diff --git a/core/api/src/test/java/org/onlab/onos/net/topology/DefaultTopologyEdgeTest.java b/core/api/src/test/java/org/onlab/onos/net/topology/DefaultTopologyEdgeTest.java
new file mode 100644
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--- /dev/null
+++ b/core/api/src/test/java/org/onlab/onos/net/topology/DefaultTopologyEdgeTest.java
@@ -0,0 +1,54 @@
+package org.onlab.onos.net.topology;
+
+import com.google.common.testing.EqualsTester;
+import org.junit.Test;
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DefaultLink;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Link;
+import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.provider.ProviderId;
+
+import static org.junit.Assert.assertEquals;
+import static org.onlab.onos.net.DeviceId.deviceId;
+import static org.onlab.onos.net.PortNumber.portNumber;
+
+/**
+ * Tests of the topology graph edge.
+ */
+public class DefaultTopologyEdgeTest {
+
+    static final DeviceId D1 = deviceId("1");
+    static final DeviceId D2 = deviceId("2");
+    static final PortNumber P1 = portNumber(1);
+    static final PortNumber P2 = portNumber(2);
+
+    static final ConnectPoint CP1 = new ConnectPoint(D1, P1);
+    static final ConnectPoint CP2 = new ConnectPoint(D2, P1);
+    static final ConnectPoint CP3 = new ConnectPoint(D2, P1);
+    static final ConnectPoint CP4 = new ConnectPoint(D1, P2);
+
+    static final DefaultTopologyVertex V1 = new DefaultTopologyVertex(D1);
+    static final DefaultTopologyVertex V2 = new DefaultTopologyVertex(D2);
+
+    static final ProviderId PID = new ProviderId("foo", "bar");
+
+    static final Link L1 = new DefaultLink(PID, CP1, CP2, Link.Type.INDIRECT);
+    static final Link L2 = new DefaultLink(PID, CP3, CP4, Link.Type.INDIRECT);
+
+    @Test
+    public void basics() {
+        DefaultTopologyEdge e = new DefaultTopologyEdge(V1, V2, L1);
+        assertEquals("incorrect src", V1, e.src());
+        assertEquals("incorrect dst", V2, e.dst());
+        assertEquals("incorrect link", L1, e.link());
+
+        new EqualsTester()
+                .addEqualityGroup(new DefaultTopologyEdge(V1, V2, L1),
+                                  new DefaultTopologyEdge(V1, V2, L1))
+                .addEqualityGroup(new DefaultTopologyEdge(V2, V1, L2),
+                                  new DefaultTopologyEdge(V2, V1, L2))
+                .testEquals();
+    }
+
+}
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