Unit tests for Default Group class

Change-Id: I1e28ade4dc4197a928f42924e0e9690791df30f8

+/*
+ * 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.group;
+
+import org.junit.Test;
+import org.onosproject.core.DefaultGroupId;
+import org.onosproject.core.GroupId;
+import org.onosproject.net.NetTestTools;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.testing.EqualsTester;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.*;
+import static org.onosproject.net.NetTestTools.did;
+
+/**
+ * Unit tests for DefaultGroup class.
+ */
+public class DefaultGroupTest {
+    private final GroupId id1 = new DefaultGroupId(6);
+    private final GroupId id2 = new DefaultGroupId(7);
+    private final GroupBucket bucket =
+            DefaultGroupBucket.createSelectGroupBucket(
+                    DefaultTrafficTreatment.emptyTreatment());
+    private final GroupBuckets groupBuckets =
+            new GroupBuckets(ImmutableList.of(bucket));
+    private final GroupDescription groupDesc1 =
+            new DefaultGroupDescription(did("1"),
+                    GroupDescription.Type.FAILOVER,
+                    groupBuckets);
+    private final GroupDescription groupDesc2 =
+            new DefaultGroupDescription(did("2"),
+                    GroupDescription.Type.FAILOVER,
+                    groupBuckets);
+
+    DefaultGroup group1 = new DefaultGroup(id1, groupDesc1);
+    DefaultGroup sameAsGroup1 = new DefaultGroup(id1, groupDesc1);
+    DefaultGroup group2 = new DefaultGroup(id1, groupDesc2);
+    DefaultGroup group3 = new DefaultGroup(id2, groupDesc2);
+
+    /**
+     * Tests for proper operation of equals(), hashCode() and toString() methods.
+     */
+    @Test
+    public void checkEquals() {
+        new EqualsTester()
+                .addEqualityGroup(group1, sameAsGroup1)
+                .addEqualityGroup(group2)
+                .addEqualityGroup(group3)
+                .testEquals();
+    }
+
+    /**
+     * Tests that objects are created properly.
+     */
+    @Test
+    public void checkConstruction() {
+        assertThat(group1.id(), is(id1));
+        assertThat(group1.bytes(), is(0L));
+        assertThat(group1.life(), is(0L));
+        assertThat(group1.packets(), is(0L));
+        assertThat(group1.referenceCount(), is(0L));
+        assertThat(group1.buckets(), is(groupBuckets));
+        assertThat(group1.state(), is(Group.GroupState.PENDING_ADD));
+    }
+
+    /**
+     * Tests that objects are created properly using the device based constructor.
+     */
+    @Test
+    public void checkConstructionWithDid() {
+        DefaultGroup group = new DefaultGroup(id2, NetTestTools.did("1"),
+                GroupDescription.Type.INDIRECT, groupBuckets);
+        assertThat(group.id(), is(id2));
+        assertThat(group.bytes(), is(0L));
+        assertThat(group.life(), is(0L));
+        assertThat(group.packets(), is(0L));
+        assertThat(group.referenceCount(), is(0L));
+        assertThat(group.deviceId(), is(NetTestTools.did("1")));
+        assertThat(group.buckets(), is(groupBuckets));
+    }
+}