def test1(self): self.assertEqual(lib.count_evens([2, 1, 2, 3, 4]), 3)
def test7(self): self.assertEqual(lib.count_evens([2]), 1)
def test8(self): self.assertEqual(lib.count_evens([2, 5, 12]), 2)
def test5(self): self.assertEqual(lib.count_evens([11, 9, 0, 1]), 1)
def test6(self): self.assertEqual(lib.count_evens([2, 11, 9, 0]), 2)
def test3(self): self.assertEqual(lib.count_evens([1, 3, 5]), 0)
def test4(self): self.assertEqual(lib.count_evens([]), 0)
def test2(self): self.assertEqual(lib.count_evens([2, 2, 0]), 3)