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#!/usr/bin/python

'''Test cases for std::pair container conversions'''

import sys
import unittest

from sample import PairUser

class ExtendedPairUser(PairUser):
    def __init__(self):
        PairUser.__init__(self)
        self.create_pair_called = False

    def createPair(self):
        self.create_pair_called = True
        return (7, 13)

class PairConversionTest(unittest.TestCase):
    '''Test case for std::pair container conversions'''

    def testReimplementedVirtualMethodCall(self):
        '''Test if a Python override of a virtual method is correctly called from C++.'''
        pu = ExtendedPairUser()
        pair = pu.callCreatePair()
        self.assert_(pu.create_pair_called)
        self.assertEqual(type(pair), tuple)
        self.assertEqual(type(pair[0]), int)
        self.assertEqual(type(pair[1]), int)
        self.assertEqual(pair, (7, 13))

    def testPrimitiveConversionInsideContainer(self):
        '''Test primitive type conversion inside conversible std::pair container.'''
        cpx0 = complex(1.2, 3.4)
        cpx1 = complex(5.6, 7.8)
        cp = PairUser.createComplexPair(cpx0, cpx1)
        self.assertEqual(type(cp), tuple)
        self.assertEqual(type(cp[0]), complex)
        self.assertEqual(type(cp[1]), complex)
        self.assertEqual(cp, (cpx0, cpx1))

    def testSumPair(self):
        '''Test method that sums the items of a pair using values of the types expected by C++ (int and double)'''
        pu = PairUser()
        pair = (3, 7.13)
        result = pu.sumPair(pair)
        self.assertEqual(result, sum(pair))

    def testSumPairDifferentTypes(self):
        '''Test method that sums the items of a pair using values of types different from the ones expected by C++ (int and double)'''
        pu = PairUser()
        pair = (3.3, 7)
        result = pu.sumPair(pair)
        self.assertNotEqual(result, sum(pair))
        self.assertEqual(result, int(pair[0]) + pair[1])

    def testConversionInBothDirections(self):
        '''Test converting a pair from Python to C++ and the other way around.'''
        pu = PairUser()
        pair = (3, 5)
        pu.setPair(pair)
        result = pu.getPair()
        self.assertEqual(result, pair)

    def testConversionInBothDirectionsWithSimilarContainer(self):
        '''Test converting a list, instead of the expected tuple, from Python to C++ and the other way around.'''
        pu = PairUser()
        pair = [3, 5]
        pu.setPair(pair)
        result = pu.getPair()
        self.assertNotEqual(result, pair)
        self.assertEqual(result, list(pair))

if __name__ == '__main__':
    unittest.main()