wishlist: add support for a :GoDebugTestFunc command

[alexishevia]

What did you do? (required: The issue will be closed when not provided)

Ran the :GoTestFunc command to run tests for the function under the cursor.

Since the tests failed, I wanted to debug the function to see where the issue was happening.

What did you expect to happen?

I expected there to be a :GoDebugTestFunc command, so I could start a debug session that ran the specific test under the cursor.

What happened instead?

Had to figure out the correct -test.run parameter to pass to :GoDebugTest.

I was eventually able to find it, but would have been a lot easier if a :GoDebugTestFunc (or similar) existed.

Configuration (MUST fill this out):

vim-go version: 33bf268

vimrc you used to reproduce: n/a

Vim version (first three lines from :version):

VIM - Vi IMproved 8.1 (2018 May 18, compiled Apr 15 2020 06:40:31)
Included patches: 1-2269
Modified by [email protected]

Go version (go version):

go1.12.3 linux/amd64

Go environment

go env Output:

GOARCH="amd64"
GOBIN="/home/alexishevia/go/bin"
GOCACHE="/home/alexishevia/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/alexishevia/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build378507522=/tmp/go-build -gno-record-gcc-switches"

gopls version

gopls version Output:

golang.org/x/tools/gopls 0.4.0
    golang.org/x/tools/[email protected] h1:G4+YP9kaV4dJb79J5MobyApxX493Qa6VoiTceUmxqik=

[bhcleek]

:GoDebugTest would have worked for you, too, if you put a breakpoint in the test that you want to debug.

[bhcleek]

The vim-go help is useful here, too. :help :GoDebugTest explicitly mentioned the test flags and explicitly calls out -test.run.

[alexishevia]

hey @bhcleek , thanks for the answers.

What I'm trying to say is:
Even though the :GoTestFunc functionality can be achieved by running :GoTest with -run, there is value to having :GoTestFunc (it makes it easier/faster to run a specific test).

The same can be said of a :GoDebugTestFunc. Even though you could achieve the same with :GoDebugTest and -test.run, having a :GoDebugTestFunc would still have value because it makes it easier and faster to debug a specific test.