def test_oddity():
"""Test oddities of all_equal."""
# all_equal doesn't consume the iterator after the first non-equal
data = iter("ABCD")
res = all_equal(data)
assert res is False
assert list(data) == ["C", "D"]
def test_normal_equal():
"""Test all_equal."""
# all_equal with success
data = iter("AAAAA")
res = all_equal(data)
assert res is True
assert list(data) == []
# all_equal with no success
data = iter("AAAAB")
res = all_equal(data)
assert res is False
assert list(data) == []
# all_equal with empty
data = ()
res = all_equal(data)
assert res is True