[英]Is there a way to unit test Touch Id using XCTest?
有沒有辦法使用XCTest對TouchId的“evaluatePolicy”或“canevaluatePolicy”進行單元測試? 我想用模擬器作為基礎進行單元測試。
謝謝
我已經描述了在這篇文章中為Touch ID代碼編寫單元測試的一種方法。
基本上,如果你有一個類似於這個的Touch ID管理類:
final public class TouchIDManager {
/// Authentication context object we use for Touch ID. Typically it's just a `LAContext` instance that is mocked when testing.
internal var authenticationContext = LAContext()
/**
Checks Touch ID availability.
- returns: Flag indicating if Touch ID is available
*/
public func touchIDAvailable() -> Bool {
return authenticationContext.canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, error: nil)
}
/**
Authenticates the user with Touch ID
- parameter completion: Completion handler
*/
public func authenticate(completion: (success: Bool) -> ()) {
guard touchIDAvailable() else {
completion(false)
return
}
authenticationContext.evaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, localizedReason: "Wanna Touch my ID?") {
(success: Bool, error: NSError?) -> Void in
completion(success: success)
}
}
}
您可以使用StubLAContext
類偽造LAContext
行為:
func testSuccessfulAuthentication() {
/// A class faking Touch ID availability and successful user verification
class StubLAContext: LAContext {
override func evaluatePolicy(policy: LAPolicy, localizedReason: String, reply: (Bool, NSError?) -> Void) { reply(true, nil) }
override func canEvaluatePolicy(policy: LAPolicy, error: NSErrorPointer) -> Bool { return true }
}
let manager = TouchIDManager()
manager.authenticationContext = StubLAContext()
manager.authenticate { (success) in
XCTAssertTrue(success)
}
}
顯然,這個特定的測試沒有多大作用,但它可能是測試應用程序中其他Touch ID相關邏輯的一個很好的起點。
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