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  • Committer: Olivier Tilloy
  • Date: 2011-05-24 09:18:41 UTC
  • mto: This revision was merged to the branch mainline in revision 355.
  • Revision ID: olivier@tilloy.net-20110524091841-fk710gtozm8j3ts5
Do not fail to parse rationals stored as '0/0'.
In the crazy world of EXIF metadata, this means a null fraction, i.e. 0/1.

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test/rational.py
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        else:
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            self.fail('Denominator is not read-only.')
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    def test_match_string(self):
 
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        self.assertEqual(Rational.match_string('4/3'), (4, 3))
 
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        self.assertEqual(Rational.match_string('-4/3'), (-4, 3))
 
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        self.assertEqual(Rational.match_string('0/3'), (0, 3))
 
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        self.assertEqual(Rational.match_string('0/0'), (0, 0))
 
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        self.assertRaises(ValueError, Rational.match_string, '+3/5')
 
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        self.assertRaises(ValueError, Rational.match_string, '3 / 5')
 
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        self.assertRaises(ValueError, Rational.match_string, '3/-5')
 
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        self.assertRaises(ValueError, Rational.match_string, 'invalid')
 
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    def test_from_string(self):
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        self.assertEqual(Rational.from_string('4/3'), Rational(4, 3))
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        self.assertEqual(Rational.from_string('-4/3'), Rational(-4, 3))
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        self.assertRaises(ValueError, Rational.from_string, '3 / 5')
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        self.assertRaises(ValueError, Rational.from_string, '3/-5')
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        self.assertRaises(ValueError, Rational.from_string, 'invalid')
 
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        self.assertRaises(ZeroDivisionError, Rational.from_string, '1/0')
 
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        self.assertRaises(ZeroDivisionError, Rational.from_string, '0/0')
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    def test_to_string(self):
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        self.assertEqual(str(Rational(3, 5)), '3/5')