GEODE-5362: Add unit test for EnumId.

geode-core/src/test/java/org/apache/geode/pdx/internal/EnumIdTest.java

@@ -0,0 +1,126 @@
+/*
+ * 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.geode.pdx.internal;
+
+import static org.apache.geode.internal.DataSerializableFixedID.ENUM_ID;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import org.apache.geode.test.junit.categories.SerializationTest;
+import org.apache.geode.test.junit.categories.UnitTest;
+
+@Category({UnitTest.class, SerializationTest.class})
+public class EnumIdTest {
+  static final int ID = 0xDEADBEEF;
+
+  @Test
+  public void testNoArgConstructor() {
+    final EnumId enumId = new EnumId();
+    assertEquals(0, enumId.intValue());
+  }
+
+  @Test
+  public void testSingleArgConstructor() {
+    final EnumId enumId = new EnumId(ID);
+    assertEquals(ID, enumId.intValue());
+  }
+
+  @Test
+  public void testGetDSFID() {
+    final EnumId enumId = new EnumId(ID);
+    assertEquals(ENUM_ID, enumId.getDSFID());
+  }
+
+  @Test
+  public void testGetDSID() {
+    final EnumId enumId = new EnumId(ID);
+    assertEquals(0xDE, enumId.getDSId());
+  }
+
+  @Test
+  public void testEnumNum() {
+    final EnumId enumId = new EnumId(ID);
+    assertEquals(0xADBEEF, enumId.getEnumNum());
+  }
+
+  @Test
+  public void testGetSerializationVersions() {
+    final EnumId enumId = new EnumId(ID);
+    assertNull(enumId.getSerializationVersions());
+  }
+
+  @Test
+  public void testHashCode() {
+    final EnumId enumId = new EnumId(ID);
+    assertEquals(enumId.hashCode(), enumId.hashCode());
+
+    final EnumId sameId = new EnumId(ID);
+    assertEquals(enumId.hashCode(), sameId.hashCode());
+
+    final EnumId differentId = new EnumId(ID + 1);
+    assertNotEquals(enumId.hashCode(), differentId.hashCode());
+  }
+
+  @Test
+  public void testEquals() {
+    final EnumId enumId = new EnumId(ID);
+    assertTrue(enumId.equals(enumId));
+    assertFalse(enumId.equals(null));
+    assertFalse(enumId.equals(new Object()));
+
+    final EnumId sameId = new EnumId(ID);
+    assertTrue(enumId.equals(sameId));
+
+    final EnumId differentId = new EnumId(ID + 1);
+    assertFalse(enumId.equals(differentId));
+  }
+
+  @Test
+  public void testToString() {
+    final EnumId enumId = new EnumId(ID);
+    final String str = enumId.toString();
+    assertNotEquals(-1, str.indexOf(Integer.toString(0xDE)));
+    assertNotEquals(-1, str.indexOf(Integer.toString(0xADBEEF)));
+  }
+
+  @Test
+  public void testToDataAndFromData() throws IOException, ClassNotFoundException {
+    final EnumId before = new EnumId(ID);
+    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(1024);
+    DataOutputStream dataOutputStream = new DataOutputStream(byteArrayOutputStream);
+    before.toData(dataOutputStream);
+    dataOutputStream.close();
+
+    final EnumId after = new EnumId();
+    ByteArrayInputStream byteArrayInputStream =
+        new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
+    DataInputStream dataInputStream = new DataInputStream(byteArrayInputStream);
+    after.fromData(dataInputStream);
+
+    assertEquals(before.intValue(), after.intValue());
+  }
+}