Question

我试图断言异步方法中发生的异常不幸的是，断言不起作用。

我确保通过调试确保在throw new Exception(...)方法中调用SaveCategoriesAsync(...)。

使用Action的方法通常适用于单元测试...但似乎它不能用于异步。

我使用 FakeItEasy 作为模拟框架，使用 FluentAssertions 作为断言框架。

[TestMethod]
public void SaveCategoriesAsync_When_Then()
{
    A.CallTo(() => this.articleRepository.GetArticles(A<IList<long>>._)).Returns(new List<ArticleModel>());

    Action action = async () => await this.testee.SaveCategoriesAsync(new List<int>());

    action.ShouldThrow<Exception>();
}

我必须更改什么才能断言异常？

提前致谢

Answer 1

答案实际上与我的尝试非常相似。但是使用异步，您必须使用<head>  <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.min.js"></script> <script> //angular module code angular .module('myApp', []) .run(function($rootScope) { $rootScope.title = 'myTest Page'; }) .controller('testController', ['$scope', function($scope) { //dummy array data $scope.mydata = [ { "cID": 1014,"country": "USA","state" :"California"} ]; //country json to get selected state and city based on country $scope.countries = { 'USA': { 'Alabama': ['Montgomery', 'Birmingham'], 'California': ['Sacramento', 'Fremont'], 'Illinois': ['Springfield', 'Chicago'] }, 'Australia': { 'New South Wales': ['Sydney'], 'Victoria': ['Melbourne'] } }; $scope.GetSelectedCountry = function() { $scope.strCountry = $scope.country; }; $scope.GetSelectedState = function() { $scope.strState = $scope.state; }; } ])</script></head>  <body ng-app="myApp"> <div ng-controller="testController"> <label for="country">Country *</label> <select id="country" name="country" ng-model="mydata .country" ng-options="country for (country, states) in countries" ng-change="GetSelectedCountry()"> <option value=''>Select</option></select> <label for="state">State *</label> <select id="state" ng-disabled="!country" name="state" ng-model="mydata.state" ng-options="state for (state,city) in country" ng-change="GetSelectedState()"> <option value=''>Select</option></select> <label for="city">City *</label> <select id="city" ng-disabled="!country || !state" ng-model="city" ng-options="city for city in state"> <option value=''>Select</option> </select> </div> </body>而不是操作：

Func<Task>

Answer 2

如果很容易更改测试运行器，请考虑NUnit。然后你的代码看起来：

...
Assert.ThrowsAsync<Exception>(async () => await this.testee.SaveCategoriesAsync(new List<int>());
...

单元测试在异步方法中抛出异常

2 个答案: