Added unit tests for Versioned and MultiValuedTimestamp classes.

Change-Id: I12c05c546a75aad6ddbe1d63aaa152a1ed642759

+/*
+ * 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.store.service;
+
+import com.google.common.testing.EqualsTester;
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.lang.reflect.Constructor;
+import java.util.Arrays;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+
+/**
+ * MultiValuedTimestamp unit tests.
+ */
+public class MultiValuedTimestampTest extends TestCase {
+
+    private final MultiValuedTimestamp<Integer, Integer> stats1 = new MultiValuedTimestamp<>(1, 3);
+
+    private final MultiValuedTimestamp<Integer, Integer> stats2 = new MultiValuedTimestamp<>(1, 2);
+
+
+    /**
+     * Tests the creation of the MapEvent object.
+     */
+    @Test
+    public void testConstruction() {
+        assertThat(stats1.value1(), is(1));
+        assertThat(stats1.value2(), is(3));
+    }
+
+    /**
+     * Tests the toCompare function.
+     */
+    @Test
+    public void testToCompare() {
+        assertThat(stats1.compareTo(stats2), is(1));
+    }
+
+    /**
+     * Tests the equals, hashCode and toString methods using Guava EqualsTester.
+     */
+    @Test
+    public void testEquals() {
+        new EqualsTester()
+                .addEqualityGroup(stats1, stats1)
+                .addEqualityGroup(stats2)
+                .testEquals();
+    }
+
+    /**
+     * Tests that the empty argument list constructor for serialization
+     * is present and creates a proper object.
+     */
+    @Test
+    public void testSerializerConstructor() {
+        try {
+            Constructor[] constructors = MultiValuedTimestamp.class.getDeclaredConstructors();
+            assertThat(constructors, notNullValue());
+            Arrays.stream(constructors).filter(ctor ->
+                    ctor.getParameterTypes().length == 0)
+                    .forEach(noParamsCtor -> {
+                        try {
+                            noParamsCtor.setAccessible(true);
+                            MultiValuedTimestamp stats =
+                                    (MultiValuedTimestamp) noParamsCtor.newInstance();
+                            assertThat(stats, notNullValue());
+                        } catch (Exception e) {
+                            Assert.fail("Exception instantiating no parameters constructor");
+                        }
+                    });
+        } catch (Exception e) {
+            Assert.fail("Exception looking up constructors");
+        }
+    }
+}
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+/*
+ * 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.store.service;
+
+import com.google.common.testing.EqualsTester;
+import junit.framework.TestCase;
+import org.junit.Test;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+
+/**
+ * Versioned unit tests.
+ */
+public class VersionedTest extends TestCase {
+
+    private final Versioned<Integer> stats1 = new Versioned<>(1, 2, 3);
+
+    private final Versioned<Integer> stats2 = new Versioned<>(1, 2);
+
+    /**
+     * Tests the creation of the MapEvent object.
+     */
+    @Test
+    public void testConstruction() {
+        assertThat(stats1.value(), is(1));
+        assertThat(stats1.version(), is(2L));
+        assertThat(stats1.creationTime(), is(3L));
+    }
+
+    /**
+     * Maps an Integer to a String - Utility function to test the map function.
+     * @param a Actual Integer parameter.
+     * @return String Mapped valued.
+     */
+    public static String transform(Integer a) {
+        return Integer.toString(a);
+    }
+
+    /**
+     * Tests the map function.
+     */
+    @Test
+    public void testMap() {
+        Versioned<String> tempObj = stats1.<String>map(VersionedTest::transform);
+        assertThat(tempObj.value(), is("1"));
+    }
+
+    /**
+     * Tests the equals, hashCode and toString methods using Guava EqualsTester.
+     */
+    @Test
+    public void testEquals() {
+        new EqualsTester()
+                .addEqualityGroup(stats1, stats1)
+                .addEqualityGroup(stats2)
+                .testEquals();
+    }
+
+}
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