使用 NUnit 对 controller 操作进行单元测试

Question

I am building a REST API and have some controllers, that i would like to test. The problem is, for post methods, i need to mock the http request.

My post method within the controller looks like this:

    [HttpPost]
    public async Task<IActionResult> Post([FromBody] xxx xxx)
    {
       ...

       return Ok(new Link()
       {
           Id = ...,
           Href = GetPath(id)
       });
   }


private string GetPath(int id)
    {
        var displayUrl = UriHelper.GetDisplayUrl(Request);
        var urlBuilder = new UriBuilder(displayUrl)
        {
            Query = null,
            Fragment = null
        };
        return urlBuilder.ToString() + "/" + id;
    }

As you can see inside the GetPath function there is Request. This is always null and throws errors, when executing the unit test.

My unit test so far (with mocked database):

[Test]
    public async Task PostAsync_ReturnsHttpStatus200()
    {
        SaveObject object= new SaveObject
        {
            ...
        };

        var response = await controller.PostAsync(object);

        Assert.That(response, Is.InstanceOf(typeof(OkObjectResult)));
    }

I will not show the one time setup, as all the other parts of the unit test seem to work, only the previously explained problem does exist.

How do i mock the request with ASP.Net Core (.Net Core 3.1)?

Answer 1

In case anyone need, here is the solution that worked for OP.
Set controller context and path before calling it inside test.

Controller.ControllerContext = new ControllerContext                                                
{
    HttpContext = new DefaultHttpContext()
};

Controller.ControllerContext.Request.Path = new PathString("/url");