[ONOS-2613] Unit test the BGP Update message

Change-Id: Ida968cb72e8c72e9b5131e70a2b81b4d4226614d

+/*
+ * 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.bgp;
+
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.bgpio.types.NextHop;
+
+import com.google.common.testing.EqualsTester;
+
+/**
+ * Test for NextHop BGP Path Attribute.
+ */
+public class NextHopTest {
+    private final Ip4Address value1 = Ip4Address.valueOf("12.12.12.12");
+    private final Ip4Address value2 = Ip4Address.valueOf("12.12.12.13");
+    private final NextHop attr1 = new NextHop(value1);
+    private final NextHop sameAsAttr1 = new NextHop(value1);
+    private final NextHop attr2 = new NextHop(value2);
+
+    @Test
+    public void basics() {
+        new EqualsTester()
+        .addEqualityGroup(attr1, sameAsAttr1)
+        .addEqualityGroup(attr2)
+        .testEquals();
+    }
+}
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