firebase-ios-sdk/FirebaseAuth/Tests/Unit/SignInWithGameCenterTests.swift

// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import Foundation
import XCTest

@testable import FirebaseAuth

@available(iOS 13, tvOS 13, macOS 10.15, macCatalyst 13, watchOS 7, *)
class SignInWithGameCenterTests: RPCBaseTests {
  private let kEmailKey = "email"
  private let kTestEmail = "testgmail.com"
  private let kDisplayNameKey = "displayName"
  private let kTestDisplayName = "DisplayName"
  private let kPasswordKey = "password"
  private let kTestPassword = "Password"
  private let kReturnSecureTokenKey = "returnSecureToken"
  private let kExpectedAPIURL =
    "https://www.googleapis.com/identitytoolkit/v3/relyingparty/signInWithGameCenter?key=APIKey"
  let kIDToken = "IDTOKEN"
  let kTeamPlayerIDKey = "teamPlayerId"
  let kTeamPlayerID = "TEAMPLAYERID"
  let kGamePlayerIDKey = "gamePlayerId"
  let kGamePlayerID = "GAMEPLAYERID"
  let kApproximateExpirationDate = "3600"
  let kPublicKeyURLKey = "publicKeyUrl"
  let kPublicKeyURL = "PUBLICKEYURL"
  let kSignatureKey = "signature"
  let kSignature = "AAAABBBBCCCC"
  let kSaltKey = "salt"
  let kSalt = "AAAA"
  let kTimestampKey = "timestamp"
  let kTimestamp = UInt64(12_345_678)
  let kAccessTokenKey = "idToken"
  let kAccessToken = "ACCESSTOKEN"

  /** @fn testSignInWithGameCenterRequestAnonymous
      @brief Tests the encoding of a sign up new user request when user is signed in anonymously.
   */
  func testRequestResponseEncoding() throws {
    let kRefreshToken = "PUBLICKEYURL"
    let kLocalID = "LOCALID"
    let kDisplayNameKey = "displayName"
    let kDisplayName = "DISPLAYNAME"
    var callbackInvoked = false
    var rpcResponse: SignInWithGameCenterResponse?
    var rpcError: NSError?

    let signature = try XCTUnwrap(Data(base64Encoded: kSignature))
    let salt = try XCTUnwrap(Data(base64URLEncoded: kSalt))
    let request = SignInWithGameCenterRequest(teamPlayerID: kTeamPlayerID,
                                              gamePlayerID: kGamePlayerID,
                                              publicKeyURL: try XCTUnwrap(
                                                URL(string: kPublicKeyURL)
                                              ),
                                              signature: signature,
                                              salt: salt,
                                              timestamp: kTimestamp,
                                              displayName: kDisplayName,
                                              requestConfiguration: makeRequestConfiguration())
    request.accessToken = kAccessToken
    let issuer = try checkRequest(
      request: request,
      expected: kExpectedAPIURL,
      key: kTeamPlayerIDKey,
      value: kTeamPlayerID
    )
    let requestDictionary = try XCTUnwrap(issuer.decodedRequest as? [String: AnyHashable])
    XCTAssertEqual(requestDictionary[kGamePlayerIDKey], kGamePlayerID)
    XCTAssertEqual(requestDictionary[kPublicKeyURLKey], kPublicKeyURL)
    XCTAssertEqual(requestDictionary[kSignatureKey], kSignature)
    XCTAssertEqual(requestDictionary[kSaltKey], kSalt)
    XCTAssertEqual(requestDictionary[kTimestampKey], kTimestamp)
    XCTAssertEqual(requestDictionary[kAccessTokenKey], kAccessToken)
    XCTAssertEqual(requestDictionary[kDisplayNameKey], kDisplayName)

    AuthBackend.post(withRequest: request) { response, error in
      callbackInvoked = true
      rpcResponse = response as? SignInWithGameCenterResponse
      rpcError = error as? NSError
    }

    _ = try rpcIssuer?.respond(withJSON: [
      "idToken": kIDToken,
      "refreshToken": kRefreshToken,
      "localId": kLocalID,
      "teamPlayerId": kTeamPlayerID,
      "gamePlayerId": kGamePlayerID,
      "expiresIn": kApproximateExpirationDate,
      "isNewUser": true,
      "displayName": kDisplayName,
    ])

    XCTAssert(callbackInvoked)
    XCTAssertNil(rpcError)
    XCTAssertEqual(rpcResponse?.idToken, kIDToken)
    XCTAssertEqual(rpcResponse?.refreshToken, kRefreshToken)
    XCTAssertEqual(rpcResponse?.localID, kLocalID)
    XCTAssertEqual(rpcResponse?.teamPlayerID, kTeamPlayerID)
    XCTAssertEqual(rpcResponse?.gamePlayerID, kGamePlayerID)
    XCTAssertEqual(rpcResponse?.displayName, kDisplayName)
    XCTAssertTrue(try XCTUnwrap(rpcResponse?.isNewUser))
  }

  #if !os(watchOS)
    /** @fn testGameCenterAuthCredentialCoding
        @brief Tests successful archiving and unarchiving of @c GameCenterAuthCredential.
     */
    func testGameCenterAuthCredentialCoding() throws {
      let credential = try makeGameCenterCredential()
      XCTAssertTrue(GameCenterAuthCredential.supportsSecureCoding)
      let data = try NSKeyedArchiver.archivedData(
        withRootObject: credential,
        requiringSecureCoding: true
      )
      let unarchivedCredential = try XCTUnwrap(NSKeyedUnarchiver.unarchivedObject(
        ofClasses: [NSURL.self, GameCenterAuthCredential.self], from: data
      ) as? GameCenterAuthCredential)
      XCTAssertEqual(unarchivedCredential.teamPlayerID, kTeamPlayerID)
      XCTAssertEqual(unarchivedCredential.gamePlayerID, kGamePlayerID)
      XCTAssertEqual(unarchivedCredential.publicKeyURL, URL(string: kPublicKeyURL))
      XCTAssertEqual(String(data: try XCTUnwrap(unarchivedCredential.signature),
                            encoding: .utf8), kSignature)
      XCTAssertEqual(String(data: try XCTUnwrap(unarchivedCredential.salt), encoding: .utf8), kSalt)
      XCTAssertEqual(unarchivedCredential.timestamp, kTimestamp)
      XCTAssertEqual(unarchivedCredential.displayName, kDisplayName)
    }

    private func makeGameCenterCredential() throws -> GameCenterAuthCredential {
      let signature = try XCTUnwrap(kSignature.data(using: .utf8))
      let salt = try XCTUnwrap(kSalt.data(using: .utf8))
      return GameCenterAuthCredential(teamPlayerID: kTeamPlayerID,
                                      gamePlayerID: kGamePlayerID,
                                      publicKeyURL: try XCTUnwrap(
                                        URL(string: kPublicKeyURL)
                                      ),
                                      signature: signature,
                                      salt: salt,
                                      timestamp: kTimestamp,
                                      displayName: kDisplayName)
    }
  #endif
}