firebase-ios-sdk/FirebaseCombineSwift/Tests/Unit/GKLocalPlayer+Tests.swift

// Copyright 2021 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 GameKit

extension GKLocalPlayer {
  class func mock(with cls: GKLocalPlayer.Type) {
    guard let original = class_getClassMethod(GKLocalPlayer.self, #selector(getter: local)),
          let swizzled = class_getClassMethod(cls, #selector(getter: local))
    else { return }
    method_exchangeImplementations(original, swizzled)
  }
}