Consolidate tests into a single style

[Andy-Wilkinson]

I can see at least four different ways of implementing testing for TensorFlowSharp,

• Unit tests in C# using xUnit (TensorFlowSharp.Tests.CSharp)
• Unit tests in C# using MSTest (TensorFlowSharp.Tests.CSharp/GettingStarted.cs)
• Unit tests in F# using xUnit (TensorFlowSharp.Tests)
• Tests running through a custom runner (SampleTest)

I think these should all be consolidated into a single format before things get too out of hand. Since most tests are currently in C#/xUnit, and the framework code is C#, then I would propose that this is the way to go.

PS: I'd be happy for this to be assigned to myself and I'll make a start on migrating them all.

[migueldeicaza]

We should move the GettingStarted.cs ones to xUnit, I did not realize this was different when I merge that code.

As for the F# ones, that one I would like to keep as is, as it serves as a place to explore and test the F# idioms.

And the sample test is my playground and a place to showcase how to use some things, so there is no point in changing that one.

[Andy-Wilkinson]

Yep - SampleTest should be left as is at the moment.

For 'GettingStarted.cs' I can submit a PR for this (I'm running Windows/VSCode/dotnet CLI, hence #305, but I can to patch the changes into the existing project structure).

Regarding the F# project solution, I can definitely see a place for testing F# idioms and usage. The existing F# tests don't seem to fall into this category though and are testing approaches that could easily be done in the main C# unit tests. My opinion would be that all framework testing should be in one place, with the F# solution reserved for F# idioms.