def test_is_strong_dependency(self): """Test the behaviour of is_strong method.""" dep_a = Dependency(BaseEntity("Base"), CHECK) dep_b = Dependency(BaseEntity("Base"), REQUIRE) dep_c = Dependency(BaseEntity("Base"), REQUIRE_WEAK) self.assertTrue(dep_a.is_strong()) self.assertTrue(dep_b.is_strong()) self.assertFalse(dep_c.is_strong())