JustMock supports .ReturnsAsync() when arranging standard mocks, however I am unable to find a way to get this same behavior when Automocking with a MockingContainer<T>.

A solution I've found is to wrap the return value in Task.FromResult<T>(). This fulfills the expected Task<T> return type of the async function, however the syntax is a bit clunky.

service
    .Arrange<IRepository>(r => r.SomeAsyncMethod("input"))
    .Returns(Task.FromResult<ISomeModel>(resultModel));

Ideally, I would like to avoid building the Task<T> return values manually and just rely on .ReturnsAsync() to handle the conversion.

service
    .Arrange<IRepository>(r => r.SomeAsyncMethod("input"))
    .ReturnsAsync(resultModel);

It's possible the APIs just aren't there, but I want to ensure I'm not just missing some special syntax to get it working.

I have a test case to test my EF repository getallasync call as follows:

We are adding UI unit tests for our Blazor project and diving into evaluating your JustMock and your testing framework. i am trying to create a test that invokes AddReleaseAsync method, but nothing that I have tried avoids a compile error, that I am showing below. We have a form that has a Blazor grid, initially populated with the data returned from GetReleasesAsync method, and then we add a new row using   AddReleaseAsync expecting to see an additional data row. A simple test that uses only GetReleasesAsync  method and checks that 2 data rows are returned works fine. But I can't compile the below test for adding a row. How do I mock an async method returning an anonymous type? We are using a pattern returning <string message, IEnumerable<T> data> quite extensively in our services to pass info/error Message and Data to the UI. Is it possible to mock the AddReleaseAsync and if so, how ? 

P.S. I understand that test is not quite 'complete', but I can't get past the compile error to properly write the test

Given this interface

    public interface IApiLogic
    {

        Task<IEnumerable<Release>> GetReleasesAsync();  // gets all data
        Task<(string Message, IEnumerable<Release>? Releases)> AddReleaseAsync(Release release);  
    }

And the below test method, 

      [TestMethod]
        public void CanAddnewRelease()
        {
            // Arrange
            var apiMock = Mock.Create<IApiLogic>();
            Mock.Arrange(() => apiMock.GetReleasesAsync()).ReturnsAsync(DummyReleases(2));
           

            var response =  new {  Message = "ok", Releases =  DummyReleases(3)};

            // 1. Tried this (and many other things, but always get a similar error)
            Mock.Arrange(() => apiMock.AddReleaseAsync(Arg.IsAny<Release>())).ReturnsAsync(response);

/* I get compile error for the above line

Error CS1503 Argument 2: cannot convert from '<anonymous type: string Message, System.Collections.Generic.IEnumerable<SDCSSPxte.Shared.Entities.Release> Releases>' to 'System.Func<(string Message, System.Collections.Generic.IEnumerable<SDCSSPxte.Shared.Entities.Release> Releases)>'

*/

            // 2. Tried this 

            Mock.Arrange(() => apiMock.AddReleaseAsync(Arg.IsAny<Release>())).Returns(Task.FromResult<(string Message, IEnumerable<Release>? Releases)>(response));

/* I get compile error on the above line

Error CS1503 Argument 1: cannot convert from '<anonymous type: string Message, System.Collections.Generic.IEnumerable<SDCSSPxte.Shared.Entities.Release> Releases>' to '(string Message, System.Collections.Generic.IEnumerable<SDCSSPxte.Shared.Entities.Release>? Releases)'

*/

            var ctx = new Bunit.TestContext();
            ctx.JSInterop.Mode = JSRuntimeMode.Loose;
            ctx.Services.AddSingleton<IApiLogic>(apiMock);
            ctx.Services.AddTelerikBlazor();

            var rootComponentMock = Mock.Create<TelerikRootComponent>();

            // Act
            var cut = ctx.RenderComponent<SDCSSPxte.Client.Pages.Admin.Release>(parameters => parameters.AddCascadingValue<TelerikRootComponent>(rootComponentMock));
            var addButton = cut.FindAll(".k-button-text")[0];
            addButton.Click();


            // Assert
            var dataRows = cut.FindAll("tbody tr");
            dataRows.Count.Should().Be(3);
            dataRows[0].ChildNodes.FirstOrDefault(n => n.TextContent.Trim() == "ReleaseComment for r1").Should().NotBeNull();
            dataRows[1].ChildNodes.FirstOrDefault(n => n.TextContent.Trim() == "ReleaseComment for r2").Should().NotBeNull();
            dataRows[2].ChildNodes.FirstOrDefault(n => n.TextContent.Trim() == "ReleaseComment for r3").Should().NotBeNull();     

  }

//  You should be able to infer what the Release class is, it is in a  separate project, SDCSSPxte.Shared.Entities. namespace)

Hi Team

We tried executing justMock test cases in command prompt using justMock Console (licensed), dotCover and xUnit, but justMock Test execution failed and gave the error "System.InvalidProgramException : Common Language Runtime detected an invalid program." 

The command we use to execute is as follows:

start /wait "" "{PATH}\JustMock\Libraries\Telerik.JustMock.Configuration.exe" /link "dotCover"

"{PATH}\JustMock\Libraries\Telerik.JustMock.Console.exe" runadvanced --profiler-path-64 "{PATH}\JustMock\Libraries\CodeWeaver\64\Telerik.CodeWeaver.Profiler.dll" --command "{PATH}\JetBrains.dotCover.CommandLineTools.2021.1.3\dotCover.exe" --command-args "cover --reporttype=html --output=CodeCoverage\\index.html --targetexecutable=\"{PATH}\xunit.runner.console.2.4.1\tools\net472\xunit.console.exe\" -- \"{PATH}\{PATH_OF_JUSTMOCK_TEST_DLL}\""

start /wait "" "{PATH}\JustMock\Libraries\Telerik.JustMock.Configuration.exe" /unlink "dotCover"

Attaching the log and test code.