def test_check_attr(self):
types = [None, True, 1, "", "string", [], (), {}]
# pass: empty list
self.assertIsNone(PXML.check_attr([]))
# pass: list of 2-tuple (tuple elements are strings)
for element in permutations([t for t in types if isinstance(t, str)], 2):
self.assertIsNone(PXML.check_attr([element]))
# fail: non-list
for element in [t for t in types if not isinstance(t, list)]:
with self.assertRaises(TypeError):
PXML.check_attr(element)
# fail: 1 element list (element is not a 2-tuple of strings)
for element in permutations(types, 1):
with self.assertRaises(TypeError):
PXML.check_attr(list(element))
# fail: 2 element list (elements are not a 2-tuple of strings)
for element in permutations(types, 2):
with self.assertRaises(TypeError):
PXML.check_attr(list(element))
# fail: 3 element list (elements are not a 2-tuple of strings)
for element in permutations(types, 3):
with self.assertRaises(TypeError):
PXML.check_attr(list(element))
# fail: list of 1-tuple
for element in permutations(types, 1):
with self.assertRaises(TypeError):
PXML.check_attr([element])
# fail: list of 2-tuple (tuple elements are non-strings)
for element in permutations([t for t in types if not isinstance(t, str)], 2):
with self.assertRaises(TypeError):
PXML.check_attr([element])
# fail: list of 3-tuple
for element in permutations(types, 3):
with self.assertRaises(TypeError):
PXML.check_attr([element])
