Swift Quick/Nimble - Wait for predicate to match

Question

I'm trying to convert the following block of code to Quick/Nimble with no success whatsoever

XCTWaiter().wait(for: [XCTNSPredicateExpectation(predicate: NSPredicate(format: "height == 0"), 
                                                 object: vc.myView.frame)], 
                 timeout: 1)

I tried the following but the test does not pass

waitUntil(timeout: 2) { done in
    expect(vc.myView.frame.height).to(equal(0))
    done()
}

Thx in advance for your help!

Hi, what is the purpose of using a 2 sec timeout? Also, what is the error? — Mikhail Glotov, Dec 05 '19 at 08:07
Well it was previously set to 1 and its purpose is to wait for a dropdown view to close, thus the `height == 0` — Nikolai, Dec 05 '19 at 08:51
It would be nice to see more code unless my answer has helped you already :) — Mikhail Glotov, Dec 05 '19 at 09:34

score 3 · Answer 1 · answered Dec 05 '19 at 08:13

3

I think "toEventually" is what you are looking for. Here is the example:

expect(vc.myView.frame.height).toEventually(equal(0), timeout: 2)

More to check here: https://github.com/Quick/Nimble#asynchronous-expectations

answered Dec 05 '19 at 08:13

Mikhail Glotov

336
3
9

score 3 · Accepted Answer · answered Oct 21 '20 at 15:53

3

You can also set the timeout globally, e.g. once your tests start, so it applies for all toEventually calls:

Nimble >= 9.0.0

Nimble.AsyncDefaults.timeout = .seconds(2)

Nimble < 9.0.0

Nimble.AsyncDefaults.Timeout = 2

answered Oct 21 '20 at 15:53

blackjacx

9,011
7
45
56

Swift Quick/Nimble - Wait for predicate to match

2 Answers2

Nimble >= 9.0.0

Nimble < 9.0.0