@Test
public void attributeTest() throws IOException, XmlPullParserException {

    Model pomModel = getOriginalPomModel("pom.xml");
    Mockito.when(transformationContext.get("ATT")).thenReturn(pomModel);
    Mockito.when(transformationContext.contains("ATT")).thenReturn(true);
    PomGetPackaging pomGetPackaging = new PomGetPackaging("ATT");
    assertEquals(pomGetPackaging.getDescription(), "Retrieve the packaging of specified Maven POM module");
    TUExecutionResult executionResult = pomGetPackaging.execution(transformedAppFolder, transformationContext);
    assertEquals(executionResult.getType(), TUExecutionResult.Type.VALUE);
    assertEquals(executionResult.getValue(), "jar");
}