def test_one_failure5():
# Test that a failing iterator doesn't raise a SystemError
with pytest.raises(_hf.FailNext.EXC_TYP, match=_hf.FailNext.EXC_MSG):
one(_hf.FailNext(offset=1))
def test_one_failure6():
# generator without items
with pytest.raises(ValueError):
one(i for i in [])
def test_one_failure2():
# empty iterable
with pytest.raises(ValueError):
one([])
def test_one_failure3():
# more than 1 element
with pytest.raises(ValueError) as exc:
one([T(1), T(2)])
assert "'T(1), T(2)[, ...]'" in str(exc.value)
def test_one_failure1():
with pytest.raises(_hf.FailIter.EXC_TYP, match=_hf.FailIter.EXC_MSG):
one(_hf.FailIter())
def test_one_normal4():
# generator with one item
assert one(i for i in [T(0)]) == T(0)
def test_one_normal3():
assert one({T('o'): T(10)}) == T('o')
def test_one_normal2():
assert one('a') == 'a'
def test_one_normal1():
assert one([T(0)]) == T(0)