Negative Logic Example

NegativeLogic.java

public List<Class> buildClassHierarchy(Class cls) {
    List<Class> classHierarchy = new ArrayList<>();

    while (!Object.class.equals(cls) && cls != null) {
        classHierarchy.add(cls);
        cls = cls.getSuperclass();
    }
    return classHierarchy;
}
...
@Test
public void shouldReturnClassHiearchy() {
    List<Class> classHierarchy = logic.buildClassHierarchy(MyMap.class);
    assertThat(classHierarchy).contains(MyMap.class, HashMap.class, AbstractMap.class);
}