[ONOS-7905] Add default implementation for kubernetes data model

Change-Id: I08e9266dec2050e8299e4189745608a6e03fd06e
diff --git a/apps/k8s-networking/api/src/test/java/org/onosproject/k8snetworking/api/DefaultK8sNetworkTest.java b/apps/k8s-networking/api/src/test/java/org/onosproject/k8snetworking/api/DefaultK8sNetworkTest.java
new file mode 100644
index 0000000..727b0ad
--- /dev/null
+++ b/apps/k8s-networking/api/src/test/java/org/onosproject/k8snetworking/api/DefaultK8sNetworkTest.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+ *
+ * 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.k8snetworking.api;
+
+import com.google.common.testing.EqualsTester;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.IpAddress;
+
+import static junit.framework.TestCase.assertEquals;
+import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
+
+/**
+ * Unit tests for the default kubernetes network class.
+ */
+public class DefaultK8sNetworkTest {
+
+    private static final String NETWORK_ID_1 = "network-1";
+    private static final String NETWORK_ID_2 = "network-2";
+    private static final K8sNetwork.Type TYPE_1 = K8sNetwork.Type.VXLAN;
+    private static final K8sNetwork.Type TYPE_2 = K8sNetwork.Type.GENEVE;
+    private static final Integer MTU_1 = 1500;
+    private static final Integer MTU_2 = 1600;
+    private static final String SEGMENT_ID_1 = "1";
+    private static final String SEGMENT_ID_2 = "2";
+    private static final IpAddress GATEWAY_IP_1 = IpAddress.valueOf("10.10.10.1");
+    private static final IpAddress GATEWAY_IP_2 = IpAddress.valueOf("20.20.20.1");
+    private static final String CIDR_1 = "32";
+    private static final String CIDR_2 = "32";
+
+    private K8sNetwork k8sNetwork1;
+    private K8sNetwork sameAsK8sNetwork1;
+    private K8sNetwork k8sNetwork2;
+
+    /**
+     * Initial setup for this unit test.
+     */
+    @Before
+    public void setUp() {
+        k8sNetwork1 = DefaultK8sNetwork.builder()
+                .networkId(NETWORK_ID_1)
+                .type(TYPE_1)
+                .mtu(MTU_1)
+                .segmentId(SEGMENT_ID_1)
+                .gatewayIp(GATEWAY_IP_1)
+                .cidr(CIDR_1)
+                .build();
+
+        sameAsK8sNetwork1 = DefaultK8sNetwork.builder()
+                .networkId(NETWORK_ID_1)
+                .type(TYPE_1)
+                .mtu(MTU_1)
+                .segmentId(SEGMENT_ID_1)
+                .gatewayIp(GATEWAY_IP_1)
+                .cidr(CIDR_1)
+                .build();
+
+        k8sNetwork2 = DefaultK8sNetwork.builder()
+                .networkId(NETWORK_ID_2)
+                .type(TYPE_2)
+                .mtu(MTU_2)
+                .segmentId(SEGMENT_ID_2)
+                .gatewayIp(GATEWAY_IP_2)
+                .cidr(CIDR_2)
+                .build();
+    }
+
+    /**
+     * Tests class immutability.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(DefaultK8sNetwork.class);
+    }
+
+    /**
+     * Tests object equality.
+     */
+    @Test
+    public void testEquality() {
+        new EqualsTester().addEqualityGroup(k8sNetwork1, sameAsK8sNetwork1)
+                .addEqualityGroup(k8sNetwork2)
+                .testEquals();
+    }
+
+    /**
+     * Test object construction.
+     */
+    @Test
+    public void testConstruction() {
+        K8sNetwork k8sNetwork = k8sNetwork1;
+
+        assertEquals(NETWORK_ID_1, k8sNetwork.networkId());
+        assertEquals(TYPE_1, k8sNetwork.type());
+        assertEquals(MTU_1, k8sNetwork.mtu());
+        assertEquals(SEGMENT_ID_1, k8sNetwork.segmentId());
+        assertEquals(GATEWAY_IP_1, k8sNetwork.gatewayIp());
+        assertEquals(CIDR_1, k8sNetwork.cidr());
+    }
+}