def test_strip_multiple_ws(self):
expected = " 1 2 3 4 "
assert expected == strip_multiple_ws(" 1 2 3 4 ")
string = """ 1 2
3
4 """
assert expected == strip_multiple_ws(string)
def test_strip_multiple_ws_error(self):
try:
strip_multiple_ws(None)
assert False
except:
assert True