Advanced return type (tuple) - how to use?

[DieterPi]

According to the docs TESTed has support for the immutable sequence tuple. Does this mean I can test if my pupils have a function which properly returns tuples instead of lists?

I've tried (mimicking the full example)

- expression: RGB( (0,128,128) )
  return: "tuple( (255, 127, 127) )"

instead of

- expression: RGB( (0,128,128) )
  return:
  - 255
  - 127
  - 127

since the last example would also approve of a list with the values...

[niknetniko]

Does this mean I can test if my pupils have a function which properly returns tuples instead of lists?

Yes, this is possible.

I've tried (mimicking the full example)

It seems these docs are slightly out-of-date: they are missing a required YAML tag. My apologies for that.

There are a few equivalent ways of doing this:

- expression: RGB((0, 128, 128))
  return: !expression "(255, 127, 127)"
- expression: RGB((0, 128, 128))
  return: !expression "tuple((255, 127, 127))"
- expression: RGB((0, 128, 128))
  return: !tuple [255, 127, 127]
- expression: RGB((0, 128, 128))
  return: !tuple
    - 255
    - 127
    - 127

You are correct that your last example will accept both list and tuple in Python (and e.g. List and array in Java).

[niknetniko]

It seems this has been resolved, so I'll close the issue.

(A small tip: consider posting questions like this in our Discussions in the future, this makes it more discoverable for others as well)