def test_maybe_map(self):
l = Maybe("lower")
lmapped = l.map(lambda s: s.upper())
assert lmapped == Maybe("LOWER")
assert lmapped == "LOWER"
assert lmapped.or_else_get("Nothing") == "LOWER"
assert lmapped.or_else(lambda: "Nothing") == "LOWER"
assert lmapped.or_else_raise(lambda: ValueError("Nothing!")) == "LOWER"
def test_maybe_is_present(self):
assert Maybe(None).is_present is False
assert Maybe("Something").is_present
def test_maybe_or_else_raise(self):
with pytest.raises(ValueError):
assert Maybe(None).or_else_raise(lambda: ValueError("No value"))
assert (Maybe("Something").or_else_raise(
lambda: ValueError("No value")) == "Something")
def test_maybe_or_else_get(self):
assert Maybe(None).or_else_get("Not None") == "Not None"
assert Maybe("Something").or_else_get("Nothing") == "Something"
def test_maybe_or_else(self):
assert Maybe(None).or_else(lambda: "Not None") == "Not None"
assert Maybe("Something").or_else(lambda: "Nothing") == "Something"
def test_maybe_equals(self):
assert Maybe("Something") == "Something"
assert Maybe("Something") == Maybe("Something")
assert Maybe(None) == Maybe(None)
assert Maybe(None) != Maybe("Something")
def test_maybe_value(self):
assert Maybe(None).value is None
assert Maybe("Something").value == "Something"