"""Unit tests for numbers.py."""

import math

import operator

import unittest

from numbers import Complex, Real, Rational, Integral

from numbers import Number

from test import test_support

class TestNumbers(unittest.TestCase):

    def test_int(self):

        self.failUnless(issubclass(int, Integral))

        self.failUnless(issubclass(int, Complex))

        self.assertEqual(7, int(7).real)

        self.assertEqual(0, int(7).imag)

        self.assertEqual(7, int(7).conjugate())

        self.assertEqual(7, int(7).numerator)

        self.assertEqual(1, int(7).denominator)

    def test_long(self):

        self.failUnless(issubclass(long, Integral))

        self.failUnless(issubclass(long, Complex))

        self.assertEqual(7, long(7).real)

        self.assertEqual(0, long(7).imag)

        self.assertEqual(7, long(7).conjugate())

        self.assertEqual(7, long(7).numerator)

        self.assertEqual(1, long(7).denominator)

    def test_float(self):

        self.failIf(issubclass(float, Rational))

        self.failUnless(issubclass(float, Real))

        self.assertEqual(7.3, float(7.3).real)

        self.assertEqual(0, float(7.3).imag)

        self.assertEqual(7.3, float(7.3).conjugate())

    def test_complex(self):

        self.failIf(issubclass(complex, Real))

        self.failUnless(issubclass(complex, Complex))

        c1, c2 = complex(3, 2), complex(4,1)

        # XXX: This is not ideal, but see the comment in math_trunc().

        self.assertRaises(AttributeError, math.trunc, c1)

        self.assertRaises(TypeError, float, c1)

        self.assertRaises(TypeError, int, c1)

def test_main():

    test_support.run_unittest(TestNumbers)

if __name__ == "__main__":

    unittest.main()