Cucumber: "Given" step must test something

I'm reworking my tests into Cucumber, but I must still use some user-provided information (namely, an account that the tests should be run against):

Given a valid account
开发者_如何学PythonWhen I ...
Then I ...

Because of this, I must check the validity of the provided account during the "Given" step, and fail the scenario if it's invalid. What would be the correct way of doing so?

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The usual way I've seen of going about this is to run in a temporary environment where you can mock a valid user. So in your Given step you should create a new, valid user. Then run the rest of your test and remove the user after the test exits.