我有一个带有两个按钮的简单应用程序,它们调用JSON Web服务并打印出结果消息。
我想尝试新的XCode 7 UI测试,但我无法理解如何模拟API请求。
为简单起见,我构建了一个没有实际请求或任何异步操作的示例。
我在主目标中有ZZSomeAPI.swift
个文件:
import Foundation
public class ZZSomeAPI: NSObject {
public class func call(parameter:String) -> Bool {
return true
}
}
然后是我的ZZSomeClientViewController.swift
:
import UIKit
class ZZSomeClientViewController: UIViewController {
@IBAction func buttonClick(sender: AnyObject) {
print(ZZSomeAPI.call("A"))
}
}
现在我添加了一个UITest目标,记录了点击按钮,我有类似的东西:
import XCTest
class ZZSomeClientUITests: XCTestCase {
override func setUp() {
super.setUp()
continueAfterFailure = false
XCUIApplication().launch()
}
func testCall() {
let app = XCUIApplication()
app.childrenMatchingType(.Window).elementBoundByIndex(0).childrenMatchingType(.Other).element.childrenMatchingType(.Other).elementBoundByIndex(1).childrenMatchingType(.Button).elementBoundByIndex(0).tap()
}
}
这样可行并运行测试将打印出true
。但是我希望在API返回false
时包含测试,而不会弄乱API。所以,我将ZZSomeAPI.swift
添加到UI测试目标并尝试了方法调配(更新了UITest代码):
import XCTest
class ZZSomeClientUITests: XCTestCase {
override func setUp() {
super.setUp()
continueAfterFailure = false
XCUIApplication().launch()
}
func testSwizzle() {
XCTAssert(ZZSomeAPI.call("a"))
XCTAssertFalse(ZZSomeAPI.callMock("a"))
XCTAssert(ZZSomeAPI.swizzleClass("call", withSelector: "callMock", forClass: ZZSomeAPI.self))
XCTAssertFalse(ZZSomeAPI.call("a"), "failed swizzle")
}
func testCall() {
XCTAssert(ZZSomeAPI.swizzleClass("call", withSelector: "callMock", forClass: ZZSomeAPI.self))
let app = XCUIApplication()
app.childrenMatchingType(.Window).elementBoundByIndex(0).childrenMatchingType(.Other).element.childrenMatchingType(.Other).elementBoundByIndex(1).childrenMatchingType(.Button).elementBoundByIndex(0).tap()
}
}
extension NSObject {
public class func swizzleClass(origSelector: String!, withSelector: String!, forClass:AnyClass!) -> Bool {
var originalMethod: Method?
var swizzledMethod: Method?
originalMethod = class_getClassMethod(forClass, Selector(origSelector))
swizzledMethod = class_getClassMethod(forClass, Selector(withSelector))
if (originalMethod == COpaquePointer(bitPattern: 0)) { return false }
if (swizzledMethod == COpaquePointer(bitPattern: 0)) { return false }
method_exchangeImplementations(originalMethod!, swizzledMethod!)
return true
}
}
extension ZZSomeAPI {
public class func callMock(parameter:String) -> Bool {
return false
}
}
所以,testSwizzle()
传递意味着混合工作。但testCall()
仍会打印true
而不是false
是因为当UITest和主要目标是两个不同的应用程序时,只在测试目标上进行调配?
有没有办法解决这个问题?
我找到了Mock API Requests Xcode 7 Swift Automated UI Testing,但我不确定如何在这里使用launchArguments
在示例中只有一种情况,但我需要针对不同的测试方法模拟call()
方法以获得不同的结果...如果我使用包含完整响应的launchArgument
,例如MOCK_API_RESPONSE
要返回,主目标应用程序委托将有一些“丑陋的测试”代码...有没有办法检查(在主目标中)它正在为UITest目标编译,所以它只包括该代码那个嘲笑launchArguments?
最干净的选择确实是调高工作......
答案 0 :(得分:3)
Xcode UI测试在与您的应用程序不同的应用程序中执行。因此,对测试运行器应用程序中的类的更改不会影响测试应用程序中的类。
这与单元测试不同,在单元测试中,测试在应用程序进程中运行。
答案 1 :(得分:2)
我已经接受了Mats的回答,因为实际的问题(在UI测试中浑浑作响)得到了回答。
但我最终使用的当前解决方案是使用在线模拟服务器http://mocky.io/,因为调模的目标是模拟远程API调用。
使用API网址的ZZSomeAPI.swift
属性更新了public
,而不是将其放入方法中:
import Foundation
public class ZZSomeAPI {
public static var apiURL: String = NSBundle.mainBundle().infoDictionary?["API_URL"] as! String
public class func call(parameter:String) -> Bool {
... use apiURL ...
}
}
然后更新了应用委托以使用launchArguments
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
if NSProcessInfo().arguments.contains("MOCK_API") { // for UI Testing
if let param = NSProcessInfo().environment["MOCK_API_URL"] {
ZZSomeAPI.apiURL = param
}
}
return true
}
}
然后在我的UI测试用例类中创建setupAPIMockWith
以在mocky.io on-demand中创建模拟响应:
import XCTest
class ZZSomeClientUITests: XCTestCase {
override func setUp() {
super.setUp()
continueAfterFailure = false
}
func setupAPIMockWith(jsonBody: NSDictionary) -> String {
let expectation = self.expectationWithDescription("mock request setup")
let request = NSMutableURLRequest(URL: NSURL(string: "http://www.mocky.io/")!)
request.HTTPMethod = "POST"
var theJSONText: NSString?
do {
let theJSONData = try NSJSONSerialization.dataWithJSONObject(jsonBody, options: NSJSONWritingOptions.PrettyPrinted)
theJSONText = NSString(data: theJSONData, encoding: NSUTF8StringEncoding)
} catch {
XCTFail("failed to serialize json body for mock setup")
}
let params = [
"statuscode": "200",
"location": "",
"contenttype": "application/json",
"charset": "UTF-8",
"body": theJSONText!
]
let body = params.map({
let key = $0.0.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())
let value = $0.1.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())
return "\(key!)=\(value!)"
}).joinWithSeparator("&")
request.HTTPBody = body.dataUsingEncoding(NSUTF8StringEncoding)
request.setValue("application/x-www-form-urlencoded; charset=utf-8", forHTTPHeaderField: "Content-Type")
var url: String?
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
data, response, error in
XCTAssertNil(error)
do {
let json: NSDictionary = try NSJSONSerialization.JSONObjectWithData(data!, options: .AllowFragments) as! NSDictionary
XCTAssertNotNil(json["url"])
url = json["url"] as? String
} catch {
XCTFail("failed to parse mock setup json")
}
expectation.fulfill()
}
task.resume()
self.waitForExpectationsWithTimeout(5, handler: nil)
XCTAssertNotEqual(url, "")
return url!
}
func testCall() {
let app = XCUIApplication()
app.launchArguments.append("MOCK_API")
app.launchEnvironment = [
"MOCK_API_URL": self.setupAPIMockWith([
"msg": [
"code": -99,
"text": "yoyo"
]
])
]
app.launch()
app.childrenMatchingType(.Window).elementBoundByIndex(0).childrenMatchingType(.Other).element.childrenMatchingType(.Other).elementBoundByIndex(1).childrenMatchingType(.Button).elementBoundByIndex(0).tap()
app.staticTexts["yoyo"].tap()
}
}