Assert that an exception is raised with a specific kind of message? about ward

[darrenburns]

Sure, you're more than welcome to open a PR for it! 😄

[darrenburns]

Hey, thanks for the note :) I realise that raises isn't as flexible as would be required in a lot of cases. I've thought about a couple of different approaches to enabling access to the exception.

My intention was to provide this pytest-esque means of accessing the exceptions raised, but I'm definitely not settled on this approach and am open to any kind of suggestion!

What I was considering, was something like this:

@test("X.parse should raise on empty inputs")
def _():
  with raises(ValueError) as err:
    X.parse("{}")
  assert "empty" in err

I don't know yet about providing something like match within the context manager itself. My initial though on it is it would be best to just provide access to the exception as in the example above, and let the user confirm that the exception is structured in the way they expect.

[thilp]

I really like your idea of just handing the exception to the user so that they can assert whatever they want. It also doesn't require to learn/remember a parameter name.

Would you like me to propose a PR for this, or do you want to give it more thought?