@Test
public void testString() {

  source = new NetworkTableEntrySource(eventBus,
      origin -> new MockExceptionWitness(eventBus, origin),
      osf,
      testingNtManager,
      STRING_PATH,
      NetworkTableEntrySource.Types.STRING);
  assertTrue("Socket could not be updated", source.updateOutputSockets());
  assertEquals("Expected Strings to be equal -- they are not equal",
      TEST_STRING, source.getOutputSockets().get(0).getValue().get());
}