def test_getitem():
x = OrderedSet([1, 2, -1])
assert x[0] == 1
assert x[1] == 2
assert x[2] == -1
with pytest.raises(IndexError):
x[3]
from ordered_set_37 import OrderedSet x = OrderedSet([1, 2, 3]) x.add(5) z = 5 + x[2]
def test_init_empty():
x = OrderedSet()
assert len(x) == 0
x.add(2)
assert len(x) == 1
def test_eq():
x = OrderedSet([1, 2, 3])
y = OrderedSet([1, 2, 3])
assert x == y
assert x is not y
def test_repr():
x = OrderedSet([1, 2, 3])
assert repr(x) == "<OrderedSet {1, 2, 3}>"
def test_str():
x = OrderedSet([1, 2, 3])
assert str(x) == "{1, 2, 3}"
def test_iter():
for x in OrderedSet([1]):
assert x == 1
def test_len():
x = OrderedSet([1])
assert len(x) == 1
def test_remove_raises_missing_element():
x = OrderedSet()
with pytest.raises(KeyError):
x.remove(1)
def test_remove():
x = OrderedSet([1])
x.remove(1)
assert not x
def test_discard_ignores_missing_element():
x = OrderedSet()
x.discard(1) # This does not raise
def test_discard():
x = OrderedSet([1, 2, -1])
x.discard(2)
assert list(x) == [1, -1]
def test_add():
x = OrderedSet([1, 2, -1, "bar"])
x.add(0)
assert list(x) == [1, 2, -1, "bar", 0]