Additional go.testFlags setting for single-test runs

[lukasschwab]

Is your feature request related to a problem? Please describe.

I'd like to provide a certain test flag — -v — when I run a single test in my project, but not when I run batches of tests (e.g. all the tests in a file, or all the tests in the project).

In particular, I want this for tests triggered by

• The inline run test link in the editor
• The "Test: Run Test at Cursor" command palette entry

Describe the solution you'd like
A clear and concise description of what you want to happen.

An additional setting — let's say go.singleTestFlags — with the same structure as the existing go.testFlags setting.

In run.ts, run and debug can switch on the details of the received TestRunRequest (cardinality of request.include). If only a single test is explicitly included, append the go.singleTestFlags to the go.testFlags.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

• Verbosity is actually the only flag I want to differ between single-test and multi-test runs. Maybe a dedicated single-test verbosity boolean setting, rather than a more complex set of flags, would be easier to implement/document.

Additional context
Add any other context or screenshots about the feature request here.

Given these example settings:

{
"go.testFlags": [
    "-tags",
    "manual"
  ],
  "go.singleTestFlags": [
    "-v"
  ]
}

• When I "Run Tests in Current File," they should run with go test -tags manual {selector}.
• When I "Run Test at Cursor," it should run with go test -tags manual -v {selector}.

[firelizzard18]

The ability to run tests without -v will eventually be removed. Long term all testing support will be migrated to use the vscode testing API/pane and that can't function without -v.