❔ Unit test: The source 'IQueryable' doesn't implement 'IAsyncEnumerable<T>'

My test keep failing when it trying to get to this line of code

var foods = await _foodRepository.FindAll().ToListAsync(cancellationToken);

Detail

FindAll

IQueryable<T> FindAll(Expression<Func<T, bool>>? predicate = null);

Controller

    public async Task<IActionResult> GetAll(CancellationToken cancellationToken = default)
    {
        var foods = await _foodRepository.FindAll().ToListAsync(cancellationToken);
        return Ok(_mapper.Map<IEnumerable<FoodDTO>>(foods));
    }

Test

 public async Task FoodController_GetAll_ReturnOk()
    {
        #region[Arrange]
        var foods = A.Fake<IEnumerable<Food>>();
        var foodsDTO = A.Fake<IEnumerable<FoodDTO>>();
        A.CallTo(() => _mapper.Map<IEnumerable<FoodDTO>>(foods)).Returns(foodsDTO);
        var controller = new FoodController(_mapper, _foodRepository, _userFoodRepository);
        #endregion

        #region[Act]
        var result = await controller.GetAll();
        #endregion

        #region[Assert]
        result.Should().NotBeNull();
        result.Should().BeOfType(typeof(OkObjectResult));
        #endregion
    }

Iqueryable is ienumerable, not the async version

I still don't understand these type can you provide me a fix for this situation ?

Don't use ToListAsync

ToList() should work

Although ToList generally not a good idea to trigger on db queries

I don't have permission to change the controller implementation right now do we have any alternative to make the unittest fit for this controller ?

Maybe you just need to add
using System. Data.Entity

what the repository implementation

probably it fails due to the query?

the mock is not implement the right interface

what is where if?

there showing you to send the predicate and would do it where isn't null

but you didnt send a predicate then it is null?

so rather change the implementation for the FindAll repository's Method

@TotechsStrypper use this https://github.com/romantitov/MockQueryable

???

Good lord y'all lol

You have to mock async stuff a little diff

So it cannot face the IQueryable
a guy help me create a custom interface
var foods = A.Fake<IEFMock>();

public interface IEFMock : IQueryable<Food>, IAsyncEnumerable<Food>
{
}

This will crash at runtime

You have to mock all of IAsyncEnumerable

Which the nuget i linked above does

I've done this many times, it's an easy fix

Do you know how to do that with my current test ?
I am a complete noob in FakeItEasy

Read the readme of the repo i just sent lol

wait

No lol, the library already handles all that for you

Just read the docs and install the fake it easy version of the lib

oh

There ya go

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