66 lines
1.6 KiB
Python
Executable File
66 lines
1.6 KiB
Python
Executable File
#!/usr/bin/python -S
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#
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# Copyright 2014 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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fastrand_test.py: Tests for _fastrand extension module.
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"""
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import unittest
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import _fastrand # module under test
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BIT_WIDTHS = [8, 16, 32, 64]
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class FastRandTest(unittest.TestCase):
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def testRandbits64(self):
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for n in BIT_WIDTHS:
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#print '== %d' % n
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for p1 in [0.1, 0.5, 0.9]:
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#print '-- %f' % p1
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for i in xrange(5):
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r = _fastrand.randbits(p1, n)
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# Rough sanity check
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self.assertLess(r, 2 ** n)
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# Visual check
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#b = bin(r)
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#print b
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#print b.count('1')
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def testRandbits64_EdgeCases(self):
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for n in BIT_WIDTHS:
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r = _fastrand.randbits(0.0, n)
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self.assertEqual(0, r)
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for n in BIT_WIDTHS:
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r = _fastrand.randbits(1.0, n)
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self.assertEqual(2 ** n - 1, r)
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def testRandbitsError(self):
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r = _fastrand.randbits(-1, 64)
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# TODO: Should probably raise exceptions
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self.assertEqual(None, r)
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r = _fastrand.randbits(0.0, 65)
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self.assertEqual(None, r)
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if __name__ == '__main__':
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unittest.main()
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