@Test(expected = SubstepsConfigurationException.class)
public void testMissingSubStepCausesFailure() {

    final String feature = getResourcePath( "features/error.feature");
    final String tag = "@bug_missing_sub_step_impl";
    final String substeps = getResourcePath( "substeps/error.substeps");
    final JunitFeatureRunner runner = new JunitFeatureRunner();
    final List<Class<?>> stepImplsList = new ArrayList<>();
    stepImplsList.add(TestStepImplementations.class);
    runner.init(this.getClass(), stepImplsList, feature, tag, substeps, null);
}