Make test independent of OS

The github CLI runs on linux which was the reason why the pipeline
failed. The file was not served because the target URL was not correct
for a linux system.

Author: rockstaedt

cmd/update_test.go

@@ -2,12 +2,14 @@ package cmd
 
 import (
 	"bytes"
+	"fmt"
 	"github.com/stretchr/testify/assert"
 	"log"
 	"net/http"
 	"net/http/httptest"
 	"os"
 	"rockstaedt/commit-message-check/internal/model"
+	"runtime"
 	"testing"
 )
 
@@ -121,7 +123,8 @@ func TestDownloadScript(t *testing.T) {
 		err := os.WriteFile(tempDir+"/dummy", []byte("i am a go binary"), os.ModePerm)
 		assert.Nil(t, err)
 		ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			if r.URL.String() == "/commit-message-check-v1.1.1-darwin-amd64" {
+			targetUrl := fmt.Sprintf("/commit-message-check-v1.1.1-%s-%s", runtime.GOOS, runtime.GOARCH)
+			if r.URL.String() == targetUrl {
 				http.ServeFile(w, r, tempDir+"/dummy")
 			}
 		}))