Unit testing controller methods which return IActionResult

Question

I\'m in the process of building an ASP.NET Core WebAPI and I\'m attempting to write unit tests for the controllers. Most examples I\'ve found are from the older WebAPI/WebA

Answer 1

Assuming something like the

public IActionResult GetOrders() {
    var orders = repository.All();
    return Ok(orders);
}

the controller in this case is returning an OkObjectResult class.

Cast the result to the type of what you are returning in the method and perform your assert on that

[Fact]
public void GetOrders_WithOrdersInRepo_ReturnsOk() {
    // arrange
    var controller = new OrdersController(new MockRepository());

    // act
    var result = controller.GetOrders();
    var okResult = result as OkObjectResult;

    // assert
    Assert.IsNotNull(okResult);
    Assert.AreEqual(200, okResult.StatusCode);
}