[BUG] Refresh Tests doesn't respect open solution filter

[captainsafia]

Describe the Issue

I'm observing that when I use the Refresh Tests feature (or anything in the test explorer) in a workspace with a solution filter open, the solution filter is ignored and the build is done on the root project.

Steps To Reproduce

1. git clone --recursive https://github.com/dotnet/aspnetcore.git
2. cd aspnetcore
3. ./restore.sh
4. cd src/Http
5. ./startvscode.sh
6. Open HttpAbstractions.slnf in VS Code.
7. Click "Refresh Tests".
8. Observe the build command targets the root solution.

dotnet build /Users/captainsafia/git/aspnetcore/val-filter-test/src/Http/../../AspNetCore.slnx /property:GenerateFullPaths=true /consoleloggerparameters:NoSummary /p:Configuration=Debug /p:Platform="Any CPU" 

Expected Behavior

I expect the "Refresh Test" option to respect the solution filter I have active in my workspace. For large solutions, running the root solution when I am in the context of a single project increases the amount of time spent building in my dev loop unnecessarily.

Environment Information

VSCode version: 1.100.2
C# Extension: 2.76.27
Using OmniSharp: false

[ocallesp]

Hi @Jxwoon, do you know who could help us dig into this ?

I noticed that after following the repro steps, even just right-click the solution AspNetCore(HttpAbstractions) and choosing Build triggers a build for AspNetCore.slnx instead of HttpAbstractions.slnf

This doesn't look like an issue in Test Explorer and it seems more related to the project system.

Is this expected behavior, or does it look like a bug ?

[ocallesp]

This was reported on macOS, but it also reproduces on Windows