coverlet VS Moq

You might have noticed when you were looking in NuGet, there was a package called coverlet installed into the project:

There are a lot libraries to collect code coverage, one of this one is Coverlet: https://github.com/coverlet-coverage/coverlet

We use Coverlet. You have to do some work to get it working with your tests but I have no complaints. I don't know for sure if it works with VS Community, but since it plugs into MSBuild I'm not sure how it could be gated to that.

And I would like to build a total test coverage for the solution. So, I added coverlet.msbuild to the dependencies and executed the next command from the examples of coverlet

CoverletOutputFormat: The format of the report that coverlet will generate (opencover, cobertura, json). More here;

Utilize Coverletand Report Generator utilities – however, this is where its funny, because these are .NET CLI tools that need the .NET 6 SDK installed.

Coverlet works really well.

However, I am hesitant to do so. Whenever it seems I have to fight the tools that are provided for me this is a likely sign that I’m Doing Things Wrong because of some fundamental misunderstandings and misassumptions on my part. I did some digging and found that VSTest by design forces the placement of data collectors’ output into GUIDed subdirectories, see Coverlet documentation, Coverlet issue #500 and VSTest issue #2378. That this is forced by design reinforces my worries that I’m doing something counterproductive.

Coverlet

In terms of mocking there are several frameworks you can use, but I've mainly relied on Moq and NSubstitute. Within this demo, I'm going to use NSubstitute as I've found it a little easier to use.

Or you just run into bullshit like https://github.com/Moq/moq4/issues/173

Now to the real benefit of DI: If you are testing a method in your application that calls the ReservationRepository.GetReservation() method, you can use a library like Moq to simply "mock" a class that uses the IReservationRepository interface and define the return result of the GetReservation() method. Pass the mocked class into the constructor of the class you are testing.

MOQ https://github.com/moq/moq4

Moq

Both projects use similar testing infrastructure. I write unit tests in C# using XUnit.net. I frequently use mock objects in testing, and MOQ is my tool of choice. I utilize continuous testing and coverage analysis through Rider. I do not have specific objectives for code coverage. When writing complicated algorithms, I frequently shoot for 100% coverage of the algorithm. I test simple properties inconsistently, and frequently do not test guard clauses.

🔗 Moq documentation | GitHub

But the reality is that I don't really write my tests with it. Toss on the MSTest attributes as needed of course. But all the testing code itself is FluentAssertions with a bit of Moq. (Though I find rarely need to use Moq/mocking anymore -- scandalous, I know.)

Moq tutorial