use-assert-is-not-none

Collection: fixit-extra Autofix: Yes Python: Any

Discourages use of assertTrue(x is not None) and assertFalse(x is not None). Use assertIsNotNone(x) and assertIsNone(x) instead.

Message

“assertTrue” and “assertFalse” are deprecated. Use “assertIsNotNone” and “assertIsNone” instead.

References

• unittest deprecated aliases

Valid examples

self.assertIsNotNone(x)

self.assertIsNone(x)

self.assertIsNone(None)

self.assertIsNotNone(f(x))

self.assertIsNone(f(x))

self.assertIsNone(object.key)

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self.assertIsNotNone(object.key)

Invalid examples

self.assertTrue(a is not None)

Suggested fix

self.assertIsNotNone(a)

self.assertTrue(not x is None)

Suggested fix

self.assertIsNotNone(x)

self.assertTrue(f() is not None)

Suggested fix

self.assertIsNotNone(f())

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self.assertTrue(not x is not None)

Suggested fix

self.assertIsNone(x)

self.assertTrue(f(x) is not None)

Suggested fix

self.assertIsNotNone(f(x))

self.assertTrue(x is None)

Suggested fix

self.assertIsNone(x)

self.assertFalse(x is not None)

Suggested fix

self.assertIsNone(x)

self.assertFalse(not x is None)

Suggested fix

self.assertIsNone(x)

self.assertFalse(f() is not None)

Suggested fix

self.assertIsNone(f())

self.assertFalse(not x is not None)

Suggested fix

self.assertIsNotNone(x)

self.assertFalse(f(x) is not None)

Suggested fix

self.assertIsNone(f(x))

self.assertFalse(x is None)

Suggested fix

self.assertIsNotNone(x)