def test_iadd(self):
"""
Tests the __iadd__ method of the Catalog object.
"""
# 1 - create catalog and add it with another catalog
event1 = Event()
event2 = Event()
event3 = Event()
catalog = Catalog([event1])
catalog2 = Catalog([event2, event3])
assert len(catalog) == 1
catalog += catalog2
assert len(catalog) == 3
assert catalog.events == [event1, event2, event3]
# 3 - extend it with another Event
event4 = Event()
assert len(catalog) == 3
catalog += event4
assert len(catalog) == 4
assert catalog.events == [event1, event2, event3, event4]
# adding objects other as Catalog or Event should fails
with pytest.raises(TypeError):
catalog.__iadd__(str)
with pytest.raises(TypeError):
catalog.__iadd__((event1, event2))
with pytest.raises(TypeError):
catalog.__iadd__([event1, event2])
