diff --git a/src/test/java/net/onrc/onos/intent/runtime/PathCalcRuntimeModuleTest.java b/src/test/java/net/onrc/onos/intent/runtime/PathCalcRuntimeModuleTest.java
new file mode 100644
index 0000000..972da69
--- /dev/null
+++ b/src/test/java/net/onrc/onos/intent/runtime/PathCalcRuntimeModuleTest.java
@@ -0,0 +1,187 @@
+package net.onrc.onos.intent.runtime;
+
+import net.floodlightcontroller.core.module.FloodlightModuleContext;
+import net.floodlightcontroller.core.module.FloodlightModuleException;
+import net.onrc.onos.datagrid.IDatagridService;
+import net.onrc.onos.datagrid.IEventChannel;
+import net.onrc.onos.datagrid.IEventChannelListener;
+import net.onrc.onos.intent.*;
+import net.onrc.onos.intent.Intent.IntentState;
+import net.onrc.onos.intent.IntentOperation.Operator;
+import net.onrc.onos.intent.persist.PersistIntent;
+import net.onrc.onos.ofcontroller.networkgraph.INetworkGraphListener;
+import net.onrc.onos.ofcontroller.networkgraph.INetworkGraphService;
+import net.onrc.onos.registry.controller.IControllerRegistryService;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.api.easymock.PowerMock;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import java.util.Collection;
+
+import static org.easymock.EasyMock.*;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+
+import org.hamcrest.Matchers;
+
+/**
+ * @author Ray Milkey (ray@onlab.us)
+ */
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(PathCalcRuntimeModule.class)
+public class PathCalcRuntimeModuleTest {
+    private FloodlightModuleContext modContext;
+    private IDatagridService datagridService;
+    private INetworkGraphService networkGraphService;
+    private IControllerRegistryService controllerRegistryService;
+    private PersistIntent persistIntent;
+
+    @SuppressWarnings("unchecked")
+    @Before
+    public void setUp() throws Exception {
+        final MockNetworkGraph graph = new MockNetworkGraph();
+        graph.createSampleTopology1();
+
+        datagridService = createMock(IDatagridService.class);
+        networkGraphService = createMock(INetworkGraphService.class);
+        controllerRegistryService = createMock(IControllerRegistryService.class);
+        modContext = createMock(FloodlightModuleContext.class);
+        final IEventChannel eventChannel = createMock(IEventChannel.class);
+        persistIntent = PowerMock.createMock(PersistIntent.class);
+
+        PowerMock.expectNew(PersistIntent.class,
+                anyObject(IControllerRegistryService.class),
+                anyObject(INetworkGraphService.class)).andReturn(persistIntent);
+
+        expect(modContext.getServiceImpl(IDatagridService.class))
+                .andReturn(datagridService).once();
+        expect(modContext.getServiceImpl(INetworkGraphService.class))
+                .andReturn(networkGraphService).once();
+        expect(modContext.getServiceImpl(IControllerRegistryService.class))
+                .andReturn(controllerRegistryService).once();
+        expect(persistIntent.getKey()).andReturn(1L).anyTimes();
+        expect(persistIntent.persistIfLeader(eq(1L),
+                anyObject(IntentOperationList.class))).andReturn(true)
+                .anyTimes();
+
+        expect(networkGraphService.getNetworkGraph()).andReturn(graph)
+                .anyTimes();
+        networkGraphService.registerNetworkGraphListener(
+                anyObject(INetworkGraphListener.class));
+        expectLastCall();
+
+        expect(datagridService.createChannel("onos.pathintent",
+                Long.class, IntentOperationList.class))
+                .andReturn(eventChannel).once();
+
+        expect(datagridService.addListener(
+                eq("onos.pathintent_state"),
+                anyObject(IEventChannelListener.class),
+                eq(Long.class),
+                eq(IntentStateList.class)))
+                .andReturn(eventChannel).once();
+
+        replay(datagridService);
+        replay(networkGraphService);
+        replay(modContext);
+        replay(controllerRegistryService);
+        PowerMock.replay(persistIntent, PersistIntent.class);
+    }
+
+    @After
+    public void tearDown() {
+        verify(datagridService);
+        verify(networkGraphService);
+        verify(modContext);
+        verify(controllerRegistryService);
+        PowerMock.verify(persistIntent, PersistIntent.class);
+    }
+
+    /**
+     * Test the result of executing a path calculation on an
+     * Intent Operation List which contains a path that references a
+     * non-existent switch.
+     * <p/>
+     * A 3 path list is created where one of the paths references a switch
+     * that is not in the topology.  The test checks that the resulting
+     * Operation List has entries for the 2 correct paths, and that the
+     * high level intents contain a proper error entry for the bad path.
+     */
+    @Test
+    public void testInvalidSwitchName() throws FloodlightModuleException {
+
+        final Long LOCAL_PORT = 0xFFFEL;
+        final String BAD_SWITCH_INTENT_NAME = "No Such Switch Intent";
+
+        // create shortest path intents
+        final IntentOperationList opList = new IntentOperationList();
+        opList.add(Operator.ADD,
+                new ShortestPathIntent(BAD_SWITCH_INTENT_NAME, 111L, 12L,
+                        LOCAL_PORT, 2L, 21L, LOCAL_PORT));
+        opList.add(Operator.ADD,
+                new ShortestPathIntent("2", 1L, 14L, LOCAL_PORT, 4L, 41L,
+                        LOCAL_PORT));
+        opList.add(Operator.ADD,
+                new ShortestPathIntent("3", 2L, 23L, LOCAL_PORT, 3L, 32L,
+                        LOCAL_PORT));
+
+        // compile high-level intent operations into low-level intent
+        // operations (calculate paths)
+        final PathCalcRuntimeModule runtime = new PathCalcRuntimeModule();
+        runtime.init(modContext);
+        runtime.startUp(modContext);
+        final IntentOperationList pathIntentOpList =
+                runtime.executeIntentOperations(opList);
+        assertThat(pathIntentOpList, notNullValue());
+
+        final IntentMap highLevelIntents = runtime.getHighLevelIntents();
+        assertThat(highLevelIntents, notNullValue());
+
+        final Collection<Intent> allIntents = highLevelIntents.getAllIntents();
+        assertThat(allIntents, notNullValue());
+
+        //  One intent had an error and should not create a path list entry
+        assertThat(pathIntentOpList, hasSize(opList.size() - 1));
+
+        //  Should be a high level intent for each operation
+        assertThat(opList, hasSize(allIntents.size()));
+
+        // Check that we got a high level intent for each operation
+        assertThat(allIntents,
+                   hasItem(Matchers.<Intent>
+                           hasProperty("id", equalTo("3"))));
+        assertThat(allIntents,
+                   hasItem(Matchers.<Intent>
+                           hasProperty("id", equalTo("2"))));
+        assertThat(allIntents,
+                   hasItem(Matchers.<Intent>
+                           hasProperty("id", equalTo(BAD_SWITCH_INTENT_NAME))));
+
+        //  Check that the non existent switch was NACKed
+        final Intent intentForBadSwitch =
+                highLevelIntents.getIntent(BAD_SWITCH_INTENT_NAME);
+        assertThat(intentForBadSwitch, notNullValue());
+        assertThat(intentForBadSwitch.getState(),
+                is(equalTo(IntentState.INST_NACK)));
+
+        //  Check that switch 2 was correctly processed
+        final Intent intentForSwitch2 = highLevelIntents.getIntent("2");
+        assertThat(intentForSwitch2, notNullValue());
+        assertThat(intentForSwitch2.getState(),
+                is(equalTo(IntentState.INST_REQ)));
+
+        //  Check that switch 3 was correctly processed
+        final Intent intentForSwitch3 = highLevelIntents.getIntent("3");
+        assertThat(intentForSwitch3, notNullValue());
+        assertThat(intentForSwitch3.getState(),
+                is(equalTo(IntentState.INST_REQ)));
+
+    }
+
+
+}