def test_discard(self):
s = mappings.OrderedSet()
s.discard('a')
s.add('a')
assert s
s.discard('a')
assert not s
def test_add(self):
s = mappings.OrderedSet()
s.add('a')
assert 'a' in s
s.add(1)
assert 1 in s
assert list(s) == ['a', 1]
def test_clear(self):
s = mappings.OrderedSet()
s.clear()
assert len(s) == 0
s.add('a')
assert len(s) == 1
s.clear()
assert len(s) == 0
def test_remove(self):
s = mappings.OrderedSet()
with pytest.raises(KeyError):
s.remove('a')
s.add('a')
assert 'a' in s
s.remove('a')
assert 'a' not in s
def test_update(self):
s = mappings.OrderedSet()
with pytest.raises(TypeError):
s.update()
s.update(range(9))
assert len(s) == 9
def test_hash(self):
with pytest.raises(TypeError):
assert hash(mappings.OrderedSet('set'))