def test_equal_2(self):
     self.assertEqual(find_GCF(8, 20), 4)
 def test_equal_4(self):
     self.assertEqual(find_GCF(100, 100), 100)
 def test_equal_1(self):
     self.assertEqual(find_GCF(2, 4), 2)
 def test_equal_3(self):
     self.assertEqual(find_GCF(5, 13), 1)