HBASE-22886 Code Coverage Improvement: Create Unit Tests for class ConnectionId

Signed-off-by: Jan Hentschel <jan.hentschel@ultratendency.com>

hbase-client/src/test/java/org/apache/hadoop/hbase/ipc/TestConnectionId.java

@@ -0,0 +1,115 @@
+/**
+ * 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.hbase.ipc;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.net.InetSocketAddress;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.security.User;
+import org.apache.hadoop.hbase.testclassification.ClientTests;
+import org.apache.hadoop.hbase.testclassification.SmallTests;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+@Category({SmallTests.class, ClientTests.class})
+public class TestConnectionId {
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+          HBaseClassTestRule.forClass(TestConnectionId.class);
+
+  private Configuration testConfig = HBaseConfiguration.create();
+  private User testUser1 = User.createUserForTesting(testConfig, "test", new String[]{"testgroup"});
+  private User testUser2 = User.createUserForTesting(testConfig, "test", new String[]{"testgroup"});
+  private String serviceName = "test";
+  private InetSocketAddress address = new InetSocketAddress(999);
+  private ConnectionId connectionId1 = new ConnectionId(testUser1, serviceName, address);
+  private ConnectionId connectionId2 = new ConnectionId(testUser2, serviceName, address);
+
+  @Test
+  public void testGetServiceName() {
+    assertEquals("test", connectionId1.getServiceName());
+  }
+
+  @Test
+  public void testGetAddress() {
+    assertEquals(address, connectionId1.getAddress());
+    assertEquals(address, connectionId2.getAddress());
+  }
+
+  @Test
+  public void testGetTicket() {
+    assertEquals(testUser1, connectionId1.getTicket());
+    assertNotEquals(testUser2, connectionId1.getTicket());
+  }
+
+  @Test
+  public void testToString() {
+    String expectedString = "0.0.0.0/0.0.0.0:999/test/test (auth:SIMPLE)";
+    assertEquals(expectedString, connectionId1.toString());
+  }
+
+  /**
+   * Test if the over-ridden equals method satisfies all the properties
+   * (reflexive, symmetry, transitive and null)
+   * along with their hashcode
+   */
+  @Test
+  public void testEqualsWithHashCode() {
+    // Test the Reflexive Property
+    assertTrue(connectionId1.equals(connectionId1));
+
+    // Test the Symmetry Property
+    ConnectionId connectionId = new ConnectionId(testUser1, serviceName, address);
+    assertTrue(connectionId.equals(connectionId1) && connectionId1.equals(connectionId));
+    assertEquals(connectionId.hashCode(), connectionId1.hashCode());
+
+    // Test the Transitive Property
+    ConnectionId connectionId3 = new ConnectionId(testUser1, serviceName, address);
+    assertTrue(connectionId1.equals(connectionId) && connectionId.equals(connectionId3) &&
+            connectionId1.equals(connectionId3));
+    assertEquals(connectionId.hashCode(), connectionId3.hashCode());
+
+    // Test For null
+    assertFalse(connectionId1.equals(null));
+
+    // Test different instances of same class
+    assertFalse(connectionId1.equals(connectionId2));
+  }
+
+  /**
+   * Test the hashcode for same object and different object with both hashcode
+   * function and static hashcode function
+   */
+  @Test
+  public void testHashCode() {
+    int testHashCode = connectionId1.hashCode();
+    int expectedHashCode = ConnectionId.hashCode(testUser1, serviceName, address);
+    assertEquals(expectedHashCode, testHashCode);
+
+    // Make sure two objects are not same and test for hashcode
+    assertNotEquals(connectionId1, connectionId2);
+    assertNotEquals(connectionId1.hashCode(), connectionId2.hashCode());
+  }
+}