@Test
  public void testCheckNoParam() {
    when(mongoDbInputMeta.getJsonQuery()).thenReturn("{$unwind : 'foo'}");
    mongoDbBasicValidation.checkStep(checkStepsExtension, dataServiceMeta, log);

    verify(remarks, times(1)).add(any(CheckResultInterface.class));
  }
  @Test
  public void testCheckNoParamJsonQueryisNull() {
    mongoDbBasicValidation.checkStep(checkStepsExtension, dataServiceMeta, log);

    // make sure something was added to remarks
    verify(remarks, times(1)).add(any(CheckResultInterface.class));
  }
 @Test
 public void testCheckNoParamForDefinedOpt() {
   when(mongoDbInputMeta.getJsonQuery()).thenReturn("{$unwind : 'foo'}");
   setupMockedParamGen("testParam", "testStep");
   when(stepMeta.getName()).thenReturn("testStep");
   mongoDbBasicValidation.checkStep(checkStepsExtension, dataServiceMeta, log);
   verify(remarks, times(2)).add(any(CheckResultInterface.class));
 }
  @Test
  public void testCheckNoWarningsWithParam() {
    when(mongoDbInputMeta.getJsonQuery()).thenReturn("{$unwind : 'foo'}, {$match : ${baz}}");
    space.setVariable("baz", "foo='123'");
    mongoDbBasicValidation.checkStep(checkStepsExtension, dataServiceMeta, log);

    verify(remarks, never()).add(any(CheckResultInterface.class));
  }
  @Test
  public void testCheckJsonOutputType() {
    when(mongoDbInputMeta.getOutputJson()).thenReturn(true);

    mongoDbBasicValidation.checkStep(checkStepsExtension, dataServiceMeta, log);

    // 2 remarks added, one for json output type, one for no param set.
    verify(remarks, times(2)).add(any(CheckResultInterface.class));
  }
  @Test
  public void testCheckOkWithParam() {
    when(mongoDbInputMeta.getJsonQuery()).thenReturn("{$unwind : 'foo'}, {$match : ${testParam}}");
    space.setVariable("testParam", "{foo :'123'}");

    setupMockedParamGen("testParam", "testStep");
    when(stepMeta.getName()).thenReturn("testStep");
    mongoDbBasicValidation.checkStep(checkStepsExtension, dataServiceMeta, log);

    verify(remarks, never()).add(any(CheckResultInterface.class));
  }
 @Test
 public void testIsApplicable() {
   assertTrue(mongoDbBasicValidation.supportsStep(stepMeta, log));
 }