def test_add_es_sh(self): self.assertEqual(tools._add_s("wish"), "wishes")
def test_add_es_ch(self): self.assertEqual(tools._add_s("church"), "churches")
def test_add_es_ss(self): self.assertEqual(tools._add_s("address"), "addresses")
def test_add_es_o(self): self.assertEqual(tools._add_s("zero"), "zeroes")
def test_add_es_x(self): self.assertEqual(tools._add_s("box"), "boxes")
def test_add_es_s(self): self.assertEqual(tools._add_s("bus"), "buses")
def test_add_s(self): self.assertEqual(tools._add_s("fedora"), "fedoras")