+import static org.junit.Assert.assertEquals;
+
+import com.google.devtools.build.lib.testutil.TestUtils;
+import com.google.devtools.build.lib.vfs.util.FileSystems;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.IOException;
+
+/**
+ * A test for {@link Path} in the context of {@link UnixFileSystem}.
+ */
+@RunWith(JUnit4.class)
+public class UnixPathGetParentTest {
+
+  private FileSystem unixFs;
+  private Path testRoot;
+
+  @Before
+  public void setUp() throws Exception {
+    unixFs = FileSystems.initDefaultAsNative();
+    testRoot = unixFs.getPath(TestUtils.tmpDir()).getRelative("UnixPathGetParentTest");
+    FileSystemUtils.createDirectoryAndParents(testRoot);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    FileSystemUtils.deleteTree(testRoot); // (comment out during debugging)
+  }
+
+  private Path getParent(String path) {
+    return unixFs.getPath(path).getParentDirectory();
+  }
+
+  @Test
+  public void testAbsoluteRootHasNoParent() {
+    assertEquals(null, getParent("/"));
+  }
+
+  @Test
+  public void testParentOfSimpleDirectory() {
+    assertEquals("/foo", getParent("/foo/bar").getPathString());
+  }
+
+  @Test
+  public void testParentOfDotDotInMiddleOfPathname() {
+    assertEquals("/", getParent("/foo/../bar").getPathString());
+  }
+
+  @Test
+  public void testGetPathDoesNormalizationWithoutIO() throws IOException {
+    Path tmp = testRoot.getChild("tmp");
+    Path tmpWiz = tmp.getChild("wiz");
+
+    tmp.createDirectory();
+
+    // ln -sf /tmp /tmp/wiz
+    tmpWiz.createSymbolicLink(tmp);
+
+    assertEquals(testRoot, tmp.getParentDirectory());
+
+    assertEquals(tmp, tmpWiz.getParentDirectory());
+
+    // Under UNIX, inode(/tmp/wiz/..) == inode(/).  However getPath() does not
+    // perform I/O, only string operations, so it disagrees:
+    assertEquals(tmp, tmp.getRelative(new PathFragment("wiz/..")));
+  }
+}