def test_expect(self):
res_var = Err("error")
self.assertRaises(SystemExit, res_var.expect, "message")
try:
res_var.expect("message")
except SystemExit as e:
self.assertEqual(str(e), "message")
def test_map(self):
res_var = Ok(["1", "2", "3"])
length = res_var.map(len)
self.assertEqual(length, Ok(3))
res_var = Err("error")
length = res_var.map(len)
self.assertEqual(length, Err("error"))
def test_unwrap(self):
res_var = Ok(10)
self.assertEqual(res_var.unwrap(), 10)
res_var = Ok("10")
self.assertEqual(res_var.unwrap(), "10")
res_var = Ok(None)
self.assertEqual(res_var.unwrap(), None)
res_var = Ok(Err(RuntimeError("error")))
self.assertEqual(res_var.unwrap(), Err(RuntimeError("error")))
res_var = Err("error")
self.assertRaises(SystemExit, res_var.unwrap)
def test_map_or_else(self):
res_var = Ok(["1", "2", "3"])
length = res_var.map_or_else(len, lambda: 0)
self.assertEqual(length, Ok(3))
res_var = Err("error")
length = res_var.map_or_else(len, lambda: 0)
self.assertEqual(length, Ok(0))
def test_unwrap_or(self):
res_var = Ok(10)
self.assertEqual(res_var.unwrap_or(0), 10)
res_var = Ok(True)
self.assertEqual(res_var.unwrap_or(False), True)
res_var = Err("error")
self.assertEqual(res_var.unwrap_or(0), 0)
def load_message(message_file_path: Path) -> Result[str, Exception]:
try:
if not message_file_path.is_file():
raise FileNotFoundError(
f"{message_file_path} is not a valid file path")
with message_file_path.open('r') as f:
line = f.readline()
return Ok(str(line))
except Exception as e:
return Err(e)
def test_ok(self):
res_var = Ok(["1", "2", "3"])
self.assertEqual(res_var.ok(), Some(["1", "2", "3"]))
res_var = Err("error")
self.assertEqual(res_var.ok(), Nothing())
def test_is_err(self):
res_var = Ok(10)
self.assertEqual(res_var.is_err(), False)
res_var = Err("error")
self.assertEqual(res_var.is_err(), True)
def test_unwrap_or_else(self):
res_var = Ok(10)
self.assertEqual(res_var.unwrap_or_else(lambda: 0), 10)
res_var = Err("error")
self.assertEqual(res_var.unwrap_or_else(lambda: 0), 0)
def test_unwrap_err(self):
res_var = Ok(10)
self.assertRaises(SystemExit, res_var.unwrap_err)
res_var = Err("error")
self.assertEqual(res_var.unwrap_err(), "error")
def test_ok_or_else(self):
some_var = Some(10)
self.assertEqual(some_var.ok_or_else(lambda: 0), Ok(10))
some_var = Nothing()
self.assertEqual(some_var.ok_or_else(lambda: 0), Err(0))