1 files changed, 63 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/vfs/UnixFileSystemTest.java b/src/test/java/com/google/devtools/build/lib/vfs/UnixFileSystemTest.java
new file mode 100644
index 0000000000..0ded4048a6
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/vfs/UnixFileSystemTest.java
@@ -0,0 +1,63 @@
+// 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.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.IOException;
+
+/**
+ * Tests for the {@link UnixFileSystem} class.
+ */
+@RunWith(JUnit4.class)
+public class UnixFileSystemTest extends SymlinkAwareFileSystemTest {
+
+  @Override
+  protected FileSystem getFreshFileSystem() {
+    return new UnixFileSystem();
+  }
+
+  @Override
+  public void destroyFileSystem(FileSystem fileSystem) {
+    // Nothing.
+  }
+
+  @Override
+  protected void expectNotFound(Path path) throws IOException {
+    assertNull(path.statIfFound());
+  }
+
+  // Most tests are just inherited from FileSystemTest.
+
+  @Test
+  public void testCircularSymlinkFound() throws Exception {
+    Path linkA = absolutize("link-a");
+    Path linkB = absolutize("link-b");
+    linkA.createSymbolicLink(linkB);
+    linkB.createSymbolicLink(linkA);
+    assertFalse(linkA.exists(Symlinks.FOLLOW));
+    try {
+      linkA.statIfFound(Symlinks.FOLLOW);
+      fail();
+    } catch (IOException expected) {
+      // Expected.
+    }
+  }
+}