Implement basic unit tests for RouteHandler

In addition,
    - Refactor Segment Routing unit test mocking

Change-Id: I94cb75a8b12944264faa76301d58ee19f246d584
diff --git a/src/test/java/org/onosproject/segmentrouting/MockBridgingTableValue.java b/src/test/java/org/onosproject/segmentrouting/MockBridgingTableValue.java
new file mode 100644
index 0000000..68b0db8
--- /dev/null
+++ b/src/test/java/org/onosproject/segmentrouting/MockBridgingTableValue.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2017-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.segmentrouting;
+
+import org.onosproject.net.PortNumber;
+
+import java.util.Objects;
+
+/**
+ * Mock Bridging Table Value.
+ */
+class MockBridgingTableValue {
+    boolean popVlan;
+    PortNumber portNumber;
+
+    MockBridgingTableValue(boolean popVlan, PortNumber portNumber) {
+        this.popVlan = popVlan;
+        this.portNumber = portNumber;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof MockBridgingTableValue)) {
+            return false;
+        }
+        final MockBridgingTableValue other = (MockBridgingTableValue) obj;
+        return Objects.equals(this.popVlan, other.popVlan) &&
+                Objects.equals(this.portNumber, other.portNumber);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(popVlan, portNumber);
+    }
+}
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