[MODERATION] Purge issues on user deletion (squash)

(cherry picked from commit 4f529d9596)
(cherry picked from commit f0e3acadd3)
(cherry picked from commit 682c4effe6)
(cherry picked from commit e43c2d84fd)
(cherry picked from commit 9c8e53ccc7)

tests/integration/admin_user_test.go

@@ -4,10 +4,12 @@
 package integration
 
 import (
+	"fmt"
 	"net/http"
 	"strconv"
 	"testing"
 
+	issues_model "code.gitea.io/gitea/models/issues"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/tests"
@@ -68,17 +70,22 @@ func makeRequest(t *testing.T, formData user_model.User, headerCode int) {
 }
 
 func TestAdminDeleteUser(t *testing.T) {
+	defer tests.AddFixtures("tests/integration/fixtures/TestAdminDeleteUser/")()
 	defer tests.PrepareTestEnv(t)()
 
 	session := loginUser(t, "user1")
 
-	csrf := GetCSRF(t, session, "/admin/users/8/edit")
-	req := NewRequestWithValues(t, "POST", "/admin/users/8/delete", map[string]string{
+	userID := int64(1000)
+
+	unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{PosterID: userID})
+
+	csrf := GetCSRF(t, session, fmt.Sprintf("/admin/users/%d/edit", userID))
+	req := NewRequestWithValues(t, "POST", fmt.Sprintf("/admin/users/%d/delete", userID), map[string]string{
 		"_csrf": csrf,
 		"purge": "true",
 	})
 	session.MakeRequest(t, req, http.StatusSeeOther)
 
-	assertUserDeleted(t, 8, true)
+	assertUserDeleted(t, userID, true)
 	unittest.CheckConsistencyFor(t, &user_model.User{})
 }