Update from Google.
--
MOE_MIGRATED_REVID=85702957
diff --git a/src/test/java/com/google/devtools/build/lib/vfs/FileSystemsTest.java b/src/test/java/com/google/devtools/build/lib/vfs/FileSystemsTest.java
new file mode 100644
index 0000000..88a000f
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/vfs/FileSystemsTest.java
@@ -0,0 +1,48 @@
+// 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.assertNotSame;
+import static org.junit.Assert.assertSame;
+
+import com.google.devtools.build.lib.vfs.util.FileSystems;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/**
+ * This class handles the tests for the FileSystems class.
+ */
+@RunWith(JUnit4.class)
+public class FileSystemsTest {
+
+ @Test
+ public void testFileSystemsCreatesOnlyOneDefaultNative() {
+ assertSame(FileSystems.initDefaultAsNative(),
+ FileSystems.initDefaultAsNative());
+ }
+
+ @Test
+ public void testFileSystemsCreatesOnlyOneDefaultJavaIo() {
+ assertSame(FileSystems.initDefaultAsJavaIo(),
+ FileSystems.initDefaultAsJavaIo());
+ }
+
+ @Test
+ public void testFileSystemsCanSwitchDefaults() {
+ assertNotSame(FileSystems.initDefaultAsNative(),
+ FileSystems.initDefaultAsJavaIo());
+ }
+}
