How to extract a list from an IActionResult

Question

I'm attempting to test the result from an API controller that returns an IActionResult. Currently it is returning an object with status code, value, etc. I'm trying to access just the value.

List<Batch.Context.Models.Batch> newBatch2 = new List<Batch.Context.Models.Batch>();
var actionResultTask = controller.Get();
actionResultTask.Wait();
newBatch2 = actionResultTask.Result as List<Batch.Context.Models.Batch>;

actionResultTask.Result returns a list including a list "Value" which is a list of Batch.Context.Models.Batch and I cannot access this value. It turns to null after casting it to a list.

This is the controller

[HttpGet]
[ProducesResponseType(404)]
[ProducesResponseType(200, Type = typeof(IEnumerable<Batch.Context.Models.Batch>))]
[Route("Batches")]
public async Task<IActionResult> Get()
{
    var myTask = Task.Run(() => utility.GetAllBatches());
    List<Context.Models.Batch> result = await myTask;

    return Ok(result);

}

How do I access the value as a list.

Answer 1

That is because the Result of the Task is an IActionResult derived class, OkObjectResult

Make the test async. Await the Method under test. Then perform the desired assertions.

For example

public async Task MyTest {

    //Arrange
    //...assume controller and dependencies defined.

    //Act
    IActionResult actionResult = await controller.Get();

    //Assert
    var okResult = actionResult as OkObjectResult;
    Assert.IsNotNull(okResult);

    var newBatch = okResult.Value as List<Batch.Context.Models.Batch>;
    Assert.IsNotNull(newBatch);

    //...other assertions.
}