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139 lines
4.6 KiB
Python
139 lines
4.6 KiB
Python
#
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# SelfTest/Math/test_Numbers.py: Self-test for Numbers module
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#
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# ===================================================================
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#
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# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ===================================================================
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"""Self-test for Math.Numbers"""
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import unittest
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from Crypto.SelfTest.st_common import list_test_cases
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from Crypto.Math.Numbers import Natural
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def Naturals(*arg):
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return map(Natural, arg)
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class TestNatural(unittest.TestCase):
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def test_conversion_from_int(self):
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a = Natural(23)
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self.assertEqual(23, a)
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self.assertEqual(23, int(a))
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b = Natural(0xFFFF)
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self.assertEqual(0xFFFF, b)
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self.assertEqual(0xFFFF, int(b))
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def test_conversion_from_bytes(self):
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a = Natural.from_bytes("\x00")
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self.assertEqual(0, a)
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b = Natural.from_bytes("\xFF\xFF")
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self.assertEqual(0xFFFF, b)
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def test_conversion_to_bytes(self):
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a = Natural(0x17)
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self.assertEqual("\x17", a.to_bytes())
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b = Natural(0xFFFF)
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self.assertEqual("\xFF\xFF", b.to_bytes())
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def test_negative_number_is_not_natural(self):
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self.assertRaises(ValueError, Natural, -1)
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def test_floating_number_is_not_natural(self):
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self.assertRaises(ValueError, Natural, 1.0)
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def test_equality(self):
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# Test Natural==Natural and Natural==int
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a, b, c = Naturals(89, 89, 90)
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self.failUnless(a == b)
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self.failUnless(a == 89)
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self.failIf(a == c)
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self.failIf(a == 90)
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def test_inequality(self):
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# Test Natural!=Natural and Natural!=int
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a, b, c = Naturals(89, 89, 90)
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self.failUnless(a != c)
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self.failUnless(a != 90)
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self.failIf(a != b)
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self.failIf(a != 89)
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def test_less_than(self):
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# Test Natural<Natural and Natural<int
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a, b, c = Naturals(13, 13, 14)
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self.failUnless(a < c)
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self.failUnless(a < 14)
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self.failIf(a < b)
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self.failIf(a < 13)
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def test_addition(self):
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# Test Natural+Natural and Natural+int
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a, b = Naturals(7, 90)
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self.assertEqual(a + b, 97)
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self.assertEqual(a + 90, 97)
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self.assertEqual(a + (-7), 0)
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self.assertRaises(ValueError, lambda: a + (-8))
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def test_subtraction(self):
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# Test Natural-Natural and Natural-int
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a, b = Naturals(7, 90)
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self.assertEqual(b - a, 83)
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self.assertEqual(b - 7, 83)
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self.assertEqual(b - (-7), 97)
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self.assertRaises(ValueError, lambda: a - b)
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self.assertRaises(ValueError, lambda: a - 90)
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def test_remainder(self):
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# Test Natural%Natural and Natural%int
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a, b = Naturals(23, 5)
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self.assertEqual(a % b, 3)
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self.assertEqual(a % 5, 3)
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self.assertRaises(ZeroDivisionError, lambda: a % 0)
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def test_power(self):
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# Test Natural**Natural, Natural**int and int**Natural
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a, b = Naturals(3, 4)
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self.assertEqual(a ** b, 81)
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self.assertEqual(a ** 4, 81)
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self.assertEqual(3 ** b, 81)
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self.assertRaises(ValueError, lambda: a ** -1)
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def get_tests(config={}):
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tests = []
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tests += list_test_cases(TestNatural)
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return tests
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if __name__ == '__main__':
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suite = lambda: unittest.TestSuite(get_tests())
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unittest.main(defaultTest='suite')
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