Unit test for IntentData class

Change-Id: If98b737b4ddd92ebfb8b2a35ad5d80984b0e681a

+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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 org.onosproject.net.intent;
+
+import java.util.Collections;
+import java.util.concurrent.atomic.AtomicLong;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.core.IdGenerator;
+import org.onosproject.net.NetTestTools;
+import org.onosproject.store.Timestamp;
+
+import com.google.common.testing.EqualsTester;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+
+/**
+ * Unit tests for intent data objects.
+ */
+public class IntentDataTest {
+    private static class MockIntent extends Intent {
+        private static AtomicLong counter = new AtomicLong(0);
+
+        private final Long number;
+
+        public MockIntent(Long number) {
+            super(NetTestTools.APP_ID, Collections.emptyList());
+            this.number = number;
+        }
+
+        public Long number() {
+            return number;
+        }
+
+        public static Long nextId() {
+            return counter.getAndIncrement();
+        }
+    }
+
+    private static class MockTimestamp implements Timestamp {
+        final int value;
+
+        MockTimestamp(int value) {
+            this.value = value;
+        }
+
+        @Override
+        public int compareTo(Timestamp o) {
+            if (!(o instanceof MockTimestamp)) {
+                return -1;
+            }
+            MockTimestamp that = (MockTimestamp) o;
+            return (this.value > that.value ? -1 : (this.value == that.value ? 0 : 1));
+        }
+    }
+
+    private Timestamp timestamp1;
+    private Timestamp timestamp2;
+    private Timestamp timestamp3;
+
+    private Intent intent1;
+    private Intent intent2;
+    private Intent intent3;
+
+    private IntentData data1;
+    private IntentData data1Copy;
+    private IntentData data2;
+    private IntentData data2Copy;
+    private IntentData data3;
+    private IntentData data3Copy;
+
+    IdGenerator idGenerator;
+
+    @Before
+    public void setUpTest() {
+        idGenerator = new MockIdGenerator();
+        Intent.bindIdGenerator(idGenerator);
+
+        timestamp1 = new MockTimestamp(1);
+        timestamp2 = new MockTimestamp(2);
+        timestamp3 = new MockTimestamp(3);
+
+        intent1 = new MockIntent(1L);
+        intent2 = new MockIntent(2L);
+        intent3 = new MockIntent(3L);
+
+        data1 = new IntentData(intent1, IntentState.INSTALLED, timestamp1);
+        data1Copy = new IntentData(intent1, IntentState.INSTALLED, timestamp1);
+        data2 = new IntentData(intent2, IntentState.INSTALLED, timestamp2);
+        data2Copy = new IntentData(intent2, IntentState.INSTALLED, timestamp2);
+        data3 = new IntentData(intent3, IntentState.INSTALLED, timestamp3);
+        data3Copy = new IntentData(intent3, IntentState.INSTALLED, timestamp3);
+    }
+
+    @After
+    public void tearDownTest() {
+        Intent.unbindIdGenerator(idGenerator);
+    }
+
+    /**
+     * Checks that intent data objects are properly constructed.
+     */
+    @Test
+    public void checkConstruction() {
+        assertThat(data1.state(), is(IntentState.INSTALLED));
+        assertThat(data1.version(), is(timestamp1));
+        assertThat(data1.intent(), is(intent1));
+    }
+
+    /**
+     * Checks equals() for intent data objects.
+     */
+    @Test
+    public void checkEquals() {
+        new EqualsTester()
+                .addEqualityGroup(data1, data1Copy)
+                .addEqualityGroup(data2, data2Copy)
+                .addEqualityGroup(data3, data3Copy)
+                .testEquals();
+    }
+}