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