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68 lines
2.5 KiB
Python
68 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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import unittest2
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from rsa._compat import b
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from rsa.transform import int2bytes, bytes2int, _int2bytes
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class Test_int2bytes(unittest2.TestCase):
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def test_accuracy(self):
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self.assertEqual(int2bytes(123456789), b('\x07[\xcd\x15'))
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self.assertEqual(_int2bytes(123456789), b('\x07[\xcd\x15'))
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def test_codec_identity(self):
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self.assertEqual(bytes2int(int2bytes(123456789, 128)), 123456789)
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self.assertEqual(bytes2int(_int2bytes(123456789, 128)), 123456789)
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def test_chunk_size(self):
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self.assertEqual(int2bytes(123456789, 6), b('\x00\x00\x07[\xcd\x15'))
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self.assertEqual(int2bytes(123456789, 7),
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b('\x00\x00\x00\x07[\xcd\x15'))
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self.assertEqual(_int2bytes(123456789, 6),
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b('\x00\x00\x07[\xcd\x15'))
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self.assertEqual(_int2bytes(123456789, 7),
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b('\x00\x00\x00\x07[\xcd\x15'))
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def test_zero(self):
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self.assertEqual(int2bytes(0, 4), b('\x00') * 4)
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self.assertEqual(int2bytes(0, 7), b('\x00') * 7)
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self.assertEqual(int2bytes(0), b('\x00'))
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self.assertEqual(_int2bytes(0, 4), b('\x00') * 4)
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self.assertEqual(_int2bytes(0, 7), b('\x00') * 7)
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self.assertEqual(_int2bytes(0), b('\x00'))
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def test_correctness_against_base_implementation(self):
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# Slow test.
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values = [
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1 << 512,
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1 << 8192,
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1 << 77,
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]
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for value in values:
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self.assertEqual(int2bytes(value), _int2bytes(value),
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"Boom %d" % value)
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self.assertEqual(bytes2int(int2bytes(value)),
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value,
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"Boom %d" % value)
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self.assertEqual(bytes2int(_int2bytes(value)),
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value,
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"Boom %d" % value)
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def test_raises_OverflowError_when_chunk_size_is_insufficient(self):
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self.assertRaises(OverflowError, int2bytes, 123456789, 3)
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self.assertRaises(OverflowError, int2bytes, 299999999999, 4)
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self.assertRaises(OverflowError, _int2bytes, 123456789, 3)
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self.assertRaises(OverflowError, _int2bytes, 299999999999, 4)
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def test_raises_ValueError_when_negative_integer(self):
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self.assertRaises(ValueError, int2bytes, -1)
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self.assertRaises(ValueError, _int2bytes, -1)
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def test_raises_TypeError_when_not_integer(self):
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self.assertRaises(TypeError, int2bytes, None)
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self.assertRaises(TypeError, _int2bytes, None)
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