使用$timeout进行Angular + Jasmine测试

$timeout(fn, delay, [invokeApply], [Pass]);

describe('MyController', function() {
  var $controller, $timeout;

  beforeEach(module('myApp'));

  beforeEach(inject(function(_$controller_, _$timeout_) {
    $controller = _$controller_;
    $timeout = _$timeout_;
  }));

  it('should update the message after a delay', function() {
    var $scope = {};
    var controller = $controller('MyController', { $scope: $scope });

    // 模拟异步操作的延迟
    $timeout.flush(1000);

    // 断言期望的结果
    expect($scope.message).toBe('Hello, World!');
  });
});