Fix parallel creating commit status bug with tests (#21911)

This PR is a follow up of #21469

Co-authored-by: Lauris BH <lauris@nix.lv>

tests/integration/repo_commits_test.go

@@ -4,9 +4,11 @@
 package integration
 
 import (
+	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"path"
+	"sync"
 	"testing"
 
 	"code.gitea.io/gitea/modules/json"
@@ -114,3 +116,32 @@ func TestRepoCommitsWithStatusFailure(t *testing.T) {
 func TestRepoCommitsWithStatusWarning(t *testing.T) {
 	doTestRepoCommitWithStatus(t, "warning", "gitea-exclamation", "yellow")
 }
+
+func TestRepoCommitsStatusParallel(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	session := loginUser(t, "user2")
+
+	// Request repository commits page
+	req := NewRequest(t, "GET", "/user2/repo1/commits/branch/master")
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	doc := NewHTMLParser(t, resp.Body)
+	// Get first commit URL
+	commitURL, exists := doc.doc.Find("#commits-table tbody tr td.sha a").Attr("href")
+	assert.True(t, exists)
+	assert.NotEmpty(t, commitURL)
+
+	var wg sync.WaitGroup
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go func(t *testing.T, i int) {
+			t.Run(fmt.Sprintf("ParallelCreateStatus_%d", i), func(t *testing.T) {
+				runBody := doAPICreateCommitStatus(NewAPITestContext(t, "user2", "repo1"), path.Base(commitURL), api.CommitStatusState("pending"))
+				runBody(t)
+				wg.Done()
+			})
+		}(t, i)
+	}
+	wg.Wait()
+}