Implement kubevirt loadbalancer service with unit tests

Change-Id: I1c29e75aa5196b497f8f12f1d182788e3d173244
(cherry picked from commit 870abf8c7a7904c5953e20807ee7c681d8b5cd0b)
diff --git a/apps/kubevirt-networking/api/src/test/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtLoadBalancerTest.java b/apps/kubevirt-networking/api/src/test/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtLoadBalancerTest.java
new file mode 100644
index 0000000..e9ec471
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/test/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtLoadBalancerTest.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2021-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.kubevirtnetworking.api;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.testing.EqualsTester;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.IpAddress;
+
+import java.util.Set;
+
+import static junit.framework.TestCase.assertEquals;
+import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
+
+/**
+ * Unit tests for the default kubevirt load balancer class.
+ */
+public class DefaultKubevirtLoadBalancerTest {
+
+    private static final String NAME_1 = "lb-1";
+    private static final String NAME_2 = "lb-2";
+    private static final String DESCRIPTION_1 = "dummy lb 1";
+    private static final String DESCRIPTION_2 = "dummy lb 2";
+    private static final String NETWORK_ID_1 = "net-1";
+    private static final String NETWORK_ID_2 = "net-2";
+    private static final IpAddress VIP_1 = IpAddress.valueOf("10.10.10.10");
+    private static final IpAddress VIP_2 = IpAddress.valueOf("20.20.20.20");
+    private static final Integer PORT_RANGE_MAX_1 = 80;
+    private static final Integer PORT_RANGE_MAX_2 = 8080;
+    private static final Integer PORT_RANGE_MIN_1 = 80;
+    private static final Integer PORT_RANGE_MIN_2 = 8080;
+    private static final String PROTOCOL_1 = "tcp";
+    private static final String PROTOCOL_2 = "udp";
+    private static final Set<IpAddress> MEMBERS_1 =
+            ImmutableSet.of(IpAddress.valueOf("10.10.10.11"),
+                    IpAddress.valueOf("10.10.10.12"));
+    private static final Set<IpAddress> MEMBERS_2 =
+            ImmutableSet.of(IpAddress.valueOf("20.20.20.21"),
+                    IpAddress.valueOf("20.20.20.22"));
+    private static final KubevirtLoadBalancerRule RULE_1 =
+            DefaultKubevirtLoadBalancerRule.builder()
+                    .protocol(PROTOCOL_1)
+                    .portRangeMax(PORT_RANGE_MAX_1)
+                    .portRangeMin(PORT_RANGE_MIN_1)
+                    .build();
+    private static final KubevirtLoadBalancerRule RULE_2 =
+            DefaultKubevirtLoadBalancerRule.builder()
+                    .protocol(PROTOCOL_2)
+                    .portRangeMax(PORT_RANGE_MAX_2)
+                    .portRangeMin(PORT_RANGE_MIN_2)
+                    .build();
+    private static final Set<KubevirtLoadBalancerRule> RULES_1 = ImmutableSet.of(RULE_1);
+    private static final Set<KubevirtLoadBalancerRule> RULES_2 = ImmutableSet.of(RULE_2);
+
+    private KubevirtLoadBalancer lb1;
+    private KubevirtLoadBalancer sameAsLb1;
+    private KubevirtLoadBalancer lb2;
+
+    /**
+     * Tests class immutability.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(DefaultKubevirtLoadBalancer.class);
+    }
+
+    /**
+     * Initial setup for this unit test.
+     */
+    @Before
+    public void setUp() {
+        lb1 = DefaultKubevirtLoadBalancer.builder()
+                .name(NAME_1)
+                .description(DESCRIPTION_1)
+                .networkId(NETWORK_ID_1)
+                .vip(VIP_1)
+                .members(MEMBERS_1)
+                .rules(RULES_1)
+                .build();
+
+        sameAsLb1 = DefaultKubevirtLoadBalancer.builder()
+                .name(NAME_1)
+                .description(DESCRIPTION_1)
+                .networkId(NETWORK_ID_1)
+                .vip(VIP_1)
+                .members(MEMBERS_1)
+                .rules(RULES_1)
+                .build();
+
+        lb2 = DefaultKubevirtLoadBalancer.builder()
+                .name(NAME_2)
+                .description(DESCRIPTION_2)
+                .networkId(NETWORK_ID_2)
+                .vip(VIP_2)
+                .members(MEMBERS_2)
+                .rules(RULES_2)
+                .build();
+    }
+
+    /**
+     * Tests object equality.
+     */
+    @Test
+    public void testEquality() {
+        new EqualsTester().addEqualityGroup(lb1, sameAsLb1)
+                .addEqualityGroup(lb2)
+                .testEquals();
+    }
+
+    /**
+     * Test object construction.
+     */
+    @Test
+    public void testConstruction() {
+        KubevirtLoadBalancer lb = lb1;
+
+        assertEquals(NAME_1, lb.name());
+        assertEquals(DESCRIPTION_1, lb.description());
+        assertEquals(NETWORK_ID_1, lb.networkId());
+        assertEquals(VIP_1, lb.vip());
+        assertEquals(MEMBERS_1, lb.members());
+        assertEquals(RULES_1, lb.rules());
+    }
+}