Improve API tests #815

	name: Test

	on:
	push:
	branches:
	- main
	pull_request:
	release:
	types:
	- published
	- created
	- edited

	defaults:
	run:
	shell: bash

	jobs:
	test:
	strategy:
	matrix:
	os:
	- ubuntu-22.04 # https://github.com/actions/runner-images/blob/main/images/linux/Ubuntu2204-Readme.md
	- macos-13 # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
	- windows-2022 # https://github.com/actions/runner-images/blob/main/images/win/Windows2022-Readme.md
	go-version:
	- 1.18.x
	- 1.19.x
	- 1.20.x
	neovim-version:
	- v0.9.1
	- nightly
	fail-fast: false

	runs-on: ${{ matrix.os }}

	steps:
	- name: Set flag environment variable
	run: \|
	echo "OS=$(echo ${{ runner.os }} \| tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
	echo "GO_VERSION=$(echo ${{ matrix.go-version }} \| cut -d. -f-2)" >> $GITHUB_ENV
	echo "NVIM_VERSION=$(if [ ${{ matrix.neovim-version }} != 'nightly' ]; then echo 'stable'; else echo 'nightly'; fi)" >> $GITHUB_ENV

	- name: Install Go
	uses: actions/setup-go@v3
	with:
	go-version: ${{ matrix.go-version }}

	- name: Checkout code
	uses: actions/checkout@v3

	- name: Install neovim binary
	uses: rhysd/action-setup-vim@v1
	with:
	neovim: true
	version: ${{ matrix.neovim-version }}

	- name: go vet
	run: \|
	go vet ./...

	- name: Test and take a coverage
	run: \|
	go test -v -race -count=1 -covermode=atomic -coverpkg=./... -coverprofile=coverage.out ./...

	- uses: codecov/codecov-action@v3
	with:
	file: coverage.out
	flags: ${{ env.OS }}-${{ env.GO_VERSION }}-${{ env.NVIM_VERSION }}
	env_vars: OS,GO_VERSION,NVIM_VERSION

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