c# - How to get the Values from a Task returned through an API for Unit Testing

Question

I have created an API using ASP.NET MVC Core v2.1. One of my HttpGet methods is set up as follows:

public async Task<IActionResult> GetConfiguration([FromRoute] int? id)
{
    try
    {
        if (!ModelState.IsValid)
        {
            return BadRequest(ModelState);
        }

        ..... // Some code here

        return Ok(configuration);
    }
    catch (Exception ex)
    {
        ... // Some code here
    }
}

When unit testing this I can check that Ok was the response, but I really need to see the values of the configuration. I don't seem to be able to get this to work with the following:

[TestMethod] 
public void ConfigurationSearchGetTest()
{
    var context = GetContextWithData();
    var controller = new ConfigurationSearchController(context);
    var items = context.Configurations.Count();
    var actionResult = controller.GetConfiguration(12);

    Assert.IsTrue(true);
    context.Dispose();
}

At runtime, I can check that actionResult has certain values that I am unable to code for. Is there something I am doing wrong? Or am I just thinking about this wrong? I would like to be able to do:

Assert.AreEqual(12, actionResult.Values.ConfigurationId);

标签： c#.net-coreasp.net-core-mvc

Answer 1

您可以在不更改返回类型的情况下获得经过测试的控制器。
IActionResult是所有其他人的基本类型。
将结果转换为预期类型并将返回值与预期进行比较。

由于您正在测试异步方法，因此也要使测试方法异步。

[TestMethod] 
public async Task ConfigurationSearchGetTest()
{
    using (var context = GetContextWithData())
    {
        var controller = new ConfigurationSearchController(context);
        var items = context.Configurations.Count();

        var actionResult = await controller.GetConfiguration(12);

        var okResult = actionResult as OkObjectResult;
        var actualConfiguration = okResult.Value as Configuration;

        // Now you can compare with expected values
        actualConfuguration.Should().BeEquivalentTo(expected);
    }
}