More expectations - Githubissues

kylef / Spectre

BDD Framework and test runner for Swift projects and playgrounds

BSD 2-Clause "Simplified" License

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More expectations #31

Closed ilyapuchka closed 6 years ago

ilyapuchka commented 6 years ago

beNotNil to validate that value is not nil
notThrow to validate that function does not throw
throw(_ match: (Error) -> Bool) to validate that function throws error using custom condition rather than Equatable
throw and throw(_:) expectations to better match other APIs (where to is omitted)
expect(...).to.not for not expectations, expect(...).to has now better scoped methods and code completion

kylef commented 6 years ago

Adding a not expectation type was on my list of things to implement for some time. I was thinking of adding a not "keyword" on an expectation so you could chain not to various types. I've made a start in #33. What do you think?

ilyapuchka commented 6 years ago

@kylef that's nice! Though I find it a bit confusing that things like try expect("kyle").to.to.not.to.to.to.beNil() are possible. Maybe we can use a phantom type or a separate expectation type to allow only specific methods after to or not? Maybe also not.to or just notTo would be better than to.not?