def test_dynamizer():
md = MetaData()
assert md.dynamizer is None
with pytest.raises(ArgumentError):
md.configure(dynamizer=object)
md.configure(dynamizer=DummyDynamizer)
assert md.dynamizer is DummyDynamizer
def test_tables():
md = MetaData()
assert md._tables == {}
md.add(DummyMapper('a'))
md.add(DummyMapper('b'))
md.add(DummyMapper('c'))
md.add(DummyMapper('d'))
with pytest.raises(InvalidRequestError):
md.add(DummyMapper('a'))
assert DummyMapper('a') in md
md.remove(DummyMapper('a'))
assert DummyMapper('a') not in md
assert set(md) == set(['b', 'c', 'd'])
assert len(list(md.values())) == 3
assert len(list(md.items())) == 3
md.clear()
assert len(list(md)) == 0
def test_basic():
md = MetaData()
assert md._tables == {}
assert md.connection is None
assert md.throughput is None
md.configure(connection=3, throughput=4)
assert md.connection == 3
assert md.throughput == 4
f = lambda cls: cls.__name__
md.configure(tablename_factory=f)
assert md.tablename_factory is f
md.configure()
assert md.connection == 3
assert md.throughput == 4
assert md.tablename_factory is f
a = DummyMapper('a')
md.add(a)
with pytest.raises(InvalidRequestError):
md.configure()
