Integration Tests: add MainThreadMonitor to ensure main thread is not blocked
#2463
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| // | ||
| // Copyright RevenueCat Inc. All Rights Reserved. | ||
| // | ||
| // Licensed under the MIT License (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://opensource.org/licenses/MIT | ||
| // | ||
| // MainThreadMonitor.swift | ||
| // | ||
| // Created by Nacho Soto on 5/1/23. | ||
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| import Foundation | ||
| @testable import RevenueCat | ||
| import XCTest | ||
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| final class MainThreadMonitor { | ||
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| private let queue: DispatchQueue | ||
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| init() { | ||
| self.queue = .init(label: "com.revenuecat.MainThreadMonitor") | ||
| Logger.verbose("Initializing \(type(of: self)) with a threshold of \(Self.threshold.seconds) seconds") | ||
| } | ||
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| deinit { | ||
| Logger.verbose("Stopping \(type(of: self))") | ||
| } | ||
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| func run() { | ||
| self.queue.async { [weak self] in | ||
| while self != nil { | ||
| let semaphore = DispatchSemaphore(value: 0) | ||
| DispatchQueue.main.async { | ||
| semaphore.signal() | ||
| } | ||
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| let deadline = DispatchTime.now() + Self.threshold | ||
| let result = semaphore.wait(timeout: deadline) | ||
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| precondition( | ||
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There was a problem hiding this comment. I couldn't make this a |
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| result != .timedOut, | ||
| "Main thread was blocked for more than \(Self.threshold.seconds) seconds" | ||
| ) | ||
| } | ||
| } | ||
| } | ||
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| private static let threshold: DispatchTimeInterval = .seconds(1) | ||
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| } | ||
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This is a cool idea. Any thoughts on using this in other integration tests (not only backend integration tests)?
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This is the base class for all integration tests.