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How to use acquireWaitingLock method of AssertionWaitLock class

Best Nimble code snippet using AssertionWaitLock.acquireWaitingLock

Async.swift

Source:Async.swift

...11        return "\(name) at \(file):\(lineNumber)"12    }13}14internal protocol WaitLock {15    func acquireWaitingLock(fnName: String, file: String, line: UInt)16    func releaseWaitingLock()17    func isWaitingLocked() -> Bool18}19internal class AssertionWaitLock: WaitLock {20    private var currentWaiter: WaitingInfo? = nil21    init() { }22    func acquireWaitingLock(fnName: String, file: String, line: UInt) {23        let info = WaitingInfo(name: fnName, file: file, lineNumber: line)24        nimblePrecondition(25            NSThread.isMainThread(),26            "InvalidNimbleAPIUsage",27            "\(fnName) can only run on the main thread."28        )29        nimblePrecondition(30            currentWaiter == nil,31            "InvalidNimbleAPIUsage",32            "Nested async expectations are not allowed to avoid creating flaky tests.\n\n" +33            "The call to\n\t\(info)\n" +34            "triggered this exception because\n\t\(currentWaiter!)\n" +35            "is currently managing the main run loop."36        )37        currentWaiter = info38    }39    func isWaitingLocked() -> Bool {40        return currentWaiter != nil41    }42    func releaseWaitingLock() {43        currentWaiter = nil44    }45}46internal enum AwaitResult<T> {47    /// Incomplete indicates None (aka - this value hasn't been fulfilled yet)48    case Incomplete49    /// TimedOut indicates the result reached its defined timeout limit before returning50    case TimedOut51    /// BlockedRunLoop indicates the main runloop is too busy processing other blocks to trigger52    /// the timeout code.53    ///54    /// This may also mean the async code waiting upon may have never actually ran within the55    /// required time because other timers & sources are running on the main run loop.56    case BlockedRunLoop57    /// The async block successfully executed and returned a given result58    case Completed(T)59    /// When a Swift Error is thrown60    case ErrorThrown(ErrorType)61    /// When an Objective-C Exception is raised62    case RaisedException(NSException)63    func isIncomplete() -> Bool {64        switch self {65        case .Incomplete: return true66        default: return false67        }68    }69    func isCompleted() -> Bool {70        switch self {71        case .Completed(_): return true72        default: return false73        }74    }75}76/// Holds the resulting value from an asynchronous expectation.77/// This class is thread-safe at receiving an "response" to this promise.78internal class AwaitPromise<T> {79    private(set) internal var asyncResult: AwaitResult<T> = .Incomplete80    private var signal: dispatch_semaphore_t81    init() {82        signal = dispatch_semaphore_create(1)83    }84    /// Resolves the promise with the given result if it has not been resolved. Repeated calls to85    /// this method will resolve in a no-op.86    ///87    /// @returns a Bool that indicates if the async result was accepted or rejected because another88    ///          value was recieved first.89    func resolveResult(result: AwaitResult<T>) -> Bool {90        if dispatch_semaphore_wait(signal, DISPATCH_TIME_NOW) == 0 {91            self.asyncResult = result92            return true93        } else {94            return false95        }96    }97}98internal struct AwaitTrigger {99    let timeoutSource: dispatch_source_t100    let actionSource: dispatch_source_t?101    let start: () throws -> Void102}103/// Factory for building fully configured AwaitPromises and waiting for their results.104///105/// This factory stores all the state for an async expectation so that Await doesn't106/// doesn't have to manage it.107internal class AwaitPromiseBuilder<T> {108    let awaiter: Awaiter109    let waitLock: WaitLock110    let trigger: AwaitTrigger111    let promise: AwaitPromise<T>112    internal init(113        awaiter: Awaiter,114        waitLock: WaitLock,115        promise: AwaitPromise<T>,116        trigger: AwaitTrigger) {117            self.awaiter = awaiter118            self.waitLock = waitLock119            self.promise = promise120            self.trigger = trigger121    }122    func timeout(timeoutInterval: NSTimeInterval, forcefullyAbortTimeout: NSTimeInterval) -> Self {123        // = Discussion =124        //125        // There's a lot of technical decisions here that is useful to elaborate on. This is126        // definitely more lower-level than the previous NSRunLoop based implementation.127        //128        //129        // Why Dispatch Source?130        //131        //132        // We're using a dispatch source to have better control of the run loop behavior.133        // A timer source gives us deferred-timing control without having to rely as much on134        // a run loop's traditional dispatching machinery (eg - NSTimers, DefaultRunLoopMode, etc.)135        // which is ripe for getting corrupted by application code.136        //137        // And unlike dispatch_async(), we can control how likely our code gets prioritized to138        // executed (see leeway parameter) + DISPATCH_TIMER_STRICT.139        //140        // This timer is assumed to run on the HIGH priority queue to ensure it maintains the141        // highest priority over normal application / test code when possible.142        //143        //144        // Run Loop Management145        //146        // In order to properly interrupt the waiting behavior performed by this factory class,147        // this timer stops the main run loop to tell the waiter code that the result should be148        // checked.149        //150        // In addition, stopping the run loop is used to halt code executed on the main run loop.151        dispatch_source_set_timer(152            trigger.timeoutSource,153            dispatch_time(DISPATCH_TIME_NOW, Int64(timeoutInterval * Double(NSEC_PER_SEC))),154            DISPATCH_TIME_FOREVER,155            timeoutLeeway156        )157        dispatch_source_set_event_handler(trigger.timeoutSource) {158            guard self.promise.asyncResult.isIncomplete() else { return }159            let timedOutSem = dispatch_semaphore_create(0)160            let semTimedOutOrBlocked = dispatch_semaphore_create(0)161            dispatch_semaphore_signal(semTimedOutOrBlocked)162            let runLoop = CFRunLoopGetMain()163            CFRunLoopPerformBlock(runLoop, kCFRunLoopDefaultMode) {164                if dispatch_semaphore_wait(semTimedOutOrBlocked, DISPATCH_TIME_NOW) == 0 {165                    dispatch_semaphore_signal(timedOutSem)166                    dispatch_semaphore_signal(semTimedOutOrBlocked)167                    if self.promise.resolveResult(.TimedOut) {168                        CFRunLoopStop(CFRunLoopGetMain())169                    }170                }171            }172            // potentially interrupt blocking code on run loop to let timeout code run173            CFRunLoopStop(runLoop)174            let now = dispatch_time(DISPATCH_TIME_NOW, Int64(forcefullyAbortTimeout * Double(NSEC_PER_SEC)))175            let didNotTimeOut = dispatch_semaphore_wait(timedOutSem, now) != 0176            let timeoutWasNotTriggered = dispatch_semaphore_wait(semTimedOutOrBlocked, 0) == 0177            if didNotTimeOut && timeoutWasNotTriggered {178                if self.promise.resolveResult(.BlockedRunLoop) {179                    CFRunLoopStop(CFRunLoopGetMain())180                }181            }182        }183        return self184    }185    /// Blocks for an asynchronous result.186    ///187    /// @discussion188    /// This function must be executed on the main thread and cannot be nested. This is because189    /// this function (and it's related methods) coordinate through the main run loop. Tampering190    /// with the run loop can cause undesireable behavior.191    ///192    /// This method will return an AwaitResult in the following cases:193    ///194    /// - The main run loop is blocked by other operations and the async expectation cannot be195    ///   be stopped.196    /// - The async expectation timed out197    /// - The async expectation succeeded198    /// - The async expectation raised an unexpected exception (objc)199    /// - The async expectation raised an unexpected error (swift)200    ///201    /// The returned AwaitResult will NEVER be .Incomplete.202    func wait(fnName: String = __FUNCTION__, file: String = __FILE__, line: UInt = __LINE__) -> AwaitResult<T> {203        waitLock.acquireWaitingLock(204            fnName,205            file: file,206            line: line)207        let capture = NMBExceptionCapture(handler: ({ exception in208            self.promise.resolveResult(.RaisedException(exception))209        }), finally: ({210            self.waitLock.releaseWaitingLock()211        }))212        capture.tryBlock {213            do {214                try self.trigger.start()215            } catch let error {216                self.promise.resolveResult(.ErrorThrown(error))217            }...

acquireWaitingLock

Using AI Code Generation

1let lock = AssertionWaitLock()2lock.acquireWaitingLock()3lock.releaseWaitingLock()4let lock = AssertionWaitLock()5lock.acquireWaitingLock()6lock.releaseWaitingLock()7let lock = AssertionWaitLock()8lock.acquireWaitingLock()9lock.releaseWaitingLock()

acquireWaitingLock

Using AI Code Generation

1import Foundation2let lock = AssertionWaitLock()3lock.acquireWaitingLock()4import Foundation5let lock = AssertionWaitLock()6lock.releaseWaitingLock()7import Foundation8let lock = AssertionWaitLock()9lock.acquireWaitingLock()10import Foundation11let lock = AssertionWaitLock()12lock.releaseWaitingLock()13import Foundation14let lock = AssertionWaitLock()15lock.acquireWaitingLock()16import Foundation17let lock = AssertionWaitLock()18lock.releaseWaitingLock()19import Foundation20let lock = AssertionWaitLock()21lock.acquireWaitingLock()22import Foundation23let lock = AssertionWaitLock()24lock.releaseWaitingLock()25import Foundation26let lock = AssertionWaitLock()27lock.acquireWaitingLock()28import Foundation29let lock = AssertionWaitLock()30lock.releaseWaitingLock()31import Foundation32let lock = AssertionWaitLock()33lock.acquireWaitingLock()34import Foundation35let lock = AssertionWaitLock()36lock.releaseWaitingLock()37import Foundation38let lock = AssertionWaitLock()39lock.acquireWaitingLock()40import Foundation41let lock = AssertionWaitLock()42lock.releaseWaitingLock()

acquireWaitingLock

Using AI Code Generation

1import Foundation2class AssertionWaitLock {3    let lock = NSCondition()4    func acquireWaitingLock() {5        lock.lock()6        while isLocked {7            lock.wait()8        }9        lock.unlock()10    }11}12import Foundation13class AssertionWaitLock {14    let lock = NSCondition()15    func acquireWaitingLock() {16        lock.lock()17        while isLocked {18            lock.wait()19        }20        lock.unlock()21    }22}23import Foundation24class AssertionWaitLock {25    let lock = NSCondition()26    func acquireWaitingLock() {27        lock.lock()28        while isLocked {29            lock.wait()30        }31        lock.unlock()32    }33}

acquireWaitingLock

Using AI Code Generation

1func test() {2    let lock = AssertionWaitLock()3    lock.acquireWaitingLock()4    lock.release()5}6func test() {7    let lock = AssertionWaitLock()8    lock.acquireWaitingLock()9    lock.release()10}11func test() {12    let lock = AssertionWaitLock()13    lock.acquireWaitingLock()14    lock.release()15}16func test() {17    let lock = AssertionWaitLock()18    lock.acquireWaitingLock()19    lock.release()20}21func test() {22    let lock = AssertionWaitLock()23    lock.acquireWaitingLock()24    lock.release()25}26func test() {27    let lock = AssertionWaitLock()28    lock.acquireWaitingLock()29    lock.release()30}31func test() {32    let lock = AssertionWaitLock()33    lock.acquireWaitingLock()34    lock.release()35}36func test() {37    let lock = AssertionWaitLock()38    lock.acquireWaitingLock()39    lock.release()40}41func test() {42    let lock = AssertionWaitLock()43    lock.acquireWaitingLock()44    lock.release()45}46func test() {47    let lock = AssertionWaitLock()48    lock.acquireWaitingLock()49    lock.release()50}51func test() {

acquireWaitingLock

Using AI Code Generation

1import Foundation2let lock = AssertionWaitLock()3lock.acquireWaitingLock()4print("Lock acquired")5lock.releaseWaitingLock()6print("Lock released")

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