def test_function_signature(self):
c = Cursor("test_data")
p = Parser()
data = "do_something :: Int String = Float"
found, node = p.function_signature(data, c)
self.assertTrue(found)
self.assertIsNotNone(node)
self.assertEqual("do_something", node.name)
self.assertEqual(2, len(node.inputs))
self.assertEqual(1, len(node.outputs))
