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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Async Algorithms open source project
//
// Copyright (c) 2022 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
//
//===----------------------------------------------------------------------===//
import XCTest
fileprivate enum _XCTAssertion {
case equal
case equalWithAccuracy
case identical
case notIdentical
case greaterThan
case greaterThanOrEqual
case lessThan
case lessThanOrEqual
case notEqual
case notEqualWithAccuracy
case `nil`
case notNil
case unwrap
case `true`
case `false`
case fail
case throwsError
case noThrow
var name: String? {
switch(self) {
case .equal: return "XCTAssertEqual"
case .equalWithAccuracy: return "XCTAssertEqual"
case .identical: return "XCTAssertIdentical"
case .notIdentical: return "XCTAssertNotIdentical"
case .greaterThan: return "XCTAssertGreaterThan"
case .greaterThanOrEqual: return "XCTAssertGreaterThanOrEqual"
case .lessThan: return "XCTAssertLessThan"
case .lessThanOrEqual: return "XCTAssertLessThanOrEqual"
case .notEqual: return "XCTAssertNotEqual"
case .notEqualWithAccuracy: return "XCTAssertNotEqual"
case .`nil`: return "XCTAssertNil"
case .notNil: return "XCTAssertNotNil"
case .unwrap: return "XCTUnwrap"
case .`true`: return "XCTAssertTrue"
case .`false`: return "XCTAssertFalse"
case .throwsError: return "XCTAssertThrowsError"
case .noThrow: return "XCTAssertNoThrow"
case .fail: return nil
}
}
}
fileprivate enum _XCTAssertionResult {
case success
case expectedFailure(String?)
case unexpectedFailure(Swift.Error)
var isExpected: Bool {
switch self {
case .unexpectedFailure(_): return false
default: return true
}
}
func failureDescription(_ assertion: _XCTAssertion) -> String {
let explanation: String
switch self {
case .success: explanation = "passed"
case .expectedFailure(let details?): explanation = "failed: \(details)"
case .expectedFailure(_): explanation = "failed"
case .unexpectedFailure(let error): explanation = "threw error \"\(error)\""
}
if let name = assertion.name {
return "\(name) \(explanation)"
} else {
return explanation
}
}
}
private func _XCTEvaluateAssertion(_ assertion: _XCTAssertion, message: () -> String, file: StaticString, line: UInt, expression: () throws -> _XCTAssertionResult) {
let result: _XCTAssertionResult
do {
result = try expression()
} catch {
result = .unexpectedFailure(error)
}
switch result {
case .success:
return
default:
XCTFail("\(result.failureDescription(assertion)) - \(message())", file: file, line: line)
}
}
fileprivate func _XCTAssertEqual<T>(_ expression1: () throws -> T, _ expression2: () throws -> T, _ equal: (T, T) -> Bool, _ message: () -> String, file: StaticString = #filePath, line: UInt = #line) {
_XCTEvaluateAssertion(.equal, message: message, file: file, line: line) {
let (value1, value2) = (try expression1(), try expression2())
if equal(value1, value2) {
return .success
} else {
return .expectedFailure("(\"\(value1)\") is not equal to (\"\(value2)\")")
}
}
}
public func XCTAssertEqual<A: Equatable, B: Equatable>(_ expression1: @autoclosure () throws -> (A, B), _ expression2: @autoclosure () throws -> (A, B), _ message: @autoclosure () -> String = "", file: StaticString = #filePath, line: UInt = #line) {
_XCTAssertEqual(expression1, expression2, { $0 == $1 }, message, file: file, line: line)
}
fileprivate func ==<A: Equatable, B: Equatable>(_ lhs: [(A, B)], _ rhs: [(A, B)]) -> Bool {
guard lhs.count == rhs.count else {
return false
}
for (lhsElement, rhsElement) in zip(lhs, rhs) {
if lhsElement != rhsElement {
return false
}
}
return true
}
public func XCTAssertEqual<A: Equatable, B: Equatable>(_ expression1: @autoclosure () throws -> [(A, B)], _ expression2: @autoclosure () throws -> [(A, B)], _ message: @autoclosure () -> String = "", file: StaticString = #filePath, line: UInt = #line) {
_XCTAssertEqual(expression1, expression2, { $0 == $1 }, message, file: file, line: line)
}
public func XCTAssertEqual<A: Equatable, B: Equatable, C: Equatable>(_ expression1: @autoclosure () throws -> (A, B, C), _ expression2: @autoclosure () throws -> (A, B, C), _ message: @autoclosure () -> String = "", file: StaticString = #filePath, line: UInt = #line) {
_XCTAssertEqual(expression1, expression2, { $0 == $1 }, message, file: file, line: line)
}
fileprivate func ==<A: Equatable, B: Equatable, C: Equatable>(_ lhs: [(A, B, C)], _ rhs: [(A, B, C)]) -> Bool {
guard lhs.count == rhs.count else {
return false
}
for (lhsElement, rhsElement) in zip(lhs, rhs) {
if lhsElement != rhsElement {
return false
}
}
return true
}
public func XCTAssertEqual<A: Equatable, B: Equatable, C: Equatable>(_ expression1: @autoclosure () throws -> [(A, B, C)], _ expression2: @autoclosure () throws -> [(A, B, C)], _ message: @autoclosure () -> String = "", file: StaticString = #filePath, line: UInt = #line) {
_XCTAssertEqual(expression1, expression2, { $0 == $1 }, message, file: file, line: line)
}
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
internal func XCTAssertThrowsError<T>(
_ expression: @autoclosure () async throws -> T,
file: StaticString = #file,
line: UInt = #line,
verify: (Error) -> Void = { _ in }
) async {
do {
_ = try await expression()
XCTFail("Expression did not throw error", file: file, line: line)
} catch {
verify(error)
}
}
class WaiterDelegate: NSObject, XCTWaiterDelegate {
let state: ManagedCriticalState<UnsafeContinuation<Void, Never>?> = ManagedCriticalState(nil)
init(_ continuation: UnsafeContinuation<Void, Never>) {
state.withCriticalRegion { $0 = continuation }
}
func waiter(_ waiter: XCTWaiter, didFulfillInvertedExpectation expectation: XCTestExpectation) {
resume()
}
func waiter(_ waiter: XCTWaiter, didTimeoutWithUnfulfilledExpectations unfulfilledExpectations: [XCTestExpectation]) {
resume()
}
func waiter(_ waiter: XCTWaiter, fulfillmentDidViolateOrderingConstraintsFor expectation: XCTestExpectation, requiredExpectation: XCTestExpectation) {
resume()
}
func nestedWaiter(_ waiter: XCTWaiter, wasInterruptedByTimedOutWaiter outerWaiter: XCTWaiter) {
}
func resume() {
let continuation = state.withCriticalRegion { continuation in
defer { continuation = nil }
return continuation
}
continuation?.resume()
}
}
extension XCTestCase {
@_disfavoredOverload
func fulfillment(of expectations: [XCTestExpectation], timeout: TimeInterval, enforceOrder: Bool = false, file: StaticString = #file, line: Int = #line) async {
return await withUnsafeContinuation { continuation in
let delegate = WaiterDelegate(continuation)
let waiter = XCTWaiter(delegate: delegate)
waiter.wait(for: expectations, timeout: timeout, enforceOrder: enforceOrder)
delegate.resume()
}
}
}
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