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Merge pull request ReactiveCocoa#30 from ReactiveCocoa/any-binding-ta…
…rget Introduce `BindingTarget` (class).
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| import Result | ||
| import Nimble | ||
| import Quick | ||
| @testable import ReactiveSwift | ||
|
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| class UnidirectionalBindingSpec: QuickSpec { | ||
| override func spec() { | ||
| describe("BindingTarget") { | ||
| var token: Lifetime.Token! | ||
| var lifetime: Lifetime! | ||
| var target: BindingTarget<Int>! | ||
| var value: Int! | ||
|
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| beforeEach { | ||
| token = Lifetime.Token() | ||
| lifetime = Lifetime(token) | ||
| target = BindingTarget(lifetime: lifetime, setter: { value = $0 }) | ||
| value = nil | ||
| } | ||
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| it("should pass through the lifetime") { | ||
| expect(target.lifetime).to(beIdenticalTo(lifetime)) | ||
| } | ||
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| it("should trigger the supplied setter") { | ||
| expect(value).to(beNil()) | ||
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| target.consume(1) | ||
| expect(value) == 1 | ||
| } | ||
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| it("should accept bindings from properties") { | ||
| expect(value).to(beNil()) | ||
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| let property = MutableProperty(1) | ||
| target <~ property | ||
| expect(value) == 1 | ||
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| property.value = 2 | ||
| expect(value) == 2 | ||
| } | ||
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| it("should not deadlock on the same queue") { | ||
| target = BindingTarget(on: .main, | ||
| lifetime: lifetime, | ||
| setter: { value = $0 }) | ||
|
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| let property = MutableProperty(1) | ||
| target <~ property | ||
| expect(value) == 1 | ||
| } | ||
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| it("should not deadlock even if the value is originated from the same queue indirectly") { | ||
| let key = DispatchSpecificKey<Void>() | ||
| DispatchQueue.main.setSpecific(key: key, value: ()) | ||
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| let mainQueueCounter = Atomic(0) | ||
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| let setter: (Int) -> Void = { | ||
| value = $0 | ||
| mainQueueCounter.modify { $0 += DispatchQueue.getSpecific(key: key) != nil ? 1 : 0 } | ||
| } | ||
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| target = BindingTarget(on: .main, | ||
| lifetime: lifetime, | ||
| setter: setter) | ||
|
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| let scheduler: QueueScheduler | ||
| if #available(OSX 10.10, *) { | ||
| scheduler = QueueScheduler() | ||
| } else { | ||
| scheduler = QueueScheduler(queue: DispatchQueue(label: "com.reactivecocoa.ReactiveSwift.UnidirectionalBindingSpec")) | ||
| } | ||
|
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| let property = MutableProperty(1) | ||
| target <~ property.producer | ||
| .start(on: scheduler) | ||
| .observe(on: scheduler) | ||
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| expect(value).toEventually(equal(1)) | ||
| expect(mainQueueCounter.value).toEventually(equal(1)) | ||
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| property.value = 2 | ||
| expect(value).toEventually(equal(2)) | ||
| expect(mainQueueCounter.value).toEventually(equal(2)) | ||
| } | ||
| } | ||
| } | ||
| } |