async def test_filterfalse_too_few_args():
"""Check that filterfalse raises TypeError when too few args."""
with pytest.raises(TypeError):
await aitertools.anext(aitertools.filterfalse())
with pytest.raises(TypeError):
await aitertools.anext(aitertools.filterfalse(None))
async def test_filterfalse_predicate_not_callable():
"""Check that filterfalse raise TypeError when predicate not callable."""
with pytest.raises(TypeError):
await aitertools.anext(aitertools.filterfalse([], [1]))
async def test_filterfalse_too_many_args():
"""Check that filterfalse raises TypeError when too many args."""
with pytest.raises(TypeError):
await aitertools.anext(aitertools.filterfalse(1, 2, 3))
async def test_filterfalse_defaults_to_bool():
"""Check that filterfalse uses the Truthy/Falsy values by default."""
assert (await aitertools.alist(
aitertools.filterfalse(None, [True, False, False, True, False, True])
)) == [False, False, False]
async def test_filterfalse_removes_elements_true_predicate():
"""Check that filterfalse only returns items if the predicate is False."""
assert (await aitertools.alist(
aitertools.filterfalse(lambda x: x % 2 == 0, range(6))
)) == [1, 3, 5]
