Move login related structs and functions to models/login (#17093)

* Move login related structs and functions to models/login

* Fix test

* Fix lint

* Fix lint

* Fix lint of windows

* Fix lint

* Fix test

* Fix test

* Only load necessary fixtures when preparing unit tests envs

* Fix lint

* Fix test

* Fix test

* Fix error log

* Fix error log

* Fix error log

* remove unnecessary change

* fix error log

* merge main branch

models/login/source_test.go

@@ -0,0 +1,59 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package login
+
+import (
+	"strings"
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/json"
+
+	"github.com/stretchr/testify/assert"
+	"xorm.io/xorm/schemas"
+)
+
+type TestSource struct {
+	Provider                      string
+	ClientID                      string
+	ClientSecret                  string
+	OpenIDConnectAutoDiscoveryURL string
+	IconURL                       string
+}
+
+// FromDB fills up a LDAPConfig from serialized format.
+func (source *TestSource) FromDB(bs []byte) error {
+	return json.Unmarshal(bs, &source)
+}
+
+// ToDB exports a LDAPConfig to a serialized format.
+func (source *TestSource) ToDB() ([]byte, error) {
+	return json.Marshal(source)
+}
+
+func TestDumpLoginSource(t *testing.T) {
+	assert.NoError(t, db.PrepareTestDatabase())
+
+	loginSourceSchema, err := db.TableInfo(new(Source))
+	assert.NoError(t, err)
+
+	RegisterTypeConfig(OAuth2, new(TestSource))
+
+	CreateSource(&Source{
+		Type:     OAuth2,
+		Name:     "TestSource",
+		IsActive: false,
+		Cfg: &TestSource{
+			Provider: "ConvertibleSourceName",
+			ClientID: "42",
+		},
+	})
+
+	sb := new(strings.Builder)
+
+	db.DumpTables([]*schemas.Table{loginSourceSchema}, sb)
+
+	assert.Contains(t, sb.String(), `"Provider":"ConvertibleSourceName"`)
+}