ONOS-2186 - GUI Topo Overlay - (WIP)
- added unit tests for BiLink, BiLinkMap, Mod, and LinkHighlight.

Change-Id: I247103af2713731b20564718064eeda03d030df7
diff --git a/core/api/src/test/java/org/onosproject/ui/topo/BiLinkMapTest.java b/core/api/src/test/java/org/onosproject/ui/topo/BiLinkMapTest.java
new file mode 100644
index 0000000..17fcc22
--- /dev/null
+++ b/core/api/src/test/java/org/onosproject/ui/topo/BiLinkMapTest.java
@@ -0,0 +1,76 @@
+/*
+ * 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.ui.topo;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Unit tests for {@link BiLinkMap}.
+ */
+public class BiLinkMapTest extends BiLinkTestBase {
+
+
+    private ConcreteLink clink;
+    private ConcreteLinkMap linkMap;
+
+    @Before
+    public void setUp() {
+        linkMap = new ConcreteLinkMap();
+    }
+
+    @Test
+    public void basic() {
+        assertEquals("wrong map size", 0, linkMap.size());
+        assertTrue("unexpected links", linkMap.biLinks().isEmpty());
+    }
+
+    @Test
+    public void addSameLinkTwice() {
+        linkMap.add(LINK_AB);
+        assertEquals("wrong map size", 1, linkMap.size());
+        clink = linkMap.biLinks().iterator().next();
+        assertEquals("wrong link one", LINK_AB, clink.one());
+        assertNull("unexpected link two", clink.two());
+
+        linkMap.add(LINK_AB);
+        assertEquals("wrong map size", 1, linkMap.size());
+        clink = linkMap.biLinks().iterator().next();
+        assertEquals("wrong link one", LINK_AB, clink.one());
+        assertNull("unexpected link two", clink.two());
+    }
+
+    @Test
+    public void addPairOfLinks() {
+        linkMap.add(LINK_AB);
+        assertEquals("wrong map size", 1, linkMap.size());
+        clink = linkMap.biLinks().iterator().next();
+        assertEquals("wrong link one", LINK_AB, clink.one());
+        assertNull("unexpected link two", clink.two());
+
+        linkMap.add(LINK_BA);
+        assertEquals("wrong map size", 1, linkMap.size());
+        clink = linkMap.biLinks().iterator().next();
+        assertEquals("wrong link one", LINK_AB, clink.one());
+        assertEquals("wrong link two", LINK_BA, clink.two());
+    }
+}