1 files changed, 40 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/testutil/ManualClock.java b/src/test/java/com/google/devtools/build/lib/testutil/ManualClock.java
new file mode 100644
index 0000000000..d4f6058169
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/testutil/ManualClock.java
@@ -0,0 +1,40 @@
+// 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.testutil;
+
+import com.google.devtools.build.lib.util.Clock;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * A fake clock for testing.
+ */
+public final class ManualClock implements Clock {
+  private long currentTimeMillis = 0L;
+
+  @Override
+  public long currentTimeMillis() {
+    return currentTimeMillis;
+  }
+
+  @Override
+  public long nanoTime() {
+    return TimeUnit.MILLISECONDS.toNanos(currentTimeMillis);
+  }
+
+  public void advanceMillis(long time) {
+    currentTimeMillis += time;
+  }
+}