1 files changed, 52 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/util/PairTest.java b/src/test/java/com/google/devtools/build/lib/util/PairTest.java
new file mode 100644
index 0000000000..f82e12f293
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/util/PairTest.java
@@ -0,0 +1,52 @@
+// 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.util;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.util.Objects;
+
+/**
+ * Tests for {@link Pair}.
+ */
+@RunWith(JUnit4.class)
+public class PairTest {
+
+  @Test
+  public void constructor() {
+    Object a = new Object();
+    Object b = new Object();
+    Pair<Object, Object> p = Pair.of(a, b);
+    assertSame(a, p.first);
+    assertSame(b, p.second);
+    assertEquals(Pair.of(a, b), p);
+    assertEquals(Objects.hash(a, b), p.hashCode());
+  }
+
+  @Test
+  public void nullable() {
+    Pair<Object, Object> p = Pair.of(null, null);
+    assertNull(p.first);
+    assertNull(p.second);
+    p.hashCode(); // Should not throw.
+    assertTrue(p.equals(p));
+  }
+}