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124 lines
4.3 KiB
Python
124 lines
4.3 KiB
Python
"""Test the secrets module.
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As most of the functions in secrets are thin wrappers around functions
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defined elsewhere, we don't need to test them exhaustively.
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"""
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import secrets
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import unittest
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import string
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# === Unit tests ===
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class Compare_Digest_Tests(unittest.TestCase):
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"""Test secrets.compare_digest function."""
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def test_equal(self):
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# Test compare_digest functionality with equal (byte/text) strings.
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for s in ("a", "bcd", "xyz123"):
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a = s*100
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b = s*100
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self.assertTrue(secrets.compare_digest(a, b))
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self.assertTrue(secrets.compare_digest(a.encode('utf-8'), b.encode('utf-8')))
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def test_unequal(self):
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# Test compare_digest functionality with unequal (byte/text) strings.
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self.assertFalse(secrets.compare_digest("abc", "abcd"))
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self.assertFalse(secrets.compare_digest(b"abc", b"abcd"))
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for s in ("x", "mn", "a1b2c3"):
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a = s*100 + "q"
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b = s*100 + "k"
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self.assertFalse(secrets.compare_digest(a, b))
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self.assertFalse(secrets.compare_digest(a.encode('utf-8'), b.encode('utf-8')))
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def test_bad_types(self):
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# Test that compare_digest raises with mixed types.
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a = 'abcde'
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b = a.encode('utf-8')
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assert isinstance(a, str)
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assert isinstance(b, bytes)
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self.assertRaises(TypeError, secrets.compare_digest, a, b)
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self.assertRaises(TypeError, secrets.compare_digest, b, a)
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def test_bool(self):
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# Test that compare_digest returns a bool.
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self.assertIsInstance(secrets.compare_digest("abc", "abc"), bool)
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self.assertIsInstance(secrets.compare_digest("abc", "xyz"), bool)
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class Random_Tests(unittest.TestCase):
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"""Test wrappers around SystemRandom methods."""
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def test_randbits(self):
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# Test randbits.
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errmsg = "randbits(%d) returned %d"
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for numbits in (3, 12, 30):
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for i in range(6):
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n = secrets.randbits(numbits)
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self.assertTrue(0 <= n < 2**numbits, errmsg % (numbits, n))
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def test_choice(self):
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# Test choice.
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items = [1, 2, 4, 8, 16, 32, 64]
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for i in range(10):
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self.assertTrue(secrets.choice(items) in items)
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def test_randbelow(self):
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# Test randbelow.
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for i in range(2, 10):
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self.assertIn(secrets.randbelow(i), range(i))
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self.assertRaises(ValueError, secrets.randbelow, 0)
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self.assertRaises(ValueError, secrets.randbelow, -1)
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class Token_Tests(unittest.TestCase):
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"""Test token functions."""
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def test_token_defaults(self):
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# Test that token_* functions handle default size correctly.
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for func in (secrets.token_bytes, secrets.token_hex,
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secrets.token_urlsafe):
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with self.subTest(func=func):
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name = func.__name__
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try:
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func()
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except TypeError:
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self.fail("%s cannot be called with no argument" % name)
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try:
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func(None)
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except TypeError:
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self.fail("%s cannot be called with None" % name)
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size = secrets.DEFAULT_ENTROPY
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self.assertEqual(len(secrets.token_bytes(None)), size)
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self.assertEqual(len(secrets.token_hex(None)), 2*size)
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def test_token_bytes(self):
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# Test token_bytes.
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for n in (1, 8, 17, 100):
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with self.subTest(n=n):
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self.assertIsInstance(secrets.token_bytes(n), bytes)
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self.assertEqual(len(secrets.token_bytes(n)), n)
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def test_token_hex(self):
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# Test token_hex.
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for n in (1, 12, 25, 90):
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with self.subTest(n=n):
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s = secrets.token_hex(n)
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self.assertIsInstance(s, str)
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self.assertEqual(len(s), 2*n)
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self.assertTrue(all(c in string.hexdigits for c in s))
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def test_token_urlsafe(self):
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# Test token_urlsafe.
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legal = string.ascii_letters + string.digits + '-_'
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for n in (1, 11, 28, 76):
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with self.subTest(n=n):
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s = secrets.token_urlsafe(n)
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self.assertIsInstance(s, str)
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self.assertTrue(all(c in legal for c in s))
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if __name__ == '__main__':
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unittest.main()
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