[WIP] Enable VS unit tests in CI

[dsyme]

This enables the VisualFSharp.Unittests suite in CI. All tests except ignored and "Expensive" (approx > 15sec) are run.

[dsyme]

Please don't merge this yet.

It's very strange - all tests are passing on my local machine, but we have 500 failures in AppVeyor. https://ci.appveyor.com/project/KevinRansom/visualfsharp-radou/build/0.0.1.1530/job/dyvijxk5sri13vm3/tests in the VisualFSharp.Unittests IDE suite.

However equally we have 2000 passing tests in that suite, so it's not a totally catastrophic error. Strangely I can't see any specific diagnostics in the failing tests that indicate the problem: every test is just of the "failed to find the right intellisense completion" sort of error. Help appreciated.

I've turned on as much logging as possible and made the build.cmd ignore the overall failure so we can collect logs via artifacts as well, e.g. https://ci.appveyor.com/project/KevinRansom/visualfsharp-radou/build/0.0.1.1530/job/dyvijxk5sri13vm3/artifacts.

However I'm going to have to keep throwing slight variations at AppVeyor to try to work out what's going wrong.

[dsyme]

@enricosada pointed out that we can remote-desktop to the AppVeyor machine https://www.appveyor.com/docs/how-to/rdp-to-build-worker

I will do that.

on_finish:
- ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))

[dsyme]

OK, the failing tests were due to LF (not CRLF) being used on AppVeyor checkout for the test files under vsintegration...

I've added a vsintegration.gitattributes to force CRLF under vsintegration (these are Windows-only files after all), hopefully that will do the trick

[dsyme]

Ugh, so AppVeyor decides to use LF by default. How silly, I have no idea why it is doing that for a Windows-based CI system.

This fixes that. What a waste of time!

init:
  - git config --global core.autocrlf true

Hopefully this will now go through

[dsyme]

I'll merge this, we're green on AppVeyor at last! That means AppVeyor is now running all unit test suties (apart from "Expensive"). The Jenkins debug build timed out

[enricosada]

🎉 🎉 🎉 🎉

[enricosada]

Ugh, so AppVeyor decides to use LF by default. How silly, I have no idea why it is doing that for a Windows-based CI system

@dsyme that's should not be a problem with a .gitattributes file, it's strange (or file are committed before .gitattributes and used a different line ending in git). I'll check

[ctaggart]

Why do the tests fail due to LF? Why not fix the tests instead of changing core.autocrlf? Which types of files must be CRLF? Not .fs files. Perhaps .sln files. Better to update .gitattributes.