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moll / js-must

An assertion library for JavaScript and Node.js with a friendly BDD syntax (awesome.must.be.true()). It ships with many expressive matchers and is test runner and framework agnostic. Follows RFC 2119 with its use of MUST. Good stuff and well tested.
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Custom Changes #32

Closed saulshanabrook closed 9 years ago

saulshanabrook commented 9 years ago

Is it currently possible to change the data midway through an assertion?

For example I have a want to resolve a promise (using eventually) then select the value key from the object returned, then convert that JSON string into a JS object, then do a check on it.

moll commented 9 years ago

Hey,

You could do that via any regular way you handle promises. Like:

promise.then((p) => JSON.parse(p.field)).must.then.eql({name: "John"})

Would that work?

saulshanabrook commented 9 years ago

Yep! I would also have to handle if the promise failed, right?

moll commented 9 years ago

Not necessarily. If you pass the whole promise to something that waits on it, it'll blow up if your JSON parsing failed. Must uses the same mechanism — it just rejects the promise if the assertion failed. I wrote a small example here: https://github.com/moll/js-must/issues/22#issuecomment-111840555

saulshanabrook commented 9 years ago

Awesome, thank you!

moll commented 9 years ago

Yippie!