def test_dataset2(self): self.assertEquals(task.find_last('aaaa', 'c'), -1)
def test_dataset1(self): self.assertEquals(task.find_last('aaaa', 'a'), 3)
def test_dataset3(self): self.assertEquals(task.find_last('aaab', 'b'), 3)
def test_dataset2(self): self.assertEquals(task.find_last('aaaa', 'c'),-1)
def test_dataset1(self): self.assertEquals(task.find_last('aaaa', 'a'),3)
def test_dataset3(self): self.assertEquals(task.find_last('aaab', 'b'),3)