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SessionTests.swift
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SessionTests.swift
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//
// SessionTests.swift
//
// Copyright (c) 2014-2018 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.
//
@testable import Alamofire
import Foundation
import XCTest
final class SessionTestCase: BaseTestCase {
// MARK: Helper Types
private class HTTPMethodAdapter: RequestInterceptor {
let method: HTTPMethod
let throwsError: Bool
var adaptedCount = 0
init(method: HTTPMethod, throwsError: Bool = false) {
self.method = method
self.throwsError = throwsError
}
func adapt(_ urlRequest: URLRequest, using state: RequestAdapterState, completion: @escaping (Result<URLRequest, Error>) -> Void) {
adaptedCount += 1
let result: Result<URLRequest, Error> = Result {
guard !throwsError else { throw AFError.invalidURL(url: "") }
var urlRequest = urlRequest
urlRequest.httpMethod = method.rawValue
return urlRequest
}
completion(result)
}
}
private class HeaderAdapter: RequestInterceptor {
let headers: HTTPHeaders
let throwsError: Bool
var adaptedCount = 0
init(headers: HTTPHeaders = ["field": "value"], throwsError: Bool = false) {
self.headers = headers
self.throwsError = throwsError
}
func adapt(_ urlRequest: URLRequest, using state: RequestAdapterState, completion: @escaping (Result<URLRequest, Error>) -> Void) {
adaptedCount += 1
let result: Result<URLRequest, Error> = Result {
guard !throwsError else { throw AFError.invalidURL(url: "") }
var urlRequest = urlRequest
var finalHeaders = urlRequest.headers
headers.forEach { finalHeaders.add($0) }
urlRequest.headers = finalHeaders
return urlRequest
}
completion(result)
}
}
private class RequestHandler: RequestInterceptor {
var adaptCalledCount = 0
var adaptedCount = 0
var retryCount = 0
var retryCalledCount = 0
var retryErrors: [Error] = []
var shouldApplyAuthorizationHeader = false
var throwsErrorOnFirstAdapt = false
var throwsErrorOnSecondAdapt = false
var throwsErrorOnRetry = false
var shouldRetry = true
var retryDelay: TimeInterval?
func adapt(_ urlRequest: URLRequest,
using state: RequestAdapterState,
completion: @escaping (Result<URLRequest, Error>) -> Void) {
adaptCalledCount += 1
let result: Result<URLRequest, Error> = Result {
if throwsErrorOnFirstAdapt {
throwsErrorOnFirstAdapt = false
throw AFError.invalidURL(url: "/adapt/error/1")
}
if throwsErrorOnSecondAdapt && adaptedCount == 1 {
throwsErrorOnSecondAdapt = false
throw AFError.invalidURL(url: "/adapt/error/2")
}
var urlRequest = urlRequest
adaptedCount += 1
if shouldApplyAuthorizationHeader && adaptedCount > 1 {
urlRequest.headers.update(.authorization(username: "user", password: "password"))
}
return urlRequest
}
completion(result)
}
func retry(_ request: Request,
for session: Session,
dueTo error: Error,
completion: @escaping (RetryResult) -> Void) {
retryCalledCount += 1
if throwsErrorOnRetry {
let error = AFError.invalidURL(url: "/invalid/url/\(retryCalledCount)")
completion(.doNotRetryWithError(error))
return
}
guard shouldRetry else { completion(.doNotRetry); return }
retryCount += 1
retryErrors.append(error)
if retryCount < 2 {
if let retryDelay = retryDelay {
completion(.retryWithDelay(retryDelay))
} else {
completion(.retry)
}
} else {
completion(.doNotRetry)
}
}
}
private class UploadHandler: RequestInterceptor {
var adaptCalledCount = 0
var adaptedCount = 0
var retryCalledCount = 0
var retryCount = 0
var retryErrors: [Error] = []
func adapt(_ urlRequest: URLRequest,
using state: RequestAdapterState,
completion: @escaping (Result<URLRequest, Error>) -> Void) {
adaptCalledCount += 1
let result: Result<URLRequest, Error> = Result {
adaptedCount += 1
if adaptedCount == 1 { throw AFError.invalidURL(url: "") }
return urlRequest
}
completion(result)
}
func retry(_ request: Request,
for session: Session,
dueTo error: Error,
completion: @escaping (RetryResult) -> Void) {
retryCalledCount += 1
retryCount += 1
retryErrors.append(error)
completion(.retry)
}
}
// MARK: Tests - Initialization
func testInitializerWithDefaultArguments() {
// Given, When
let session = Session()
// Then
XCTAssertNotNil(session.session.delegate, "session delegate should not be nil")
XCTAssertTrue(session.delegate === session.session.delegate, "manager delegate should equal session delegate")
XCTAssertNil(session.serverTrustManager, "session server trust policy manager should be nil")
}
func testInitializerWithSpecifiedArguments() {
// Given
let configuration = URLSessionConfiguration.default
let delegate = SessionDelegate()
let serverTrustManager = ServerTrustManager(evaluators: [:])
// When
let session = Session(configuration: configuration,
delegate: delegate,
serverTrustManager: serverTrustManager)
// Then
XCTAssertNotNil(session.session.delegate, "session delegate should not be nil")
XCTAssertTrue(session.delegate === session.session.delegate, "manager delegate should equal session delegate")
XCTAssertNotNil(session.serverTrustManager, "session server trust policy manager should not be nil")
}
func testThatSessionInitializerSucceedsWithDefaultArguments() {
// Given
let delegate = SessionDelegate()
let underlyingQueue = DispatchQueue(label: "underlyingQueue")
let urlSession: URLSession = {
let configuration = URLSessionConfiguration.default
let queue = OperationQueue(underlyingQueue: underlyingQueue, name: "delegateQueue")
return URLSession(configuration: configuration, delegate: delegate, delegateQueue: queue)
}()
// When
let session = Session(session: urlSession, delegate: delegate, rootQueue: underlyingQueue)
// Then
XCTAssertTrue(session.delegate === session.session.delegate, "manager delegate should equal session delegate")
XCTAssertNil(session.serverTrustManager, "session server trust policy manager should be nil")
}
func testThatSessionInitializerSucceedsWithSpecifiedArguments() {
// Given
let delegate = SessionDelegate()
let underlyingQueue = DispatchQueue(label: "underlyingQueue")
let urlSession: URLSession = {
let configuration = URLSessionConfiguration.default
let queue = OperationQueue(underlyingQueue: underlyingQueue, name: "delegateQueue")
return URLSession(configuration: configuration, delegate: delegate, delegateQueue: queue)
}()
let serverTrustManager = ServerTrustManager(evaluators: [:])
// When
let session = Session(session: urlSession,
delegate: delegate,
rootQueue: underlyingQueue,
serverTrustManager: serverTrustManager)
// Then
XCTAssertTrue(session.delegate === session.session.delegate, "manager delegate should equal session delegate")
XCTAssertNotNil(session.serverTrustManager, "session server trust policy manager should not be nil")
}
// MARK: Tests - Parallel Root Queue
func testThatSessionWorksCorrectlyWhenPassedAConcurrentRootQueue() {
// Given
let queue = DispatchQueue(label: "ohNoAParallelQueue", attributes: .concurrent)
let session = Session(rootQueue: queue)
let didFinish = expectation(description: "request did finish")
var receivedResponse: TestResponse?
// When
session.request(.get).responseDecodable(of: TestResponse.self) { response in
receivedResponse = response.value
didFinish.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertNotNil(receivedResponse, "Should receive TestResponse.")
}
// MARK: Tests - Default HTTP Headers
func testDefaultUserAgentHeader() {
// Given, When
let userAgent = HTTPHeaders.default["User-Agent"]
// Then
let osNameVersion: String = {
let version = ProcessInfo.processInfo.operatingSystemVersion
let versionString = "\(version.majorVersion).\(version.minorVersion).\(version.patchVersion)"
let osName: String = {
#if os(iOS)
#if targetEnvironment(macCatalyst)
return "macOS(Catalyst)"
#else
return "iOS"
#endif
#elseif os(watchOS)
return "watchOS"
#elseif os(tvOS)
return "tvOS"
#elseif os(macOS)
return "macOS"
#elseif os(Linux)
return "Linux"
#else
return "Unknown"
#endif
}()
return "\(osName) \(versionString)"
}()
let alamofireVersion = "Alamofire/\(Alamofire.version)"
XCTAssertTrue(userAgent?.contains(alamofireVersion) == true)
XCTAssertTrue(userAgent?.contains(osNameVersion) == true)
XCTAssertTrue(userAgent?.contains("xctest/") == true)
}
// MARK: Tests - Supported Accept-Encodings
// Disabled due to HTTPBin flakiness.
func _testDefaultAcceptEncodingSupportsAppropriateEncodingsOnAppropriateSystems() {
// Given
let brotliExpectation = expectation(description: "brotli request should complete")
let gzipExpectation = expectation(description: "gzip request should complete")
let deflateExpectation = expectation(description: "deflate request should complete")
var brotliResponse: DataResponse<TestResponse, AFError>?
var gzipResponse: DataResponse<TestResponse, AFError>?
var deflateResponse: DataResponse<TestResponse, AFError>?
// When
AF.request(.compression(.brotli)).responseDecodable(of: TestResponse.self) { response in
brotliResponse = response
brotliExpectation.fulfill()
}
AF.request(.compression(.gzip)).responseDecodable(of: TestResponse.self) { response in
gzipResponse = response
gzipExpectation.fulfill()
}
AF.request(.compression(.deflate)).responseDecodable(of: TestResponse.self) { response in
deflateResponse = response
deflateExpectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
if #available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, *) {
XCTAssertTrue(brotliResponse?.result.isSuccess == true)
} else {
XCTAssertTrue(brotliResponse?.result.isFailure == true)
}
XCTAssertTrue(gzipResponse?.result.isSuccess == true)
XCTAssertTrue(deflateResponse?.result.isSuccess == true)
}
// MARK: Tests - Start Requests Immediately
func testSetStartRequestsImmediatelyToFalseAndResumeRequest() {
// Given
let session = Session(startRequestsImmediately: false)
let url = Endpoint().url
let urlRequest = URLRequest(url: url)
let expectation = expectation(description: "\(url)")
var response: HTTPURLResponse?
// When
session.request(urlRequest)
.response { resp in
response = resp.response
expectation.fulfill()
}
.resume()
waitForExpectations(timeout: timeout)
// Then
XCTAssertNotNil(response, "response should not be nil")
XCTAssertTrue(response?.statusCode == 200, "response status code should be 200")
}
func testSetStartRequestsImmediatelyToFalseAndCancelledCallsResponseHandlers() {
// Given
let session = Session(startRequestsImmediately: false)
let url = Endpoint().url
let urlRequest = URLRequest(url: url)
let expectation = expectation(description: "\(url)")
var response: DataResponse<Data?, AFError>?
// When
let request = session.request(urlRequest)
.cancel()
.response { resp in
response = resp
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertNotNil(response, "response should not be nil")
XCTAssertTrue(request.isCancelled)
XCTAssertTrue((request.task == nil) || (request.task?.state == .canceling || request.task?.state == .completed))
XCTAssertEqual(request.error?.isExplicitlyCancelledError, true)
}
func testSetStartRequestsImmediatelyToFalseAndResumeThenCancelRequestHasCorrectOutput() {
// Given
let session = Session(startRequestsImmediately: false)
let url = Endpoint().url
let urlRequest = URLRequest(url: url)
let expectation = expectation(description: "\(url)")
var response: DataResponse<Data?, AFError>?
// When
let request = session.request(urlRequest)
.response { resp in
response = resp
expectation.fulfill()
}
.resume()
.cancel()
waitForExpectations(timeout: timeout)
// Then
XCTAssertNotNil(response, "response should not be nil")
XCTAssertTrue(request.isCancelled)
XCTAssertTrue((request.task == nil) || (request.task?.state == .canceling || request.task?.state == .completed))
XCTAssertEqual(request.error?.isExplicitlyCancelledError, true)
}
func testSetStartRequestsImmediatelyToFalseAndCancelThenResumeRequestDoesntCreateTaskAndStaysCancelled() {
// Given
let session = Session(startRequestsImmediately: false)
let url = Endpoint().url
let urlRequest = URLRequest(url: url)
let expectation = expectation(description: "\(url)")
var response: DataResponse<Data?, AFError>?
// When
let request = session.request(urlRequest)
.response { resp in
response = resp
expectation.fulfill()
}
.cancel()
.resume()
waitForExpectations(timeout: timeout)
// Then
XCTAssertNotNil(response, "response should not be nil")
XCTAssertTrue(request.isCancelled)
XCTAssertTrue((request.task == nil) || (request.task?.state == .canceling || request.task?.state == .completed))
XCTAssertEqual(request.error?.isExplicitlyCancelledError, true)
}
// MARK: Tests - Deinitialization
func testReleasingManagerWithPendingRequestDeinitializesSuccessfully() {
// Given
let monitor = ClosureEventMonitor()
let didCreateRequest = expectation(description: "Request created")
monitor.requestDidCreateTask = { _, _ in didCreateRequest.fulfill() }
var session: Session? = Session(startRequestsImmediately: false, eventMonitors: [monitor])
weak var weakSession = session
// When
let request = session?.request(.default)
session = nil
waitForExpectations(timeout: timeout)
// Then
if #available(macOS 13, iOS 16, tvOS 16, watchOS 9, *) {
// On 2022 OS versions and later, URLSessionTasks are completed even if not resumed before invalidating a session.
XCTAssertTrue([.canceling, .completed].contains(request?.task?.state))
} else {
XCTAssertEqual(request?.task?.state, .suspended)
}
XCTAssertNil(session, "session should be nil")
XCTAssertNil(weakSession, "weak session should be nil")
}
func testReleasingManagerWithPendingCanceledRequestDeinitializesSuccessfully() {
// Given
var session: Session? = Session(startRequestsImmediately: false)
// When
let request = session?.request(.default)
request?.cancel()
session = nil
let state = request?.state
// Then
XCTAssertTrue(state == .cancelled, "state should be .cancelled")
XCTAssertNil(session, "manager should be nil")
}
// MARK: Tests - Bad Requests
func testThatDataRequestWithInvalidURLStringThrowsResponseHandlerError() {
// Given
let session = Session()
let url = ""
let expectation = expectation(description: "Request should fail with error")
var response: DataResponse<Data?, AFError>?
// When
session.request(url).response { resp in
response = resp
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertNil(response?.request)
XCTAssertNil(response?.response)
XCTAssertNil(response?.data)
XCTAssertNotNil(response?.error)
XCTAssertEqual(response?.error?.isInvalidURLError, true)
XCTAssertEqual(response?.error?.urlConvertible as? String, url)
}
func testThatDownloadRequestWithInvalidURLStringThrowsResponseHandlerError() {
// Given
let session = Session()
let url = ""
let expectation = expectation(description: "Download should fail with error")
var response: DownloadResponse<URL?, AFError>?
// When
session.download(url).response { resp in
response = resp
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertNil(response?.request)
XCTAssertNil(response?.response)
XCTAssertNil(response?.fileURL)
XCTAssertNil(response?.resumeData)
XCTAssertNotNil(response?.error)
XCTAssertEqual(response?.error?.isInvalidURLError, true)
XCTAssertEqual(response?.error?.urlConvertible as? String, url)
}
func testThatUploadDataRequestWithInvalidURLStringThrowsResponseHandlerError() {
// Given
let session = Session()
let url = ""
let expectation = expectation(description: "Upload should fail with error")
var response: DataResponse<Data?, AFError>?
// When
session.upload(Data(), to: url).response { resp in
response = resp
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertNil(response?.request)
XCTAssertNil(response?.response)
XCTAssertNil(response?.data)
XCTAssertNotNil(response?.error)
XCTAssertEqual(response?.error?.isInvalidURLError, true)
XCTAssertEqual(response?.error?.urlConvertible as? String, url)
}
func testThatUploadFileRequestWithInvalidURLStringThrowsResponseHandlerError() {
// Given
let session = Session()
let url = ""
let expectation = expectation(description: "Upload should fail with error")
var response: DataResponse<Data?, AFError>?
// When
session.upload(URL(fileURLWithPath: "/invalid"), to: url).response { resp in
response = resp
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertNil(response?.request)
XCTAssertNil(response?.response)
XCTAssertNil(response?.data)
XCTAssertNotNil(response?.error)
XCTAssertEqual(response?.error?.isInvalidURLError, true)
XCTAssertEqual(response?.error?.urlConvertible as? String, url)
}
func testThatUploadStreamRequestWithInvalidURLStringThrowsResponseHandlerError() {
// Given
let session = Session()
let url = ""
let expectation = expectation(description: "Upload should fail with error")
var response: DataResponse<Data?, AFError>?
// When
session.upload(InputStream(data: Data()), to: url).response { resp in
response = resp
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertNil(response?.request)
XCTAssertNil(response?.response)
XCTAssertNil(response?.data)
XCTAssertNotNil(response?.error)
XCTAssertEqual(response?.error?.isInvalidURLError, true)
XCTAssertEqual(response?.error?.urlConvertible as? String, url)
}
// MARK: Tests - Request Adapter
func testThatSessionCallsRequestAdaptersWhenCreatingDataRequest() {
// Given
let endpoint = Endpoint()
let methodAdapter = HTTPMethodAdapter(method: .post)
let headerAdapter = HeaderAdapter()
let monitor = ClosureEventMonitor()
let session = Session(startRequestsImmediately: false, interceptor: methodAdapter, eventMonitors: [monitor])
// When
let expectation1 = expectation(description: "Request 1 created")
monitor.requestDidCreateTask = { _, _ in expectation1.fulfill() }
let request1 = session.request(endpoint)
waitForExpectations(timeout: timeout)
let expectation2 = expectation(description: "Request 2 created")
monitor.requestDidCreateTask = { _, _ in expectation2.fulfill() }
let request2 = session.request(endpoint, interceptor: headerAdapter)
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(request1.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.allHTTPHeaderFields?.count, 1)
XCTAssertEqual(methodAdapter.adaptedCount, 2)
XCTAssertEqual(headerAdapter.adaptedCount, 1)
}
func testThatSessionCallsRequestAdaptersWhenCreatingDownloadRequest() {
// Given
let endpoint = Endpoint()
let methodAdapter = HTTPMethodAdapter(method: .post)
let headerAdapter = HeaderAdapter()
let monitor = ClosureEventMonitor()
let session = Session(startRequestsImmediately: false, interceptor: methodAdapter, eventMonitors: [monitor])
// When
let expectation1 = expectation(description: "Request 1 created")
monitor.requestDidCreateTask = { _, _ in expectation1.fulfill() }
let request1 = session.download(endpoint)
waitForExpectations(timeout: timeout)
let expectation2 = expectation(description: "Request 2 created")
monitor.requestDidCreateTask = { _, _ in expectation2.fulfill() }
let request2 = session.download(endpoint, interceptor: headerAdapter)
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(request1.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.allHTTPHeaderFields?.count, 1)
XCTAssertEqual(methodAdapter.adaptedCount, 2)
XCTAssertEqual(headerAdapter.adaptedCount, 1)
}
func testThatSessionCallsRequestAdaptersWhenCreatingUploadRequestWithData() {
// Given
let data = Data("data".utf8)
let endpoint = Endpoint.method(.post)
let methodAdapter = HTTPMethodAdapter(method: .get)
let headerAdapter = HeaderAdapter()
let monitor = ClosureEventMonitor()
let session = Session(startRequestsImmediately: false, interceptor: methodAdapter, eventMonitors: [monitor])
// When
let expectation1 = expectation(description: "Request 1 created")
monitor.requestDidCreateTask = { _, _ in expectation1.fulfill() }
let request1 = session.upload(data, to: endpoint)
waitForExpectations(timeout: timeout)
let expectation2 = expectation(description: "Request 2 created")
monitor.requestDidCreateTask = { _, _ in expectation2.fulfill() }
let request2 = session.upload(data, to: endpoint, interceptor: headerAdapter)
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(request1.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.allHTTPHeaderFields?.count, 1)
XCTAssertEqual(methodAdapter.adaptedCount, 2)
XCTAssertEqual(headerAdapter.adaptedCount, 1)
}
func testThatSessionCallsRequestAdaptersWhenCreatingUploadRequestWithFile() {
// Given
let fileURL = URL(fileURLWithPath: "/path/to/some/file.txt")
let endpoint = Endpoint.method(.post)
let methodAdapter = HTTPMethodAdapter(method: .get)
let headerAdapter = HeaderAdapter()
let monitor = ClosureEventMonitor()
let session = Session(startRequestsImmediately: false, interceptor: methodAdapter, eventMonitors: [monitor])
// When
let expectation1 = expectation(description: "Request 1 created")
monitor.requestDidCreateTask = { _, _ in expectation1.fulfill() }
let request1 = session.upload(fileURL, to: endpoint)
waitForExpectations(timeout: timeout)
let expectation2 = expectation(description: "Request 2 created")
monitor.requestDidCreateTask = { _, _ in expectation2.fulfill() }
let request2 = session.upload(fileURL, to: endpoint, interceptor: headerAdapter)
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(request1.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.allHTTPHeaderFields?.count, 1)
XCTAssertEqual(methodAdapter.adaptedCount, 2)
XCTAssertEqual(headerAdapter.adaptedCount, 1)
}
func testThatSessionCallsRequestAdaptersWhenCreatingUploadRequestWithInputStream() {
// Given
let inputStream = InputStream(data: Data("data".utf8))
let endpoint = Endpoint.method(.post)
let methodAdapter = HTTPMethodAdapter(method: .get)
let headerAdapter = HeaderAdapter()
let monitor = ClosureEventMonitor()
let session = Session(startRequestsImmediately: false, interceptor: methodAdapter, eventMonitors: [monitor])
// When
let expectation1 = expectation(description: "Request 1 created")
monitor.requestDidCreateTask = { _, _ in expectation1.fulfill() }
let request1 = session.upload(inputStream, to: endpoint)
waitForExpectations(timeout: timeout)
let expectation2 = expectation(description: "Request 2 created")
monitor.requestDidCreateTask = { _, _ in expectation2.fulfill() }
let request2 = session.upload(inputStream, to: endpoint, interceptor: headerAdapter)
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(request1.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.httpMethod, methodAdapter.method.rawValue)
XCTAssertEqual(request2.task?.originalRequest?.allHTTPHeaderFields?.count, 1)
XCTAssertEqual(methodAdapter.adaptedCount, 2)
XCTAssertEqual(headerAdapter.adaptedCount, 1)
}
func testThatSessionReturnsRequestAdaptationErrorWhenRequestAdapterThrowsError() {
// Given
let endpoint = Endpoint()
let methodAdapter = HTTPMethodAdapter(method: .post, throwsError: true)
let headerAdapter = HeaderAdapter(throwsError: true)
let monitor = ClosureEventMonitor()
let session = Session(startRequestsImmediately: false, interceptor: methodAdapter, eventMonitors: [monitor])
// When
let expectation1 = expectation(description: "Request 1 created")
monitor.requestDidFailToAdaptURLRequestWithError = { _, _, _ in expectation1.fulfill() }
let request1 = session.request(endpoint)
waitForExpectations(timeout: timeout)
let expectation2 = expectation(description: "Request 2 created")
monitor.requestDidFailToAdaptURLRequestWithError = { _, _, _ in expectation2.fulfill() }
let request2 = session.request(endpoint, interceptor: headerAdapter)
waitForExpectations(timeout: timeout)
let requests = [request1, request2]
// Then
for request in requests {
XCTAssertEqual(request.error?.isRequestAdaptationError, true)
XCTAssertEqual(request.error?.underlyingError?.asAFError?.urlConvertible as? String, "")
}
}
// MARK: Tests - Request Retrier
func testThatSessionCallsRequestRetrierWhenRequestInitiallyEncountersAdaptError() {
// Given
let handler = RequestHandler()
handler.adaptedCount = 1
handler.throwsErrorOnSecondAdapt = true
handler.shouldApplyAuthorizationHeader = true
let session = Session()
let expectation = expectation(description: "request should eventually fail")
var response: DataResponse<TestResponse, AFError>?
// When
session.request(.basicAuth(), interceptor: handler)
.validate()
.responseDecodable(of: TestResponse.self) { jsonResponse in
response = jsonResponse
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(handler.adaptCalledCount, 2)
XCTAssertEqual(handler.adaptedCount, 2)
XCTAssertEqual(handler.retryCalledCount, 1)
XCTAssertEqual(handler.retryCount, 1)
XCTAssertEqual(response?.result.isSuccess, true)
assert(on: session.rootQueue) {
XCTAssertTrue(session.requestTaskMap.isEmpty)
XCTAssertTrue(session.activeRequests.isEmpty)
}
}
func testThatSessionCallsRequestRetrierWhenDownloadInitiallyEncountersAdaptError() {
// Given
let handler = RequestHandler()
handler.adaptedCount = 1
handler.throwsErrorOnSecondAdapt = true
handler.shouldApplyAuthorizationHeader = true
let session = Session()
let expectation = expectation(description: "request should eventually fail")
var response: DownloadResponse<TestResponse, AFError>?
let destination: DownloadRequest.Destination = { _, _ in
let fileURL = self.testDirectoryURL.appendingPathComponent("test-output.json")
return (fileURL, [.removePreviousFile])
}
// When
session.download(.basicAuth(), interceptor: handler, to: destination)
.validate()
.responseDecodable(of: TestResponse.self) { jsonResponse in
response = jsonResponse
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(handler.adaptCalledCount, 2)
XCTAssertEqual(handler.adaptedCount, 2)
XCTAssertEqual(handler.retryCalledCount, 1)
XCTAssertEqual(handler.retryCount, 1)
XCTAssertEqual(response?.result.isSuccess, true)
assert(on: session.rootQueue) {
XCTAssertTrue(session.requestTaskMap.isEmpty)
XCTAssertTrue(session.activeRequests.isEmpty)
}
}
func testThatSessionCallsRequestRetrierWhenUploadInitiallyEncountersAdaptError() {
// Given
let handler = UploadHandler()
let session = Session(interceptor: handler)
let expectation = expectation(description: "request should eventually fail")
var response: DataResponse<TestResponse, AFError>?
let uploadData = Data("upload data".utf8)
// When
session.upload(uploadData, to: .method(.post))
.validate()
.responseDecodable(of: TestResponse.self) { jsonResponse in
response = jsonResponse
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(handler.adaptCalledCount, 2)
XCTAssertEqual(handler.adaptedCount, 2)
XCTAssertEqual(handler.retryCalledCount, 1)
XCTAssertEqual(handler.retryCount, 1)
XCTAssertEqual(response?.result.isSuccess, true)
assert(on: session.rootQueue) {
XCTAssertTrue(session.requestTaskMap.isEmpty)
XCTAssertTrue(session.activeRequests.isEmpty)
}
}
func testThatSessionCallsRequestRetrierWhenRequestEncountersError() {
// Given
let handler = RequestHandler()
let session = Session()
let expectation = expectation(description: "request should eventually fail")
var response: DataResponse<TestResponse, AFError>?
// When
let request = session.request(.basicAuth(), interceptor: handler)
.validate()
.responseDecodable(of: TestResponse.self) { jsonResponse in
response = jsonResponse
expectation.fulfill()
}
waitForExpectations(timeout: timeout)
// Then
XCTAssertEqual(handler.adaptCalledCount, 2)
XCTAssertEqual(handler.adaptedCount, 2)
XCTAssertEqual(handler.retryCalledCount, 3)
XCTAssertEqual(handler.retryCount, 3)
XCTAssertEqual(request.retryCount, 1)
XCTAssertEqual(response?.result.isSuccess, false)
assert(on: session.rootQueue) {
XCTAssertTrue(session.requestTaskMap.isEmpty)
XCTAssertTrue(session.activeRequests.isEmpty)
}
}
func testThatSessionCallsRequestRetrierThenSessionRetrierWhenRequestEncountersError() {
// Given
let sessionHandler = RequestHandler()
let requestHandler = RequestHandler()
let session = Session(interceptor: sessionHandler)
let expectation = expectation(description: "request should eventually fail")
var response: DataResponse<TestResponse, AFError>?
// When
let request = session.request(.basicAuth(), interceptor: requestHandler)
.validate()