.Net Core TestClient cannot post with parameters - integration

Question

I am creating Web API integration test with MSTest Test Server. I can request data. However when I post with data, request routed to Test Server without parameters. Below is my codes, where I am wrong?
/// <summary>
///
/// </summary>
/// <returns></returns>
protected async Task TestDataInitializeAsync()
{
_factory = new WebApplicationFactory<MyWebApi.Startup>();
_client = _factory.CreateClient();
_client.DefaultRequestHeaders.Clear();
_client.DefaultRequestHeaders.Accept.Clear();
_client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));
_client.DefaultRequestHeaders.Add("User-Agent", ".NET Foundation Repository Reporter");
var content = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("username", "userABC"),
new KeyValuePair<string, string>("password","password123")
});
var response = await _client.PostAsync("/account/login", content);
}
Here is my Controller method:
/// <summary>
/// Account controller ASP.NET identity authentication
/// </summary>
[Produces("application/json")]
[Route("[controller]")]
[ApiController]
[Authorize]
public class AccountController : ControllerBase
{
[HttpPost]
[AllowAnonymous]
[Route("login")]
public async Task<object> Login(string userName, string password)
{
try
{
var result = await _signInManager.PasswordSignInAsync(userName, password, false, false);
if (result.Succeeded)
{
var appUser = _userManager.Users.SingleOrDefault(r => r.UserName == userName);
return GenerateJwtToken(userName, appUser);
}
else
{
return BadRequest(new { message = "No user found! Please check user name and password." });
}
}
catch (Exception ex)
{
return StatusCode(Microsoft.AspNetCore.Http.StatusCodes.Status500InternalServerError, ex.Message);
}
}
}
}
Parameters, username and password always null.

Answer 1

You should edit your controller's action to get post parameters from your request's body using FromBody :
[HttpPost]
[AllowAnonymous]
[Route("login")]
public async Task<object> Login([FromBody]LoginVm model)
{
...
}
With the LoginVm class containing Username and Password as string properties.
Hope it helps.

Answer 2

I know the reason after read ASP.NET Core 2.2 Microsoft Document carefully. The key point is [ApiController] attribute. It does not related with TestClient.
In .NET Core 2.2, if you put [ApiController] attribute in Class level or Assembly level, .NET Core framework will do parameter binding automatically. We no need to define as [FromBody] in front of the object parameters for complex type. However, for simple type such as int, string, bool, we need to put [FromBody], [FromForm], [FromQuery], [FromHeader], [FromRoute], [FromServices], accordingly.
In my case, I just put [FromFrom] attributes in front of two simple type parameters as below and problem was solved.
<summary>
/// To log-in to the system by using userName and password.
/// If authentication is successed, bearer token will response from server.
/// </summary>
/// <param name="userName"></param>
/// <param name="password"></param>
/// <returns>Bearer Token</returns>
/// <remarks>
/// </remarks>
[HttpPost]
[AllowAnonymous]
[Route("login")]
public async Task<object> Login([FromForm] string userName, [FromForm] string password)
{
try
{
var result = await _signInManager.PasswordSignInAsync(userName, password, false, false);
if (result.Succeeded)
{
var appUser = _userManager.Users.SingleOrDefault(r => r.UserName == userName);
return GenerateJwtToken(userName, appUser);
}
else
{
return BadRequest(new { message = "No user found! Please check user name and password." });
}
}
catch (Exception ex)
{
return StatusCode(Microsoft.AspNetCore.Http.StatusCodes.Status500InternalServerError, ex.Message);
}
}