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serhiy-storchakaserhiy-storchaka
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Issue #25983: Added tests for multi-argument type().
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‎Lib/test/test_builtin.py‎

Lines changed: 155 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1668,6 +1668,161 @@ def __del__(self):
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self.assertEqual(["before", "after"], out.decode().splitlines())
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class TestType(unittest.TestCase):
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def test_new_type(self):
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A = type('A', (), {})
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self.assertEqual(A.__name__, 'A')
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self.assertEqual(A.__qualname__, 'A')
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self.assertEqual(A.__module__, __name__)
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self.assertEqual(A.__bases__, (object,))
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self.assertIs(A.__base__, object)
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x = A()
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self.assertIs(type(x), A)
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self.assertIs(x.__class__, A)
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class B:
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def ham(self):
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return 'ham%d' % self
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C = type('C', (B, int), {'spam': lambda self: 'spam%s' % self})
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self.assertEqual(C.__name__, 'C')
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self.assertEqual(C.__qualname__, 'C')
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self.assertEqual(C.__module__, __name__)
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self.assertEqual(C.__bases__, (B, int))
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self.assertIs(C.__base__, int)
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self.assertIn('spam', C.__dict__)
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self.assertNotIn('ham', C.__dict__)
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x = C(42)
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self.assertEqual(x, 42)
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self.assertIs(type(x), C)
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self.assertIs(x.__class__, C)
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self.assertEqual(x.ham(), 'ham42')
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self.assertEqual(x.spam(), 'spam42')
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self.assertEqual(x.to_bytes(2, 'little'), b'\x2a\x00')
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def test_type_new_keywords(self):
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class B:
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def ham(self):
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return 'ham%d' % self
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C = type.__new__(type,
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name='C',
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bases=(B, int),
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dict={'spam': lambda self: 'spam%s' % self})
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self.assertEqual(C.__name__, 'C')
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self.assertEqual(C.__qualname__, 'C')
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self.assertEqual(C.__module__, __name__)
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self.assertEqual(C.__bases__, (B, int))
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self.assertIs(C.__base__, int)
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self.assertIn('spam', C.__dict__)
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self.assertNotIn('ham', C.__dict__)
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def test_type_name(self):
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for name in 'A', '\xc4', '\U0001f40d', 'B.A', '42', '':
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with self.subTest(name=name):
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A = type(name, (), {})
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self.assertEqual(A.__name__, name)
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self.assertEqual(A.__qualname__, name)
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self.assertEqual(A.__module__, __name__)
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with self.assertRaises(ValueError):
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type('A\x00B', (), {})
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with self.assertRaises(ValueError):
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type('A\udcdcB', (), {})
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with self.assertRaises(TypeError):
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type(b'A', (), {})
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C = type('C', (), {})
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for name in 'A', '\xc4', '\U0001f40d', 'B.A', '42', '':
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with self.subTest(name=name):
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C.__name__ = name
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self.assertEqual(C.__name__, name)
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self.assertEqual(C.__qualname__, 'C')
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self.assertEqual(C.__module__, __name__)
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A = type('C', (), {})
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with self.assertRaises(ValueError):
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A.__name__ = 'A\x00B'
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self.assertEqual(A.__name__, 'C')
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with self.assertRaises(ValueError):
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A.__name__ = 'A\udcdcB'
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self.assertEqual(A.__name__, 'C')
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with self.assertRaises(TypeError):
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A.__name__ = b'A'
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self.assertEqual(A.__name__, 'C')
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def test_type_qualname(self):
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A = type('A', (), {'__qualname__': 'B.C'})
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self.assertEqual(A.__name__, 'A')
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self.assertEqual(A.__qualname__, 'B.C')
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self.assertEqual(A.__module__, __name__)
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with self.assertRaises(TypeError):
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type('A', (), {'__qualname__': b'B'})
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self.assertEqual(A.__qualname__, 'B.C')
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A.__qualname__ = 'D.E'
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self.assertEqual(A.__name__, 'A')
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self.assertEqual(A.__qualname__, 'D.E')
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with self.assertRaises(TypeError):
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A.__qualname__ = b'B'
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self.assertEqual(A.__qualname__, 'D.E')
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def test_type_doc(self):
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for doc in 'x', '\xc4', '\U0001f40d', 'x\x00y', b'x', 42, None:
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A = type('A', (), {'__doc__': doc})
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self.assertEqual(A.__doc__, doc)
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with self.assertRaises(UnicodeEncodeError):
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type('A', (), {'__doc__': 'x\udcdcy'})
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A = type('A', (), {})
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self.assertEqual(A.__doc__, None)
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for doc in 'x', '\xc4', '\U0001f40d', 'x\x00y', 'x\udcdcy', b'x', 42, None:
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A.__doc__ = doc
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self.assertEqual(A.__doc__, doc)
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def test_bad_args(self):
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with self.assertRaises(TypeError):
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type()
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with self.assertRaises(TypeError):
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type('A', ())
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with self.assertRaises(TypeError):
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type('A', (), {}, ())
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with self.assertRaises(TypeError):
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type('A', (), dict={})
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with self.assertRaises(TypeError):
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type('A', [], {})
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with self.assertRaises(TypeError):
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type('A', (), types.MappingProxyType({}))
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with self.assertRaises(TypeError):
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type('A', (None,), {})
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with self.assertRaises(TypeError):
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type('A', (bool,), {})
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with self.assertRaises(TypeError):
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type('A', (int, str), {})
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def test_bad_slots(self):
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with self.assertRaises(TypeError):
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type('A', (), {'__slots__': b'x'})
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with self.assertRaises(TypeError):
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type('A', (int,), {'__slots__': 'x'})
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with self.assertRaises(TypeError):
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type('A', (), {'__slots__': ''})
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with self.assertRaises(TypeError):
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type('A', (), {'__slots__': '42'})
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with self.assertRaises(TypeError):
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type('A', (), {'__slots__': 'x\x00y'})
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with self.assertRaises(ValueError):
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type('A', (), {'__slots__': 'x', 'x': 0})
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with self.assertRaises(TypeError):
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type('A', (), {'__slots__': ('__dict__', '__dict__')})
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with self.assertRaises(TypeError):
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type('A', (), {'__slots__': ('__weakref__', '__weakref__')})
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class B:
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pass
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with self.assertRaises(TypeError):
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type('A', (B,), {'__slots__': '__dict__'})
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with self.assertRaises(TypeError):
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type('A', (B,), {'__slots__': '__weakref__'})
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def load_tests(loader, tests, pattern):
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from doctest import DocTestSuite
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tests.addTest(DocTestSuite(builtins))

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