'Test to string methods for Bool/Int vars.'

def test_mip_print(self):

    self.assertEqual(repr(self.x_bool), "Bool(1,    1,    'x')")
    self.assertEqual(repr(self.B_int), "Int(2,    3,    'B')")
    x = Bool()
    B = Int(2, 3)
    self.assertEqual(repr(x), 'Bool(1,    1)')
    self.assertEqual(repr(B), 'Int(2,    3)')
