Nimble extensions that make unit testing with RxSwift easier 🎉
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RxSwift includes a really nifty little library called RxBlocking which provides convenience functions for peeking in on
Observable instances. Check is a blocking call, hence the name.
But writing code to check an
Observable's value is sooooo tedious:
let result = try! observable.toBlocking().first() expect(result) == 42
RxNimble, we've added Nimble extension for
Observables, so the code above can be rewritten as:
expect(observable).first == 42
It's also possible to pass a timeout to the blocking operators:
expect(observable).first(timeout: 3) == 42
This extension is also available for all Traits (e.g.
Maybe) and other types conforming to
If on the other hand you'd rather use RxTest instead of
RxBlocking, you can do it by specifying RxNimble's
RxTest subspec. With RxTest you can have more powerful tests, checking a stream as a whole instead of being limited to
array (while the last 2 implicitly require the stream to have completed).
That means RxTest allows you to verify the occurrence of multiple
completed events at specific virtual times:
expect(subject).events(scheduler: scheduler, disposeBag: disposeBag) .to(equal([ Recorded.next(5, "Hello"), Recorded.next(10, "World"), Recorded.completed(100) ]))
You may also verify specific error types:
expect(imageSubject).events(scheduler: scheduler, disposeBag: disposeBag) .to(equal([ Recorded.error(5, ImageError.invalidImage) ]))
Add to the tests target in your Podfile:
pod 'RxNimble' # same as RxNimble/RxBlocking
pod 'RxNimble/RxTest' # installs RxTest instead of RxBlocking
pod 'RxNimble', subspecs: ['RxBlocking', 'RxTest'] # installs both dependencies
pod install and that's it!
Add to your Cartfile.private:
carthage update --cache-builds then drag & drop from the Carthage/Builds folder into your project either or both of:
equalFirst was removed in favor of a more natural Nimble matcher API style.
Very very very rarely the Swift compiler gets confused about the different types and you need to use the original