Add prod three challenge

online_judges/prod_three/test_prod_three.py

@@ -0,0 +1,21 @@
+from nose.tools import assert_equal, assert_raises
+
+
+class TestProdThree(object):
+
+    def test_prod_three(self):
+        solution = Solution()
+        assert_raises(TypeError, solution.max_prod_three, None)
+        assert_raises(ValueError, solution.max_prod_three, [1, 2])
+        assert_equal(solution.max_prod_three([5, -2, 3]), -30)
+        assert_equal(solution.max_prod_three([5, -2, 3, 1, -1, 4]), 60)
+        print('Success: test_prod_three')
+
+
+def main():
+    test = TestProdThree()
+    test.test_prod_three()
+
+
+if __name__ == '__main__':
+    main()