def test_handles_none_as_constant(self):
constant_result = ConstantResult(value=None)
assert constant_result.read("still not used") is constant_result
def test_handles_none_as_constant(self):
constant_result = ConstantResult(None)
assert constant_result.read("still not used") is None
output = constant_result.write()
assert output == "None"
def test_read_returns_self(self):
constant_result = ConstantResult(value="hello world")
assert constant_result.read("this param isn't used") is constant_result
def test_write_doesnt_overwrite_value(self):
constant_result = ConstantResult("untouchable!")
constant_result.write()
assert constant_result.value == "untouchable!"
assert constant_result.read("still unused") == "untouchable!"