def test_container_adding_component_twice_is_ok(
model_with_container: MockModel):
"""Defensive check that adding the same component twice is OK."""
empty_container = model_with_container.empty_container
component = Component(name="Component")
empty_container += component
empty_container += component
assert len(empty_container.components) == 1
def test_container_add_constructed_component(model_with_container: MockModel):
"""Verify behaviour when adding a newly constructed Container."""
empty_container = model_with_container.empty_container
component = Component(name="Component")
empty_container += component
assert component in empty_container.components
assert component.id != ""
assert component.model is model_with_container
assert component.parent is empty_container
def test_container_adding_component_with_same_name_fails(
model_with_container: MockModel, ):
"""Check that adding a component with the same name as an existing one fails."""
empty_container = model_with_container.empty_container
empty_container.add_component(name="Component")
with pytest.raises(ValueError,
match="Component with name .* already exists"):
empty_container.add_component(name="Component")
with pytest.raises(ValueError,
match="Component with name .* already exists"):
empty_container += Component(name="Component")
def test_model_add_component_must_have_parent(empty_model: Model):
"""Ensure that Model rejects adding Components that aren't within a Container."""
component = Component(name="c1")
with pytest.raises(ValueError, match="Element with name .* has no parent"):
empty_model += component