#!/usr/bin/python
# -*- coding: iso-8859-2 -*-
#
# points.py
from math import sqrt

class Point:
    def __init__(self,x=0,y=0):
        self.x=x
        self.y=y
    def __str__(self):
            return "(%s,%s)" % (self.x,self.y)
    def __repr__(self):
        return "Point(%s,%s)" % (self.x,self.y)
    def __eq__(self,other):
        if self.x==other.x and self.y==other.y:
            return True
        else:
            return False
    def __ne_(_self,other):
        return not self==other

    def __add__(self,other):
        resx=self.x+other.x
        resy=self.y+other.y
        return Point(resx,resy)
    def __sub__(self,other):
        resx=self.x-other.x
        resy=self.y-other.y
        return Point(resx,resy)
    def __mul__(self,other):
        res=self.x*other.x+self.y*other.y
        return res
    def cross(self,other):
        res=self.x*other.y-self.y*other.x
        return res
    def length(self):
        len=sqrt(self.x*self.x+self.y*self.y)
        return len

#############################################

#!/usr/bin/python
# -*- coding: iso-8859-2 -*-
#
# points_test.py

import unittest
from points import *

class TestPoints(unittest.TestCase):
    def setUp(self): pass
    def test_str(self):
        self.assertEqual(str(Point(3,5)),"(3,5)")
    def test_repr(self):
        self.assertEqual(repr(Point(2,1)),"Point(2,1)")
    def test_eq(self):
        self.assertEquals(eq(Point(1,2),Point(1,2)),True)



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