fix(actions): call automerge service on successful commit state

- Backport of https://github.com/go-gitea/gitea/pull/30225

(cherry picked from commit 36f4732e6a)

tests/integration/actions_commit_status_test.go

@@ -0,0 +1,48 @@
+// Copyright 20124 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"net/url"
+	"testing"
+
+	actions_model "code.gitea.io/gitea/models/actions"
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/services/actions"
+	"code.gitea.io/gitea/services/automerge"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestActionsAutomerge(t *testing.T) {
+	onGiteaRun(t, func(t *testing.T, u *url.URL) {
+		assert.True(t, setting.Actions.Enabled, "Actions should be enabled")
+
+		ctx := db.DefaultContext
+
+		user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
+		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
+		job := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRunJob{ID: 292})
+
+		assert.False(t, pr.HasMerged, "PR should not be merged")
+		assert.Equal(t, issues_model.PullRequestStatusMergeable, pr.Status, "PR should be mergable")
+
+		scheduled, err := automerge.ScheduleAutoMerge(ctx, user, pr, repo_model.MergeStyleMerge, "Dummy")
+
+		assert.NoError(t, err, "PR should be scheduled for automerge")
+		assert.True(t, scheduled, "PR should be scheduled for automerge")
+
+		actions.CreateCommitStatus(ctx, job)
+
+		pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
+
+		assert.True(t, pr.HasMerged, "PR should be merged")
+	},
+	)
+}