@Test
public void nonExistentAttributeFailTest() {

    TOExecutionResult executionResult = new PomFile("ATT").execution(transformedAppFolder, transformationContext);
    assertEquals(executionResult.getType(), TOExecutionResult.Type.ERROR);
    assertEquals(executionResult.getException().getClass(), TransformationOperationException.class);
    assertEquals(executionResult.getException().getMessage(), "Transformation context attribute ATT does not exist");
}