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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import Foundation
import XCTest
@testable import Helpers
final class ThrowingDeferTests: XCTestCase {
struct EquatableError: Error, Equatable {
let identifier = UUID()
}
final actor Worker {
let error: EquatableError?
private(set) var didRun = false
init(error: EquatableError? = nil) {
self.error = error
}
func run() throws {
self.didRun = true
if let error {
throw error
}
}
}
// MARK: - Non-Async
func testThrowingDeferWithoutThrowing() throws {
var didRunWork = false
var didRunCleanup = false
try withThrowing {
didRunWork = true
} defer: {
didRunCleanup = true
}
XCTAssertTrue(didRunWork)
XCTAssertTrue(didRunCleanup)
}
func testThrowingDeferWhenThrowingFromWork() throws {
let workError = EquatableError()
var didRunCleanup = false
XCTAssertThrowsError(try withThrowing {
throw workError
} defer: {
didRunCleanup = true
}) {
XCTAssertTrue($0 is EquatableError)
XCTAssertEqual($0 as? EquatableError, workError)
}
XCTAssertTrue(didRunCleanup)
}
func testThrowingDeferWhenThrowingFromCleanup() throws {
var didRunWork = false
let cleanupError = EquatableError()
XCTAssertThrowsError(try withThrowing {
didRunWork = true
} defer: {
throw cleanupError
}) {
XCTAssertTrue($0 is EquatableError)
XCTAssertEqual($0 as? EquatableError, cleanupError)
}
XCTAssertTrue(didRunWork)
}
func testThrowingDeferWhenThrowingFromBothClosures() throws {
var didRunWork = false
let workError = EquatableError()
let cleanupError = EquatableError()
XCTAssertThrowsError(try withThrowing {
didRunWork = true
throw workError
} defer: {
throw cleanupError
}) {
XCTAssertTrue($0 is EquatableError)
XCTAssertEqual($0 as? EquatableError, cleanupError)
}
XCTAssertTrue(didRunWork)
}
// MARK: - Async
func testAsyncThrowingDeferWithoutThrowing() async throws {
let work = Worker()
let cleanup = Worker()
try await withAsyncThrowing {
try await work.run()
} defer: {
try await cleanup.run()
}
let didRunWork = await work.didRun
let didRunCleanup = await cleanup.didRun
XCTAssertTrue(didRunWork)
XCTAssertTrue(didRunCleanup)
}
func testAsyncThrowingDeferWhenThrowingFromWork() async throws {
let workError = EquatableError()
let work = Worker(error: workError)
let cleanup = Worker()
do {
try await withAsyncThrowing {
try await work.run()
} defer: {
try await cleanup.run()
}
XCTFail("No error was thrown!")
} catch {
XCTAssertTrue(error is EquatableError)
XCTAssertEqual(error as? EquatableError, workError)
}
let didRunWork = await cleanup.didRun
let didRunCleanup = await cleanup.didRun
XCTAssertTrue(didRunWork)
XCTAssertTrue(didRunCleanup)
}
func testAsyncThrowingDeferWhenThrowingFromCleanup() async throws {
let cleanupError = EquatableError()
let work = Worker()
let cleanup = Worker(error: cleanupError)
do {
try await withAsyncThrowing {
try await work.run()
} defer: {
try await cleanup.run()
}
XCTFail("No error was thrown!")
} catch {
XCTAssertTrue(error is EquatableError)
XCTAssertEqual(error as? EquatableError, cleanupError)
}
let didRunWork = await work.didRun
let didRunCleanup = await cleanup.didRun
XCTAssertTrue(didRunWork)
XCTAssertTrue(didRunCleanup)
}
func testAsyncThrowingDeferWhenThrowingFromBothClosures() async throws {
let workError = EquatableError()
let cleanupError = EquatableError()
let work = Worker(error: workError)
let cleanup = Worker(error: cleanupError)
do {
try await withAsyncThrowing {
try await work.run()
XCTFail("No error was thrown from work!")
} defer: {
try await cleanup.run()
}
XCTFail("No error was thrown!")
} catch {
XCTAssertTrue(error is EquatableError)
XCTAssertEqual(error as? EquatableError, cleanupError)
}
let didRunWork = await work.didRun
let didRunCleanup = await cleanup.didRun
XCTAssertTrue(didRunWork)
XCTAssertTrue(didRunCleanup)
}
}
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