chore: add test action

.github/workflows/test.yaml

@@ -0,0 +1,31 @@
+on: [push, pull_request]
+name: test
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version: [1.19.x, 1.20.x]
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Run lints
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: latest
+        if: "matrix.platform == 'ubuntu-latest'" # gofmt linter fails on Windows for CRLF problems
+      - name: Run tests
+        run: go test -v ./... -covermode=count -coverprofile=coverage.out -coverpkg=./...
+      - name: Send coverage
+        if: "matrix.platform == 'ubuntu-latest'"
+        env:
+          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          GO111MODULE=off go get github.com/mattn/goveralls
+          $(go env GOPATH)/bin/goveralls -coverprofile=coverage.out -service=github

README.md

@@ -1,3 +1,7 @@
+[![https://pkg.go.dev/github.com/bowman2001/goldmark-supersubscript](https://pkg.go.dev/badge/github.com/bowman2001/goldmark-supersubscript.svg)](https://pkg.go.dev/github.com/bowman2001/goldmark-supersubscript)
+[![https://coveralls.io/github/bowman2001/goldmark-supersubscript](https://coveralls.io/repos/github/bowman2001/goldmark-supersubscript/badge.svg?branch=master)](https://coveralls.io/github/bowman2001/goldmark-supersubscript)
+[![https://goreportcard.com/report/github.com/bowman2001/goldmark-supersubscript](https://goreportcard.com/badge/github.com/bowman2001/goldmark-supersubscript)](https://goreportcard.com/report/github.com/bowman2001/goldmark-supersubscript)
+
 # goldmark-SuperSubscript
 
 This Go module contains two extensions for the Markdown parser [Goldmark](https://github.com/yuin/goldmark) providing super- and subscripts.
@@ -12,4 +16,4 @@ Similar to [markdown-it](https://github.com/markdown-it/markdown-it) the new mar
 
 We need to place one before and one after the text segment like `H~2~O` or `x^2^`. 
 
-**No whitespace** between the two surrounding markup characters is allowed. In case we want to insert space we need to place a non-breaking whitespace—either directly or as HTML entity ` `. 
+**No whitespace** between the two surrounding markup characters is allowed. In case we want to insert space we need to place a non-breaking space—either directly or as HTML entity ` `.