21.2.1: get_FileVersionInfo does not have an implementation

[felsokning]

Describe the bug
When using dependabot to bump System.IO.Abstractions from 21.1.3 to 21.2.1, one test is now failing with:

  Error Message:
   Test method Felsökning.Tests.FileExtensionsTests.FileExtensions_ReadAllTextAsync_Succeeds threw exception: 
System.TypeLoadException: Method 'get_FileVersionInfo' in type 'System.IO.Abstractions.TestingHelpers.MockFileSystem' from assembly 'TestableIO.System.IO.Abstractions.TestingHelpers, Version=21.0.0.0, Culture=neutral, PublicKeyToken=96bf224d23c43e59' does not have an implementation.
  Stack Trace:
      at Felsökning.Tests.FileExtensionsTests.FileExtensions_ReadAllTextAsync_Succeeds()
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
   at Felsökning.Tests.FileExtensionsTests.FileExtensions_ReadAllTextAsync_Succeeds()
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

To Reproduce
Steps to reproduce the behaviour:

1. Create a Solution with two .NET9.0 projects, one for implementation and one for test.
2. Create a method that reads text from a file on 21.1.3 in the implementation project.
3. Create a test that will invoke and test the method from step 1 on 21.1.3 on the test project.
4. Use your preferred means of updating here to update the NuGet package in both projects to 21.2.1.
5. Run your test, again, note the failure.

Expected behaviour
The test should pass because get_FileVersionInfo has an implementation.

Actual behaviour
The exception thrown can't be handled and the test is marked as failed by VSTest, which fails the entire workflow/action.

Additional context
GitHub Actions demonstrating this:

https://github.com/felsokning/Fels-kning/actions/runs/12781024412/job/35628241504
https://github.com/felsokning/Fels-kning/actions/runs/12781024412/job/35628979085

It might be related to this PR: #1177

Source Code In Question

        public static async Task<T> ReadAllTextAsync<T>(this IFile file, string filePath)
        {
            var textResult = await file.ReadAllTextAsync(filePath);
            var jsonSerializerOptions = new JsonSerializerOptions
            {
                DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
            };

            return JsonSerializer.Deserialize<T>(textResult!, jsonSerializerOptions!)!;
        }

Test Code in Question

        [TestMethod]
        public async Task FileExtensions_ReadAllTextAsync_Succeeds()
        {
            var fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
            {
                { 
                    @"/dummyFilePath", 
                    new MockFileData("{\r\n  \"by\" : \"vinnyglennon\",\r\n  \"descendants\" : 36,\r\n  \"id\" : 32649091,\r\n  \"kids\" : [ 32650627, 32652889, 32651364, 32651377, 32655335, 32652375, 32652023, 32649456, 32651630, 32649718, 32653799, 32650386, 32657988, 32650124 ],\r\n  \"score\" : 162,\r\n  \"time\" : 1661859463,\r\n  \"title\" : \"Wikipedia Recent Changes Map\",\r\n  \"type\" : \"story\",\r\n  \"url\" : \"http://rcmap.hatnote.com/#en\"\r\n}") }
            });

            var result = await fileSystem.File.ReadAllTextAsync<SampleJson>("/dummyFilePath");

            result.Should().NotBeNull();
            result.Should().BeOfType<SampleJson>();
        }
    }

[vbreuss]

Thanks for reporting.
Are you sure that you updated the version also on the test project? It looks to me as if the interface version was updated to 21.2, but your test code still uses 21.1...

[felsokning]

Yes, it's also updated in the PR from dependabot: https://github.com/felsokning/Fels-kning/pull/28/files

[felsokning]

To elaborate what's going on:

dependabot creates a PR to update the dependencies per provider.
PR: felsokning/Fels-kning#28

When any PR is created in the repository, a github action workflow is fired-off to validate that building and testing passes.
Github Action Workflow: https://github.com/felsokning/Fels-kning/blob/main/.github/workflows/pull-request-build-and-test.yaml

There is a hard-requirement for that workflow to pass (called a check), where the PR will not/cannot be merged, without the workflow being successful.

[vbreuss]

I see your problem.
The reason behind it is, that System.IO.Abstractions.TestingHelpers is not updated as part of this PR.
You can either manually update the version on line 28 of Felsökning.Tests/Felsökning.Tests.csproj or update the dependabot.yml to include a group for System.IO.Abstractions, e.g.:

version: 2
updates: 
  # Enable version updates for nuget 
  - package-ecosystem: nuget
    # Look for NuGet dependency info from the `root` directory
    directory: . 
    # Check the nuget registry for updates every day (weekdays) 
    schedule: 
      interval: daily
    groups:
      system_io_abstractions:
        patterns:
          - "System.IO.Abstractions*"

[felsokning]

Closing against this PR. felsokning/Fels-kning#30

[felsokning]

Thanks for your help with that, @vbreuss!