Alamofire/Tests/RequestTests.swift

//
//  RequestTests.swift
//
//  Copyright (c) 2014-2020 Alamofire Software Foundation (http://alamofire.org/)
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import Alamofire
import Foundation
import Testing
import XCTest

final class RequestResponseTestCase: BaseTestCase {
    @MainActor
    func testRequestResponse() {
        // Given
        let url = Endpoint.get.url
        let expectation = expectation(description: "GET request should succeed: \(url)")
        var response: DataResponse<Data?, AFError>?

        // When
        AF.request(url, parameters: ["foo": "bar"])
            .response { resp in
                response = resp
                expectation.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(response?.request)
        XCTAssertNotNil(response?.response)
        XCTAssertNotNil(response?.data)
        XCTAssertNil(response?.error)
    }

    @MainActor
    func testThatDataRequestReceivesInitialResponse() {
        // Given
        let url = Endpoint.get.url
        var initialResponse: HTTPURLResponse?
        let didReceiveResponse = expectation(description: "didReceiveResponse")
        let didComplete = expectation(description: "GET request should succeed: \(url)")
        var response: DataResponse<Data?, AFError>?

        // When
        AF.request(url, parameters: ["foo": "bar"])
            .onHTTPResponse { response in
                initialResponse = response
                didReceiveResponse.fulfill()
            }
            .response { resp in
                response = resp
                didComplete.fulfill()
            }

        wait(for: [didReceiveResponse, didComplete], timeout: timeout, enforceOrder: true)

        // Then
        XCTAssertEqual(initialResponse, response?.response)
        XCTAssertNotNil(response?.request)
        XCTAssertNotNil(response?.response)
        XCTAssertNotNil(response?.data)
        XCTAssertNil(response?.error)
    }

    @MainActor
    func testThatDataRequestOnHTTPResponseCanAllow() {
        // Given
        let url = Endpoint.get.url
        var initialResponse: HTTPURLResponse?
        let didReceiveResponse = expectation(description: "didReceiveResponse")
        let didComplete = expectation(description: "GET request should succeed: \(url)")
        var response: DataResponse<Data?, AFError>?

        // When
        AF.request(url, parameters: ["foo": "bar"])
            .onHTTPResponse { response, completionHandler in
                initialResponse = response
                didReceiveResponse.fulfill()
                completionHandler(.allow)
            }
            .response { resp in
                response = resp
                didComplete.fulfill()
            }

        wait(for: [didReceiveResponse, didComplete], timeout: timeout, enforceOrder: true)

        // Then
        XCTAssertEqual(initialResponse, response?.response)
        XCTAssertNotNil(response?.request)
        XCTAssertNotNil(response?.response)
        XCTAssertNotNil(response?.data)
        XCTAssertNil(response?.error)
    }

    @MainActor
    func testThatDataRequestOnHTTPResponseCanCancel() {
        // Given
        let url = Endpoint.get.url
        var initialResponse: HTTPURLResponse?
        let didReceiveResponse = expectation(description: "didReceiveResponse")
        let didComplete = expectation(description: "GET request should succeed: \(url)")
        var response: DataResponse<Data?, AFError>?

        // When
        let request = AF.request(url, parameters: ["foo": "bar"])
            .onHTTPResponse { response, completionHandler in
                initialResponse = response
                didReceiveResponse.fulfill()
                completionHandler(.cancel)
            }
            .response { resp in
                response = resp
                didComplete.fulfill()
            }

        wait(for: [didReceiveResponse, didComplete], timeout: timeout, enforceOrder: true)

        // Then
        XCTAssertEqual(initialResponse, response?.response)
        XCTAssertNotNil(response?.request)
        XCTAssertNotNil(response?.response)
        XCTAssertNil(response?.data)
        XCTAssertTrue(request.isCancelled, "onHTTPResponse cancelled request should have isCancelled == true")
        XCTAssertTrue(response?.error?.isExplicitlyCancelledError == true, "onHTTPResponse cancelled request should be explicitly cancelled")
    }

    @MainActor
    func testRequestResponseWithProgress() {
        // Given
        let byteCount = 512
        let url = Endpoint.bytes(byteCount).url

        let expectation = expectation(description: "Bytes download progress should be reported: \(url)")

        var progressValues: [Double] = []
        var response: DataResponse<Data?, AFError>?

        // When
        AF.request(url)
            .downloadProgress { progress in
                progressValues.append(progress.fractionCompleted)
            }
            .response { resp in
                response = resp
                expectation.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(response?.request)
        XCTAssertNotNil(response?.response)
        XCTAssertNotNil(response?.data)
        XCTAssertNil(response?.error)

        var previousProgress: Double = progressValues.first ?? 0.0

        for progress in progressValues {
            XCTAssertGreaterThanOrEqual(progress, previousProgress)
            previousProgress = progress
        }

        if let lastProgressValue = progressValues.last {
            XCTAssertEqual(lastProgressValue, 1.0)
        } else {
            XCTFail("last item in progressValues should not be nil")
        }
    }

    @MainActor
    func testPOSTRequestWithUnicodeParameters() {
        // Given
        let parameters = ["french": "français",
                          "japanese": "日本語",
                          "arabic": "العربية",
                          "emoji": "😃"]

        let expectation = expectation(description: "request should succeed")

        var response: DataResponse<TestResponse, AFError>?

        // When
        AF.request(.method(.post), parameters: parameters)
            .responseDecodable(of: TestResponse.self) { closureResponse in
                response = closureResponse
                expectation.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(response?.request)
        XCTAssertNotNil(response?.response)
        XCTAssertNotNil(response?.data)

        if let form = response?.result.success?.form {
            XCTAssertEqual(form["french"], parameters["french"])
            XCTAssertEqual(form["japanese"], parameters["japanese"])
            XCTAssertEqual(form["arabic"], parameters["arabic"])
            XCTAssertEqual(form["emoji"], parameters["emoji"])
        } else {
            XCTFail("form parameter in JSON should not be nil")
        }
    }

    @MainActor
    func testPOSTRequestWithBase64EncodedImages() {
        // Given
        let pngBase64EncodedString: String = {
            let fileURL = url(forResource: "unicorn", withExtension: "png")
            let data = try! Data(contentsOf: fileURL)

            return data.base64EncodedString(options: .lineLength64Characters)
        }()

        let jpegBase64EncodedString: String = {
            let fileURL = url(forResource: "rainbow", withExtension: "jpg")
            let data = try! Data(contentsOf: fileURL)

            return data.base64EncodedString(options: .lineLength64Characters)
        }()

        let parameters = ["email": "user@alamofire.org",
                          "png_image": pngBase64EncodedString,
                          "jpeg_image": jpegBase64EncodedString]

        let expectation = expectation(description: "request should succeed")

        var response: DataResponse<TestResponse, AFError>?

        // When
        AF.request(Endpoint.method(.post), method: .post, parameters: parameters)
            .responseDecodable(of: TestResponse.self) { closureResponse in
                response = closureResponse
                expectation.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(response?.request)
        XCTAssertNotNil(response?.response)
        XCTAssertNotNil(response?.data)
        XCTAssertEqual(response?.result.isSuccess, true)

        if let form = response?.result.success?.form {
            XCTAssertEqual(form["email"], parameters["email"])
            XCTAssertEqual(form["png_image"], parameters["png_image"])
            XCTAssertEqual(form["jpeg_image"], parameters["jpeg_image"])
        } else {
            XCTFail("form parameter in JSON should not be nil")
        }
    }

    // MARK: Queues

    @MainActor
    func testThatResponseSerializationWorksWithSerializationQueue() {
        // Given
        let queue = DispatchQueue(label: "org.alamofire.testSerializationQueue")
        let manager = Session(serializationQueue: queue)
        let expectation = expectation(description: "request should complete")
        var response: DataResponse<TestResponse, AFError>?

        // When
        manager.request(.get).responseDecodable(of: TestResponse.self) { resp in
            response = resp
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(response?.result.isSuccess, true)
    }

    @MainActor
    func testThatRequestsWorksWithRequestAndSerializationQueues() {
        // Given
        let requestQueue = DispatchQueue(label: "org.alamofire.testRequestQueue")
        let serializationQueue = DispatchQueue(label: "org.alamofire.testSerializationQueue")
        let manager = Session(requestQueue: requestQueue, serializationQueue: serializationQueue)
        let expectation = expectation(description: "request should complete")
        var response: DataResponse<TestResponse, AFError>?

        // When
        manager.request(.get).responseDecodable(of: TestResponse.self) { resp in
            response = resp
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(response?.result.isSuccess, true)
    }

    @MainActor
    func testThatRequestsWorksWithConcurrentRequestAndSerializationQueues() {
        // Given
        let requestQueue = DispatchQueue(label: "org.alamofire.testRequestQueue", attributes: .concurrent)
        let serializationQueue = DispatchQueue(label: "org.alamofire.testSerializationQueue", attributes: .concurrent)
        let session = Session(requestQueue: requestQueue, serializationQueue: serializationQueue)
        let count = 10
        let expectation = expectation(description: "request should complete")
        expectation.expectedFulfillmentCount = count
        var responses: [DataResponse<TestResponse, AFError>] = []

        // When
        DispatchQueue.concurrentPerform(iterations: count) { _ in
            session.request(.default).responseDecodable(of: TestResponse.self) { resp in
                responses.append(resp)
                expectation.fulfill()
            }
        }

        waitForExpectations(timeout: timeout, handler: nil)

        // Then
        XCTAssertEqual(responses.count, count)
        XCTAssertTrue(responses.allSatisfy(\.result.isSuccess))
    }

    // MARK: Encodable Parameters

    @MainActor
    func testThatRequestsCanPassEncodableParametersAsJSONBodyData() {
        // Given
        let parameters = TestParameters(property: "one")
        let expect = expectation(description: "request should complete")
        var receivedResponse: DataResponse<TestResponse, AFError>?

        // When
        AF.request(.method(.post), parameters: parameters, encoder: JSONParameterEncoder.default)
            .responseDecodable(of: TestResponse.self) { response in
                receivedResponse = response
                expect.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(receivedResponse?.result.success?.data, "{\"property\":\"one\"}")
    }

    @MainActor
    func testThatRequestsCanPassEncodableParametersAsAURLQuery() {
        // Given
        let parameters = TestParameters(property: "one")
        let expect = expectation(description: "request should complete")
        var receivedResponse: DataResponse<TestResponse, AFError>?

        // When
        AF.request(.method(.get), parameters: parameters)
            .responseDecodable(of: TestResponse.self) { response in
                receivedResponse = response
                expect.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(receivedResponse?.result.success?.args, ["property": "one"])
    }

    @MainActor
    func testThatRequestsCanPassEncodableParametersAsURLEncodedBodyData() {
        // Given
        let parameters = TestParameters(property: "one")
        let expect = expectation(description: "request should complete")
        var receivedResponse: DataResponse<TestResponse, AFError>?

        // When
        AF.request(.method(.post), parameters: parameters)
            .responseDecodable(of: TestResponse.self) { response in
                receivedResponse = response
                expect.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(receivedResponse?.result.success?.form, ["property": "one"])
    }

    // MARK: Lifetime Events

    @MainActor
    func testThatAutomaticallyResumedRequestReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 4

        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidFinish = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default).response { _ in expect.fulfill() }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatInstanceAutomaticallyResumedRequestReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(startRequestsImmediately: false, eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 4

        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidFinish = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default, shouldAutomaticallyResume: true).response { _ in expect.fulfill() }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatAutomaticallyAndManuallyResumedRequestReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 4

        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidFinish = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default).response { _ in expect.fulfill() }
        for _ in 0..<100 {
            request.resume()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatManuallyResumedRequestReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(startRequestsImmediately: false, eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 3

        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidFinish = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default)
        for _ in 0..<100 {
            request.resume()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatInstanceManuallyResumedRequestReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 3

        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidFinish = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default, shouldAutomaticallyResume: false)
        for _ in 0..<100 {
            request.resume()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatRequestManuallyResumedManyTimesOnlyReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(startRequestsImmediately: false, eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 4

        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidFinish = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default).response { _ in expect.fulfill() }
        for _ in 0..<100 {
            request.resume()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatRequestInstanceManuallyResumedManyTimesOnlyReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 4

        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidFinish = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default, shouldAutomaticallyResume: false).response { _ in expect.fulfill() }
        for _ in 0..<100 {
            request.resume()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatRequestManuallySuspendedManyTimesAfterAutomaticResumeOnlyReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(startRequestsImmediately: false, requestSetup: .eager, eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 2

        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default)
        for _ in 0..<100 {
            request.suspend()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .suspended)
    }

    @MainActor
    func testThatRequestManuallySuspendedManyTimesOnlyReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(startRequestsImmediately: false, requestSetup: .eager, eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 2

        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default)
        for _ in 0..<100 {
            request.suspend()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .suspended)
    }

    @MainActor
    func testThatRequestManuallyCancelledManyTimesAfterAutomaticResumeOnlyReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(requestSetup: .eager, eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 2

        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default)
        // Cancellation stops task creation, so don't cancel the request until the task has been created.
        eventMonitor.requestDidCreateTask = { [unowned request] _, _ in
            for _ in 0..<100 {
                request.cancel()
            }
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .cancelled)
    }

    @MainActor
    func testThatRequestManuallyCancelledManyTimesOnlyReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(startRequestsImmediately: false, requestSetup: .eager, eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 2

        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.default)
        // Cancellation stops task creation, so don't cancel the request until the task has been created.
        eventMonitor.requestDidCreateTask = { [unowned request] _, _ in
            for _ in 0..<100 {
                request.cancel()
            }
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .cancelled)
    }

    @MainActor
    func testThatRequestManuallyCancelledManyTimesOnManyQueuesOnlyReceivesAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(eventMonitors: [eventMonitor])

        let expect = expectation(description: "request should receive appropriate lifetime events")
        expect.expectedFulfillmentCount = 6

        eventMonitor.requestDidCancelTask = { _, _ in expect.fulfill() }
        eventMonitor.requestDidCancel = { _ in expect.fulfill() }
        eventMonitor.requestDidResume = { _ in expect.fulfill() }
        eventMonitor.requestDidResumeTask = { _, _ in expect.fulfill() }
        // Fulfill other events that would exceed the expected count. Inverted expectations require the full timeout.
        eventMonitor.requestDidSuspend = { _ in expect.fulfill() }
        eventMonitor.requestDidSuspendTask = { _, _ in expect.fulfill() }

        // When
        let request = session.request(.delay(5)).response { _ in expect.fulfill() }
        // Cancellation stops task creation, so don't cancel the request until the task has been created.
        eventMonitor.requestDidCreateTask = { [unowned request] _, _ in
            DispatchQueue.concurrentPerform(iterations: 100) { i in
                request.cancel()

                if i == 99 { expect.fulfill() }
            }
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .cancelled)
    }

    @MainActor
    func testThatRequestTriggersAllAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(eventMonitors: [eventMonitor])

        // Disable event test until Firewalk support HTTPS.
        //  let didReceiveChallenge = expectation(description: "didReceiveChallenge should fire")
        let taskDidFinishCollecting = expectation(description: "taskDidFinishCollecting should fire")
        let didReceiveData = expectation(description: "didReceiveData should fire")
        let willCacheResponse = expectation(description: "willCacheResponse should fire")
        let didCreateURLRequest = expectation(description: "didCreateInitialURLRequest should fire")
        let didCreateTask = expectation(description: "didCreateTask should fire")
        let didGatherMetrics = expectation(description: "didGatherMetrics should fire")
        let didComplete = expectation(description: "didComplete should fire")
        let didFinish = expectation(description: "didFinish should fire")
        let didResume = expectation(description: "didResume should fire")
        let didResumeTask = expectation(description: "didResumeTask should fire")
        let didParseResponse = expectation(description: "didParseResponse should fire")
        let responseHandler = expectation(description: "responseHandler should fire")

        var dataReceived = false

        // Disable event test until Firewalk supports HTTPS.
        //  eventMonitor.taskDidReceiveChallenge = { _, _, _ in didReceiveChallenge.fulfill() }
        eventMonitor.taskDidFinishCollectingMetrics = { _, _, _ in taskDidFinishCollecting.fulfill() }
        eventMonitor.dataTaskDidReceiveData = { _, _, _ in
            guard !dataReceived else { return }
            // Data may be received many times, fulfill only once.
            dataReceived = true
            didReceiveData.fulfill()
        }
        eventMonitor.dataTaskWillCacheResponse = { _, _, _ in willCacheResponse.fulfill() }
        eventMonitor.requestDidCreateInitialURLRequest = { _, _ in didCreateURLRequest.fulfill() }
        eventMonitor.requestDidCreateTask = { _, _ in didCreateTask.fulfill() }
        eventMonitor.requestDidGatherMetrics = { _, _ in didGatherMetrics.fulfill() }
        eventMonitor.requestDidCompleteTaskWithError = { _, _, _ in didComplete.fulfill() }
        eventMonitor.requestDidFinish = { _ in didFinish.fulfill() }
        eventMonitor.requestDidResume = { _ in didResume.fulfill() }
        eventMonitor.requestDidResumeTask = { _, _ in didResumeTask.fulfill() }
        eventMonitor.requestDidParseResponse = { _, _ in didParseResponse.fulfill() }

        // When
        let request = session.request(.default).response { _ in
            responseHandler.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .finished)
    }

    @MainActor
    func testThatCancelledRequestTriggersAllAppropriateLifetimeEvents() {
        // Given
        let eventMonitor = ClosureEventMonitor()
        let session = Session(startRequestsImmediately: false, eventMonitors: [eventMonitor])

        let taskDidFinishCollecting = expectation(description: "taskDidFinishCollecting should fire")
        let didCreateURLRequest = expectation(description: "didCreateInitialURLRequest should fire")
        let didCreateTask = expectation(description: "didCreateTask should fire")
        let didGatherMetrics = expectation(description: "didGatherMetrics should fire")
        let didComplete = expectation(description: "didComplete should fire")
        let didFinish = expectation(description: "didFinish should fire")
        let didResume = expectation(description: "didResume should fire")
        let didResumeTask = expectation(description: "didResumeTask should fire")
        let didParseResponse = expectation(description: "didParseResponse should fire")
        let didCancel = expectation(description: "didCancel should fire")
        let didCancelTask = expectation(description: "didCancelTask should fire")
        let responseHandler = expectation(description: "responseHandler should fire")

        eventMonitor.taskDidFinishCollectingMetrics = { _, _, _ in taskDidFinishCollecting.fulfill() }
        eventMonitor.requestDidCreateInitialURLRequest = { _, _ in didCreateURLRequest.fulfill() }
        eventMonitor.requestDidCreateTask = { _, _ in didCreateTask.fulfill() }
        eventMonitor.requestDidGatherMetrics = { _, _ in didGatherMetrics.fulfill() }
        eventMonitor.requestDidCompleteTaskWithError = { _, _, _ in didComplete.fulfill() }
        eventMonitor.requestDidFinish = { _ in didFinish.fulfill() }
        eventMonitor.requestDidResume = { _ in didResume.fulfill() }
        eventMonitor.requestDidParseResponse = { _, _ in didParseResponse.fulfill() }
        eventMonitor.requestDidCancel = { _ in didCancel.fulfill() }
        eventMonitor.requestDidCancelTask = { _, _ in didCancelTask.fulfill() }

        // When
        let request = session.request(.delay(5)).response { _ in
            responseHandler.fulfill()
        }

        eventMonitor.requestDidResumeTask = { [unowned request] _, _ in
            request.cancel()
            didResumeTask.fulfill()
        }

        request.resume()

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.state, .cancelled)
    }

    @MainActor
    func testThatAppendingResponseSerializerToCancelledRequestCallsCompletion() {
        // Given
        let session = Session()

        var response1: DataResponse<TestResponse, AFError>?
        var response2: DataResponse<TestResponse, AFError>?

        let expect = expectation(description: "both response serializer completions should be called")
        expect.expectedFulfillmentCount = 2

        // When
        let request = session.request(.default)

        request.responseDecodable(of: TestResponse.self) { resp in
            response1 = resp
            expect.fulfill()

            request.responseDecodable(of: TestResponse.self) { resp in
                response2 = resp
                expect.fulfill()
            }
        }

        request.cancel()

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(response1?.error?.isExplicitlyCancelledError, true)
        XCTAssertEqual(response2?.error?.isExplicitlyCancelledError, true)
    }

    @MainActor
    func testThatAppendingResponseSerializerToCompletedRequestInsideCompletionResumesRequest() {
        // Given
        let session = Session()

        var response1: DataResponse<TestResponse, AFError>?
        var response2: DataResponse<TestResponse, AFError>?
        var response3: DataResponse<TestResponse, AFError>?

        let expect = expectation(description: "all response serializer completions should be called")
        expect.expectedFulfillmentCount = 3

        // When
        let request = session.request(.default)

        request.responseDecodable(of: TestResponse.self) { resp in
            response1 = resp
            expect.fulfill()

            request.responseDecodable(of: TestResponse.self) { resp in
                response2 = resp
                expect.fulfill()

                request.responseDecodable(of: TestResponse.self) { resp in
                    response3 = resp
                    expect.fulfill()
                }
            }
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(response1?.value)
        XCTAssertNotNil(response2?.value)
        XCTAssertNotNil(response3?.value)
    }

    @MainActor
    func testThatAppendingResponseSerializerToCompletedRequestOutsideCompletionResumesRequest() {
        // Given
        let session = Session()
        let request = session.request(.default)

        var response1: DataResponse<TestResponse, AFError>?
        var response2: DataResponse<TestResponse, AFError>?
        var response3: DataResponse<TestResponse, AFError>?

        // When
        let expect1 = expectation(description: "response serializer 1 completion should be called")
        request.responseDecodable(of: TestResponse.self) { response1 = $0; expect1.fulfill() }
        waitForExpectations(timeout: timeout)

        let expect2 = expectation(description: "response serializer 2 completion should be called")
        request.responseDecodable(of: TestResponse.self) { response2 = $0; expect2.fulfill() }
        waitForExpectations(timeout: timeout)

        let expect3 = expectation(description: "response serializer 3 completion should be called")
        request.responseDecodable(of: TestResponse.self) { response3 = $0; expect3.fulfill() }
        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(response1?.value)
        XCTAssertNotNil(response2?.value)
        XCTAssertNotNil(response3?.value)
    }
}

// MARK: -

final class RequestDescriptionTestCase: BaseTestCase {
    @MainActor
    func testRequestDescription() {
        // Given
        let url = Endpoint().url
        let manager = Session(startRequestsImmediately: false)
        let request = manager.request(url)

        let expectation = expectation(description: "Request description should update: \(url)")

        var response: HTTPURLResponse?

        // When
        request.response { resp in
            response = resp.response

            expectation.fulfill()
        }.resume()

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(request.description, "GET \(url) (\(response?.statusCode ?? -1))")
    }
}

// MARK: -

final class RequestCURLDescriptionTestCase: BaseTestCase {
    // MARK: Properties

    let session: Session = .init(requestSetup: .eager)

    let sessionWithAcceptLanguageHeader: Session = {
        var headers = HTTPHeaders.default
        headers["Accept-Language"] = "en-US"

        let configuration = URLSessionConfiguration.af.default
        configuration.headers = headers

        return Session(configuration: configuration, requestSetup: .eager)
    }()

    let sessionWithContentTypeHeader: Session = {
        var headers = HTTPHeaders.default
        headers["Content-Type"] = "application/json"

        let configuration = URLSessionConfiguration.af.default
        configuration.headers = headers

        return Session(configuration: configuration, requestSetup: .eager)
    }()

    func sessionWithCookie(_ cookie: HTTPCookie) -> Session {
        let configuration = URLSessionConfiguration.af.default
        configuration.httpCookieStorage?.setCookie(cookie)

        return Session(configuration: configuration, requestSetup: .eager)
    }

    let sessionDisallowingCookies: Session = {
        let configuration = URLSessionConfiguration.af.default
        configuration.httpShouldSetCookies = false

        return Session(configuration: configuration, requestSetup: .eager)
    }()

    // MARK: Tests

    @MainActor
    func testGETRequestCURLDescription() {
        // Given
        let url = Endpoint().url
        let expectation = expectation(description: "request should complete")
        var components: [String]?

        // When
        session.request(url).cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            expectation.fulfill()
        }
        // requires eager perform

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertTrue(components?.contains("-X") == true)
        XCTAssertEqual(components?.last, "\"\(url)\"")
    }

    @MainActor
    func testGETRequestCURLDescriptionOnMainQueue() {
        // Given
        let url = Endpoint().url
        let expectation = expectation(description: "request should complete")
        var isMainThread = false
        var components: [String]?

        // When
        session.request(url).cURLDescription(on: .main) {
            components = self.cURLCommandComponents(from: $0)
            isMainThread = Thread.isMainThread
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout, handler: nil)

        // Then
        XCTAssertTrue(isMainThread)
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertTrue(components?.contains("-X") == true)
        XCTAssertEqual(components?.last, "\"\(url)\"")
    }

    @MainActor
    func testGETRequestCURLDescriptionSynchronous() {
        // Given
        let url = Endpoint().url
        let expectation = expectation(description: "request should complete")
        var components: [String]?
        var syncComponents: [String]?

        // When
        let request = session.request(url)
        request.cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            syncComponents = self.cURLCommandComponents(from: request.cURLDescription())
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertTrue(components?.contains("-X") == true)
        XCTAssertEqual(components?.last, "\"\(url)\"")
        XCTAssertEqual(components?.sorted(), syncComponents?.sorted())
    }

    @MainActor
    func testGETRequestCURLDescriptionCanBeRequestedManyTimes() {
        // Given
        let url = Endpoint().url
        let expectation = expectation(description: "request should complete")
        var components: [String]?
        var secondComponents: [String]?

        // When
        let request = session.request(url)
        request.cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            request.cURLDescription {
                secondComponents = self.cURLCommandComponents(from: $0)
                expectation.fulfill()
            }
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertTrue(components?.contains("-X") == true)
        XCTAssertEqual(components?.last, "\"\(url)\"")
        XCTAssertEqual(components?.sorted(), secondComponents?.sorted())
    }

    @MainActor
    func testGETRequestWithCustomHeaderCURLDescription() {
        // Given
        let url = Endpoint().url
        let expectation = expectation(description: "request should complete")
        var cURLDescription: String?

        // When
        let headers: HTTPHeaders = ["X-Custom-Header": "{\"key\": \"value\"}"]
        session.request(url, headers: headers).cURLDescription {
            cURLDescription = $0
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(cURLDescription?.range(of: "-H \"X-Custom-Header: {\\\"key\\\": \\\"value\\\"}\""))
    }

    @MainActor
    func testGETRequestWithDuplicateHeadersDebugDescription() {
        // Given
        let url = Endpoint().url
        let expectation = expectation(description: "request should complete")
        var cURLDescription: String?
        var components: [String]?

        // When
        let headers: HTTPHeaders = ["Accept-Language": "en-GB"]
        sessionWithAcceptLanguageHeader.request(url, headers: headers).cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            cURLDescription = $0
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertTrue(components?.contains("-X") == true)
        XCTAssertEqual(components?.last, "\"\(url)\"")

        let acceptLanguageCount = components?.count(where: { $0.contains("Accept-Language") })
        XCTAssertEqual(acceptLanguageCount, 1, "command should contain a single Accept-Language header")

        XCTAssertNotNil(cURLDescription?.range(of: "-H \"Accept-Language: en-GB\""))
    }

    @MainActor
    func testPOSTRequestCURLDescription() {
        // Given
        let url = Endpoint.method(.post).url
        let expectation = expectation(description: "request should complete")
        var components: [String]?

        // When
        session.request(url, method: .post).cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertEqual(components?[3..<5], ["-X", "POST"])
        XCTAssertEqual(components?.last, "\"\(url)\"")
    }

    @MainActor
    func testPOSTRequestWithJSONParametersCURLDescription() {
        // Given
        let url = Endpoint.method(.post).url
        let expectation = expectation(description: "request should complete")
        var cURLDescription: String?
        var components: [String]?

        let parameters = ["foo": "bar",
                          "fo\"o": "b\"ar",
                          "f'oo": "ba'r"]

        // When
        session.request(url, method: .post, parameters: parameters, encoding: JSONEncoding.default).cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            cURLDescription = $0
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertEqual(components?[3..<5], ["-X", "POST"])

        XCTAssertNotNil(cURLDescription?.range(of: "-H \"Content-Type: application/json\""))
        XCTAssertNotNil(cURLDescription?.range(of: "-d \"{"))
        XCTAssertNotNil(cURLDescription?.range(of: "\\\"f'oo\\\":\\\"ba'r\\\""))
        XCTAssertNotNil(cURLDescription?.range(of: "\\\"fo\\\\\\\"o\\\":\\\"b\\\\\\\"ar\\\""))
        XCTAssertNotNil(cURLDescription?.range(of: "\\\"foo\\\":\\\"bar\\"))

        XCTAssertEqual(components?.last, "\"\(url)\"")
    }

    @MainActor
    func testPOSTRequestWithCookieCURLDescription() {
        // Given
        let url = Endpoint.method(.post).url

        let cookie = HTTPCookie(properties: [.domain: url.host as Any,
                                             .path: url.path,
                                             .name: "foo",
                                             .value: "bar"])!
        let cookieManager = sessionWithCookie(cookie)
        let expectation = expectation(description: "request should complete")
        var components: [String]?

        // When
        cookieManager.request(url, method: .post).cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertEqual(components?[3..<5], ["-X", "POST"])
        XCTAssertEqual(components?.last, "\"\(url)\"")
        XCTAssertEqual(components?[5..<6], ["-b"])
    }

    @MainActor
    func testPOSTRequestWithCookiesDisabledCURLDescriptionHasNoCookies() {
        // Given
        let url = Endpoint.method(.post).url

        let cookie = HTTPCookie(properties: [.domain: url.host as Any,
                                             .path: url.path,
                                             .name: "foo",
                                             .value: "bar"])!
        sessionDisallowingCookies.session.configuration.httpCookieStorage?.setCookie(cookie)
        let expectation = expectation(description: "request should complete")
        var components: [String]?

        // When
        sessionDisallowingCookies.request(url, method: .post).cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        let cookieComponents = components?.filter { $0 == "-b" }
        XCTAssertTrue(cookieComponents?.isEmpty == true)
    }

    @MainActor
    func testMultipartFormDataRequestWithDuplicateHeadersCURLDescriptionHasOneContentTypeHeader() {
        // Given
        let url = Endpoint.method(.post).url
        let japaneseData = Data("日本語".utf8)
        let expectation = expectation(description: "multipart form data encoding should succeed")
        var cURLDescription: String?
        var components: [String]?

        // When
        sessionWithContentTypeHeader.upload(multipartFormData: { data in
            data.append(japaneseData, withName: "japanese")
        }, to: url).cURLDescription {
            components = self.cURLCommandComponents(from: $0)
            cURLDescription = $0
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(components?[0..<3], ["$", "curl", "-v"])
        XCTAssertTrue(components?.contains("-X") == true)
        XCTAssertEqual(components?.last, "\"\(url)\"")

        let contentTypeCount = components?.count(where: { $0.contains("Content-Type") })
        XCTAssertEqual(contentTypeCount, 1, "command should contain a single Content-Type header")

        XCTAssertNotNil(cURLDescription?.range(of: "-H \"Content-Type: multipart/form-data;"))
    }

    @MainActor
    func testThatRequestWithInvalidURLDebugDescription() {
        // Given
        let urlString = "invalid_url"
        let expectation = expectation(description: "request should complete")
        var cURLDescription: String?

        // When
        session.request(urlString).cURLDescription {
            cURLDescription = $0
            expectation.fulfill()
        }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNotNil(cURLDescription, "debugDescription should not crash")
    }

    // MARK: Test Helper Methods

    private func cURLCommandComponents(from cURLString: String) -> [String] {
        cURLString.components(separatedBy: .whitespacesAndNewlines)
            .filter { $0 != "" && $0 != "\\" }
    }
}

final class RequestLifetimeTests: BaseTestCase {
    @MainActor
    func testThatRequestProvidesURLRequestWhenCreated() {
        // Given
        let didReceiveRequest = expectation(description: "did receive task")
        let didComplete = expectation(description: "request did complete")
        var request: URLRequest?

        // When
        AF.request(.default)
            .onURLRequestCreation { request = $0; didReceiveRequest.fulfill() }
            .responseDecodable(of: TestResponse.self) { _ in didComplete.fulfill() }

        wait(for: [didReceiveRequest, didComplete], timeout: timeout, enforceOrder: true)

        // Then
        XCTAssertNotNil(request)
    }

    @MainActor
    func testThatRequestProvidesTaskWhenCreated() {
        // Given
        let didReceiveTask = expectation(description: "did receive task")
        let didComplete = expectation(description: "request did complete")
        var task: URLSessionTask?

        // When
        AF.request(.default)
            .onURLSessionTaskCreation { task = $0; didReceiveTask.fulfill() }
            .responseDecodable(of: TestResponse.self) { _ in didComplete.fulfill() }

        wait(for: [didReceiveTask, didComplete], timeout: timeout, enforceOrder: true)

        // Then
        XCTAssertNotNil(task)
    }
}

// MARK: -

final class RequestInvalidURLTestCase: BaseTestCase {
    @MainActor
    func testThatDataRequestWithFileURLThrowsError() {
        // Given
        let fileURL = url(forResource: "valid_data", withExtension: "json")
        let expectation = expectation(description: "Request should succeed.")
        var response: DataResponse<Data?, AFError>?

        // When
        AF.request(fileURL)
            .response { resp in
                response = resp
                expectation.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(response?.result.isSuccess, true)
    }

    @MainActor
    func testThatDownloadRequestWithFileURLThrowsError() {
        // Given
        let fileURL = url(forResource: "valid_data", withExtension: "json")
        let expectation = expectation(description: "Request should succeed.")
        var response: DownloadResponse<URL?, AFError>?

        // When
        AF.download(fileURL)
            .response { resp in
                response = resp
                expectation.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertEqual(response?.result.isSuccess, true)
    }

    @MainActor
    func testThatDataStreamRequestWithFileURLThrowsError() {
        // Given
        let fileURL = url(forResource: "valid_data", withExtension: "json")
        let expectation = expectation(description: "Request should succeed.")
        var response: DataStreamRequest.Completion?

        // When
        AF.streamRequest(fileURL)
            .responseStream { stream in
                guard case let .complete(completion) = stream.event else { return }

                response = completion
                expectation.fulfill()
            }

        waitForExpectations(timeout: timeout)

        // Then
        XCTAssertNil(response?.response)
    }
}

@Suite
struct RequestInstanceInterceptorTests {
    @Test
    func instanceAdapterIsCalled() async throws {
        // Given
        let session = Session()
        let adapter = InspectorInterceptor(.adapter { @Sendable request, _, completion in completion(.success(request)) })

        // When
        let response = await session
            .request(.get)
            .adapt(using: adapter)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        #expect(adapter.adaptations.count == 1)
    }

    @Test
    func instanceAdaptersAreCalledInAddedOrder() async throws {
        // Given
        let session = Session()
        let firstAdapter = InspectorInterceptor(.adapter { @Sendable request, _, completion in completion(.success(request)) })
        let secondAdapter = InspectorInterceptor(.adapter { @Sendable request, _, completion in completion(.success(request)) })

        // When
        let response = await session
            .request(.get)
            .adapt(using: firstAdapter)
            .adapt(using: secondAdapter)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        #expect(firstAdapter.adaptations.count == 1)
        #expect(secondAdapter.adaptations.count == 1)
        #expect(firstAdapter.adaptations[0].date < secondAdapter.adaptations[0].date)
    }

    @Test
    func sessionAdapterIsCalledBeforeInstanceAdapter() async throws {
        // Given
        let sessionInterceptor = InspectorInterceptor(.adapter { @Sendable request, _, completion in
            var request = request
            request.headers["session"] = "\(Date.now.timeIntervalSince1970)"
            completion(.success(request))
        })
        let session = Session(interceptor: sessionInterceptor)
        let instanceInterceptor = InspectorInterceptor(.adapter { @Sendable request, _, completion in
            var request = request
            request.headers["instance"] = "\(Date.now.timeIntervalSince1970)"
            completion(.success(request))
        })

        // When
        let response = await session
            .request(.get)
            .adapt(using: instanceInterceptor)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        if let sessionTime = response.request?.headers["session"].flatMap(Double.init),
           let instanceTime = response.request?.headers["instance"].flatMap(Double.init) {
            #expect(sessionTime < instanceTime)
        }
        #expect(sessionInterceptor.adaptations.count == 1)
        #expect(instanceInterceptor.adaptations.count == 1)
        #expect(sessionInterceptor.adaptations[0].date < instanceInterceptor.adaptations[0].date)
    }

    @Test
    func instanceInterceptorIsCalled() async throws {
        // Given
        let session = Session()
        let interceptor = InspectorInterceptor(
            .interceptor { @Sendable request, _, completion in
                completion(.success(request))
            } retrier: { @Sendable _, _, _, completion in
                completion(.retry)
            }
        )

        // When
        let response = await session
            .request(.endpoints(.delay(1).modifying(\.timeout, to: 0.0001), .get))
            .interceptor(interceptor)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        #expect(interceptor.adaptations.count == 2)
        #expect(interceptor.retries.count == 1)
    }

    @Test
    func multipleInstanceInterceptorsAreCalledInAddedOrder() async throws {
        // Given
        let session = Session()
        let firstInterceptor = InspectorInterceptor(
            .interceptor { @Sendable request, _, completion in
                completion(.success(request))
            } retrier: { @Sendable _, _, _, completion in
                completion(.doNotRetry)
            }
        )
        let secondInterceptor = InspectorInterceptor(
            .interceptor { @Sendable request, _, completion in
                completion(.success(request))
            } retrier: { @Sendable _, _, _, completion in
                completion(.retry)
            }
        )

        // When
        let response = await session
            .request(.endpoints(.delay(1).modifying(\.timeout, to: 0.0001), .get))
            .interceptor(firstInterceptor)
            .interceptor(secondInterceptor)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        #expect(firstInterceptor.adaptations.count == 2)
        #expect(firstInterceptor.retries.count == 1)
        #expect(secondInterceptor.adaptations.count == 2)
        #expect(secondInterceptor.retries.count == 1)
        #expect(firstInterceptor.adaptations[0].date < secondInterceptor.adaptations[0].date)
        #expect(firstInterceptor.adaptations[1].date < secondInterceptor.adaptations[1].date)
        #expect(firstInterceptor.retries[0].date < secondInterceptor.retries[0].date)
    }

    @Test
    func instanceRetrierIsCalled() async throws {
        // Given
        let session = Session()
        let interceptor = InspectorInterceptor(.retrier { @Sendable _, _, _, completion in completion(.retry) })

        // When
        let response = await session
            .request(.endpoints(.delay(1).modifying(\.timeout, to: 0.0001), .get))
            .retry(using: interceptor)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        #expect(interceptor.retries.count == 1)
    }

    @Test
    func multipleInstanceRetriersAreCalledInAddedOrder() async throws {
        // Given
        let session = Session()
        let firstRetrier = InspectorInterceptor(.retrier { @Sendable _, _, _, completion in completion(.doNotRetry) })
        let secondRetrier = InspectorInterceptor(.retrier { @Sendable _, _, _, completion in completion(.retry) })

        // When
        let response = await session
            .request(.endpoints(.delay(1).modifying(\.timeout, to: 0.0001), .get))
            .retry(using: firstRetrier)
            .retry(using: secondRetrier)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        #expect(firstRetrier.retries.count == 1)
        #expect(secondRetrier.retries.count == 1)
        #expect(firstRetrier.retries[0].date < secondRetrier.retries[0].date)
    }

    @Test
    func sessionRetrierIsCalledBeforeInstanceRetrier() async throws {
        // Given
        let sessionRetrier = InspectorInterceptor(.retrier { @Sendable _, _, _, completion in completion(.doNotRetry) })
        let session = Session(interceptor: sessionRetrier)
        let instanceRetrier = InspectorInterceptor(.retrier { @Sendable _, _, _, completion in completion(.retry) })

        // When
        let response = await session
            .request(.endpoints(.delay(1).modifying(\.timeout, to: 0.0001), .get))
            .retry(using: instanceRetrier)
            .serializingDecodable(TestResponse.self).response

        #expect(response.result.isSuccess)
        #expect(instanceRetrier.retries.count == 1)
        #expect(sessionRetrier.retries.count == 1)
        #expect(sessionRetrier.retries[0].date < instanceRetrier.retries[0].date)
    }

    @Test
    func instanceEventMonitorIsCalled() async throws {
        // Given
        let queue = DispatchQueue(label: "org.alamofire.\(#function)")
        let monitor = InspectorEventMonitor(queue: queue)
        let session = Session(rootQueue: queue, eventMonitors: [])

        // When
        let response = await session
            .request(.get)
            .eventMonitor(monitor)
            .serializingDecodable(TestResponse.self)
            .response
        await monitor.pendingEvents()

        // Then

        #expect(response.result.isSuccess)
        let expected = ["requestDidResume(_:)",
                        "request(_:didCreateInitialURLRequest:)",
                        "request(_:didCreateURLRequest:)",
                        "request(_:didCreateTask:)",
                        "request(_:didResumeTask:)",
                        "request(_:didGatherMetrics:)",
                        "requestDidFinish(_:)",
                        "request(_:didParseResponse:)"]
        #expect(monitor.events == expected, "Events didn't match, actual events: \(monitor.events)")
    }

    @Test
    func multipleInstanceEventMonitorsAreCalledInAddedOrder() async throws {
        // Given
        let queue = DispatchQueue(label: "org.alamofire.\(#function)")
        let firstMonitor = InspectorEventMonitor(queue: queue)
        let secondMonitor = InspectorEventMonitor(queue: queue)
        let session = Session(rootQueue: queue, eventMonitors: [])

        // When
        let response = await session
            .request(.get)
            .eventMonitor(firstMonitor)
            .eventMonitor(secondMonitor)
            .serializingDecodable(TestResponse.self)
            .response
        await firstMonitor.pendingEvents()

        // Then

        #expect(response.result.isSuccess)
        let expected = ["requestDidResume(_:)",
                        "request(_:didCreateInitialURLRequest:)",
                        "request(_:didCreateURLRequest:)",
                        "request(_:didCreateTask:)",
                        "request(_:didResumeTask:)",
                        "request(_:didGatherMetrics:)",
                        "requestDidFinish(_:)",
                        "request(_:didParseResponse:)"]
        #expect(firstMonitor.events == expected, "firstMonitor events didn't match, actual events: \(firstMonitor.events)")
        #expect(secondMonitor.events == expected, "secondMonitor events didn't match, actual events: \(firstMonitor.events)")
        for timelines in zip(firstMonitor.timeline, secondMonitor.timeline) {
            #expect(timelines.0.date <= timelines.1.date)
        }
    }

    @Test
    func instanceAndSessionEventMonitorsAreCalledInCorrectOrder() async throws {
        // Given
        let queue = DispatchQueue(label: "org.alamofire.\(#function)")
        let sessionMonitor = InspectorEventMonitor(label: "session", queue: queue)
        let instanceMonitor = InspectorEventMonitor(label: "instance", queue: queue)
        let session = Session(rootQueue: queue, eventMonitors: [sessionMonitor])

        // When
        let response = await session
            .request(.get)
            .eventMonitor(instanceMonitor)
            .serializingDecodable(TestResponse.self)
            .response
        await sessionMonitor.pendingEvents()
        await instanceMonitor.pendingEvents()

        // Then

        #expect(response.result.isSuccess)
        let expectedInstanceEvents = ["requestDidResume(_:)",
                                      "request(_:didCreateInitialURLRequest:)",
                                      "request(_:didCreateURLRequest:)",
                                      "request(_:didCreateTask:)",
                                      "request(_:didResumeTask:)",
                                      "request(_:didGatherMetrics:)",
                                      "requestDidFinish(_:)",
                                      "request(_:didParseResponse:)"]
        let expectedSessionEvents = ["requestDidResume(_:)",
                                     "request(_:didCreateInitialURLRequest:)",
                                     "request(_:didCreateURLRequest:)",
                                     "request(_:didCreateTask:)",
                                     "request(_:didResumeTask:)",
                                     "urlSession(_:dataTask:didReceive:)",
                                     "urlSession(_:dataTask:willCacheResponse:)",
                                     "urlSession(_:task:didFinishCollecting:)",
                                     "request(_:didGatherMetrics:)",
                                     "urlSession(_:task:didCompleteWithError:)",
                                     "requestDidFinish(_:)",
                                     "request(_:didParseResponse:)"]
        #expect(sessionMonitor.events == expectedSessionEvents, "Session events didn't match, actual events: \(sessionMonitor.events)")
        #expect(instanceMonitor.events == expectedInstanceEvents, "Instance events didn't match, actual events: \(instanceMonitor.events)")
        let instanceEvents = instanceMonitor.timeline
        var sessionEvents = sessionMonitor.timeline
        sessionEvents = sessionEvents.filter { session in instanceEvents.contains { $0.event == session.event } }
        #expect(instanceEvents.count == sessionEvents.count)
        for combinedEvent in zip(sessionEvents, instanceEvents) {
            #expect(combinedEvent.0.event == combinedEvent.1.event)
            #expect(combinedEvent.0.date <= combinedEvent.1.date, "session event wasn't before instance event")
        }
    }
}

#if canImport(zlib) && !os(Android) // Same condition as `DeflateRequestCompressor`.
@Suite
struct RequestCompressionTests {
    @Test
    @available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
    func thatRequestsCanBeCompressed() async {
        // Given
        let url = Endpoint.method(.post).url
        let parameters = TestParameters(property: "compressed")

        // When
        let result = await AF.request(url,
                                      method: .post,
                                      parameters: parameters,
                                      encoder: .json,
                                      interceptor: .deflateCompressor)
            .serializingDecodable(TestResponse.self)
            .result

        // Then
        #expect(result.isSuccess)
    }

    @Test
    @available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
    func thatDeflateCompressorThrowsErrorByDefaultWhenRequestAlreadyHasHeader() async {
        // Given
        let url = Endpoint.method(.post).url
        let parameters = TestParameters(property: "compressed")

        // When
        let result = await AF.request(url,
                                      method: .post,
                                      parameters: parameters,
                                      encoder: .json,
                                      headers: [.contentEncoding("value")],
                                      interceptor: .deflateCompressor)
            .serializingDecodable(TestResponse.self)
            .result

        // Then
        #expect(result.isFailure)
        #expect(result.failure?.underlyingError as? DeflateRequestCompressor.DuplicateHeaderError != nil)
    }

    @Test
    @available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
    func thatDeflateCompressorThrowsErrorWhenConfigured() async {
        // Given
        let url = Endpoint.method(.post).url
        let parameters = TestParameters(property: "compressed")

        // When
        let result = await AF.request(url,
                                      method: .post,
                                      parameters: parameters,
                                      encoder: .json,
                                      headers: [.contentEncoding("value")],
                                      interceptor: .deflateCompressor(duplicateHeaderBehavior: .error))
            .serializingDecodable(TestResponse.self)
            .result

        // Then
        #expect(result.isFailure)
        #expect(result.failure?.underlyingError as? DeflateRequestCompressor.DuplicateHeaderError != nil)
    }

    @Test
    @available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
    func thatDeflateCompressorReplacesHeaderWhenConfigured() async {
        // Given
        let url = Endpoint.method(.post).url
        let parameters = TestParameters(property: "compressed")

        // When
        let result = await AF.request(url,
                                      method: .post,
                                      parameters: parameters,
                                      encoder: .json,
                                      headers: [.contentEncoding("value")],
                                      interceptor: .deflateCompressor(duplicateHeaderBehavior: .replace))
            .serializingDecodable(TestResponse.self)
            .result

        // Then
        #expect(result.isSuccess)
    }

    @Test
    @available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
    func thatDeflateCompressorSkipsCompressionWhenConfigured() async {
        // Given
        let url = Endpoint.method(.post).url
        let parameters = TestParameters(property: "compressed")

        // When
        let result = await AF.request(url,
                                      method: .post,
                                      parameters: parameters,
                                      encoder: .json,
                                      headers: [.contentEncoding("gzip")],
                                      interceptor: .deflateCompressor(duplicateHeaderBehavior: .skip))
            .serializingDecodable(TestResponse.self)
            .result

        // Then
        // Request fails as the server expects gzip compression.
        #expect(result.isFailure)
    }

    @Test
    @available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
    func thatDeflateCompressorDoesNotCompressDataWhenClosureReturnsFalse() async {
        // Given
        let url = Endpoint.method(.post).url
        let parameters = TestParameters(property: "compressed")

        // When
        let result = await AF.request(url,
                                      method: .post,
                                      parameters: parameters,
                                      encoder: .json,
                                      interceptor: .deflateCompressor { _ in false })
            .serializingDecodable(TestResponse.self)
            .result

        // Then
        #expect(result.isSuccess)
        // With no compression, request headers reflected from server should have no Content-Encoding.
        #expect(result.success?.headers["Content-Encoding"] == nil)
    }
}
#endif