def test_path_is_dir():
assert which(os.getcwd()) is None
def test_abs_path_is_executable():
python = which("python")
assert python == which(python)
def test_not_in_path():
assert which("does-not-exist") is None
def test_relative_path_is_executable():
assert isinstance(which("python"), str)
assert os.path.isabs(which("python"))
def test_not_in_path():
assert_is_none(which('does-not-exist'))
def test_abs_path_is_executable():
python = which('python')
assert_equal(python, which(python))
def test_relative_path_is_executable():
assert_is_instance(which('python'), str)
assert_true(os.path.isabs(which('python')))
def test_path_is_dir():
assert_is_none(which(os.getcwd()))