def test_write_raises(self):
constant_result = ConstantResult(value="untouchable!")
with pytest.raises(ValueError):
constant_result.write("nvm")
with pytest.raises(ValueError):
constant_result.write("untouchable!")
def test_write_returns_value(self):
constant_result = ConstantResult("constant value")
output = constant_result.write()
assert output == "'constant value'"
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_write_doesnt_overwrite_value(self):
constant_result = ConstantResult("untouchable!")
constant_result.write()
assert constant_result.value == "untouchable!"
assert constant_result.read("still unused") == "untouchable!"
