如何对ActionFilterAttribute进行单元测试 [英] How to unit test ActionFilterAttribute
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问题描述
我正在尝试在.NET Core 2.0 API项目中测试ActionFilterAttribute,并想知道解决该问题的最佳方法。注意,我不是在尝试通过控制器操作来测试它,而只是在测试ActionFilterAttribute本身。
我该如何测试呢?
公共类ValidateModelAttribute:ActionFilterAttribute
{
公共重写void OnActionExecuting(ActionExecutingContext context)
{
if (!context.ModelState.IsValid)
{
context.Result = new BadRequestObjectResult(context.ModelState);
}
}
}
解决方案
创建上下文实例,将其传递到过滤器并声明预期的行为
例如
< pre class = lang-cs prettyprint-override>
[TestClass]
公共类ValidateModelAttributeTest {
[TestMethod]
public void Invalid_ModelState_Should_Return_BadRequestObjectResult(){
//安排
var modelState = new ModelStateDictionary();
modelState.AddModelError(,错误);
var httpContext = new DefaultHttpContext();
var context = new ActionExecutingContext(
new ActionContext(
httpContext:httpContext,
routeData:new RouteData(),
actionDescriptor:new ActionDescriptor(),
modelState:modelState
),
新的List< IFilterMetadata>(),
新的Dictionary< string,object>(),
新的Mock< Controller>()。Object) ;
var sut = new ValidateModelAttribute();
//执行
sut.OnActionExecuting(context);
//声明
context.Result.Should()。NotBeNull()
.And.BeOfType< BadRequestObjectResult>();
}
}
I'm looking to test an ActionFilterAttribute in a .NET Core 2.0 API project and wondering the best way to go about it. Note, I'm not trying to test this through a controller action, merely test the ActionFilterAttribute itself.
How might I go about testing this:
public class ValidateModelAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext context)
{
if (!context.ModelState.IsValid)
{
context.Result = new BadRequestObjectResult(context.ModelState);
}
}
}
解决方案
Create an instance of the context pass it to the filter and assert the expected behavior
For example
[TestClass]
public class ValidateModelAttributeTest {
[TestMethod]
public void Invalid_ModelState_Should_Return_BadRequestObjectResult() {
//Arrange
var modelState = new ModelStateDictionary();
modelState.AddModelError("", "error");
var httpContext = new DefaultHttpContext();
var context = new ActionExecutingContext(
new ActionContext(
httpContext: httpContext,
routeData: new RouteData(),
actionDescriptor: new ActionDescriptor(),
modelState: modelState
),
new List<IFilterMetadata>(),
new Dictionary<string, object>(),
new Mock<Controller>().Object);
var sut = new ValidateModelAttribute();
//Act
sut.OnActionExecuting(context);
//Assert
context.Result.Should().NotBeNull()
.And.BeOfType<BadRequestObjectResult>();
}
}
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