Unable to get the name of the input when using getByRole while testing with testing-library
You can see from the test output that your input element does not have aria-label. This causes the accessibility name to be an empty string "".
As per docs I think you want one of the following
<TextField inputProps={{ 'aria-label': 'code' }} />or
<TextField label="code" />Note
It is a good rule of thumb to try make it work without relying on aria properties first--and then using them if there is no other way. Read more