Move issues related files into models/issues (#19931)

* Move access and repo permission to models/perm/access

* fix test

* fix git test

* Move functions sequence

* Some improvements per @KN4CK3R and @delvh

* Move issues related code to models/issues

* Move some issues related sub package

* Merge

* Fix test

* Fix test

* Fix test

* Fix test

* Rename some files

models/issues/main_test.go

@@ -2,14 +2,20 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
-package issues
+package issues_test
 
 import (
 	"path/filepath"
 	"testing"
 
+	_ "code.gitea.io/gitea/models"
+	issues_model "code.gitea.io/gitea/models/issues"
+	_ "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
+	_ "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func init() {
@@ -17,14 +23,18 @@ func init() {
 	setting.LoadForTest()
 }
 
+func TestFixturesAreConsistent(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+	unittest.CheckConsistencyFor(t,
+		&issues_model.Issue{},
+		&issues_model.PullRequest{},
+		&issues_model.Milestone{},
+		&issues_model.Label{},
+	)
+}
+
 func TestMain(m *testing.M) {
 	unittest.MainTest(m, &unittest.TestOptions{
 		GiteaRootPath: filepath.Join("..", ".."),
-		FixtureFiles: []string{
-			"reaction.yml",
-			"user.yml",
-			"repository.yml",
-			"milestone.yml",
-		},
 	})
 }