chrome/browser/ui/cocoa/test/run_loop_testing.mm

// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/ui/cocoa/test/run_loop_testing.h"

#import <Foundation/Foundation.h>

#include <memory>

#include "base/memory/raw_ptr.h"
#include "base/message_loop/message_pump_apple.h"

// This class is scheduled with a delayed selector to quit the message pump.
@interface CocoaQuitTask : NSObject {
 @private
  raw_ptr<base::MessagePumpNSRunLoop> _pump;
}
- (instancetype)initWithMessagePump:(base::MessagePumpNSRunLoop*)pump;
- (void)doQuit;
@end

@implementation CocoaQuitTask
- (instancetype)initWithMessagePump:(base::MessagePumpNSRunLoop*)pump {
  if ((self = [super init])) {
    _pump = pump;
  }
  return self;
}

- (void)doQuit {
  _pump->Quit();
}
@end

////////////////////////////////////////////////////////////////////////////////

namespace chrome::testing {

void NSRunLoopRunAllPending() {
  auto message_pump = std::make_unique<base::MessagePumpNSRunLoop>();

  // Put a delayed selector on the queue. All other pending delayed selectors
  // will run before this, after which the internal loop can end.
  CocoaQuitTask* quit_task =
      [[CocoaQuitTask alloc] initWithMessagePump:message_pump.get()];

  [quit_task performSelector:@selector(doQuit) withObject:nil afterDelay:0];

  // Spin the internal loop, running it until the quit task is pumped. Pass
  // nullptr because there is no delegate MessageLoop; only the Cocoa work
  // queues will be pumped.
  message_pump->Run(nullptr);
}

}  // namespace chrome::testing