Missing file for YARN-4895.

(cherry picked from commit 5686caa9fc)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/records/TestResourceUtilization.java

@@ -0,0 +1,63 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.hadoop.yarn.api.records;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestResourceUtilization {
+
+  @Test
+  public void testResourceUtilization() {
+    ResourceUtilization u1 = ResourceUtilization.newInstance(10, 20, 0.5f);
+    ResourceUtilization u2 = ResourceUtilization.newInstance(u1);
+    ResourceUtilization u3 = ResourceUtilization.newInstance(10, 20, 0.5f);
+    ResourceUtilization u4 = ResourceUtilization.newInstance(20, 20, 0.5f);
+    ResourceUtilization u5 = ResourceUtilization.newInstance(30, 40, 0.8f);
+
+    Assert.assertEquals(u1, u2);
+    Assert.assertEquals(u1, u3);
+    Assert.assertNotEquals(u1, u4);
+    Assert.assertNotEquals(u2, u5);
+    Assert.assertNotEquals(u4, u5);
+
+    Assert.assertTrue(u1.hashCode() == u2.hashCode());
+    Assert.assertTrue(u1.hashCode() == u3.hashCode());
+    Assert.assertFalse(u1.hashCode() == u4.hashCode());
+    Assert.assertFalse(u2.hashCode() == u5.hashCode());
+    Assert.assertFalse(u4.hashCode() == u5.hashCode());
+
+    Assert.assertTrue(u1.getPhysicalMemory() == 10);
+    Assert.assertFalse(u1.getVirtualMemory() == 10);
+    Assert.assertTrue(u1.getCPU() == 0.5f);
+
+    Assert.assertEquals("<pmem:10, vmem:" + u1.getVirtualMemory()
+        + ", vCores:0.5>", u1.toString());
+
+    u1.addTo(10, 0, 0.0f);
+    Assert.assertNotEquals(u1, u2);
+    Assert.assertEquals(u1, u4);
+    u1.addTo(10, 20, 0.3f);
+    Assert.assertEquals(u1, u5);
+    u1.subtractFrom(10, 20, 0.3f);
+    Assert.assertEquals(u1, u4);
+    u1.subtractFrom(10, 0, 0.0f);
+    Assert.assertEquals(u1, u3);
+  }
+}