Only use networktables when we need it

core/src/test/java/edu/wpi/grip/core/operations/network/MockGripNetworkModule.java

@@ -1,6 +1,5 @@
 package edu.wpi.grip.core.operations.network;
 
-import edu.wpi.grip.core.operations.network.networktables.TestingNTManager;
 import edu.wpi.grip.core.operations.network.ros.MockROSManager;
 import edu.wpi.grip.core.operations.network.ros.ROSNetworkPublisherFactory;
 
@@ -25,6 +24,6 @@ protected void configure() {
 
     bind(MapNetworkReceiverFactory.class)
         .annotatedWith(Names.named("ntManager"))
-        .to(TestingNTManager.class);
+        .to(MockNetworkReceiver.class);
   }
 }

core/src/test/java/edu/wpi/grip/core/operations/network/MockNetworkReceiver.java

@@ -0,0 +1,9 @@
+package edu.wpi.grip.core.operations.network;
+
+public class MockNetworkReceiver implements MapNetworkReceiverFactory {
+
+  @Override
+  public NetworkReceiver create(String path) {
+    return null;
+  }
+}

core/src/test/java/edu/wpi/grip/core/operations/network/networktables/TestingNTManager.java

@@ -12,7 +12,7 @@
  * This class encapsulates the way we map various settings to the global NetworkTables state.
  */
 @Singleton
-public class TestingNTManager extends NTManager {
+public class TestingNTManager extends NTManager implements AutoCloseable {
 
   private static final Logger logger = Logger.getLogger(TestingNTManager.class.getName());
 
@@ -33,4 +33,9 @@ public TestingNTManager() {
     NetworkTable.initialize();
   }
 
+  @Override
+  public void close() {
+    NetworkTable.shutdown();
+  }
+
 }

core/src/test/java/edu/wpi/grip/core/sources/NetworkTableEntrySourceTest.java

@@ -10,6 +10,7 @@
 import edu.wpi.first.wpilibj.networktables.NetworkTablesJNI;
 
 import org.junit.After;
+import org.junit.Before;
 import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
@@ -20,9 +21,9 @@ public class NetworkTableEntrySourceTest {
 
   private final EventBus eventBus;
   private final MockOutputSocketFactory osf;
-  private final TestingNTManager testingNtManager;
 
   private NetworkTableEntrySource source;
+  private TestingNTManager testingNtManager;
 
   private static final double TEST_NUMBER = 13.13;
   private static final String TEST_STRING = "Some test string";
@@ -33,6 +34,10 @@ public class NetworkTableEntrySourceTest {
   public NetworkTableEntrySourceTest() {
     eventBus = new EventBus();
     osf = new MockOutputSocketFactory(eventBus);
+  }
+
+  @Before
+  public void setUp() {
     testingNtManager = new TestingNTManager();
 
     NetworkTablesJNI.putBoolean(BOOLEAN_PATH, true);
@@ -41,8 +46,9 @@ public NetworkTableEntrySourceTest() {
   }
 
   @After
-  public void cleanup() {
+  public void tearDown() {
     eventBus.post(new SourceRemovedEvent(source));
+    testingNtManager.close();
   }
 
   @Test