Always store primary email address into email_address table and also the state (#15956)

* Always store primary email address into email_address table and also the state

* Add lower_email to not convert email to lower as what's added

* Fix fixture

* Fix tests

* Use BeforeInsert to save lower email

* Fix v180 migration

* fix tests

* Fix test

* Remove wrong submited codes

* Fix test

* Fix test

* Fix test

* Add test for v181 migration

* remove change user's email to lower

* Revert change on user's email column

* Fix lower email

* Fix test

* Fix test

models/migrations/v181_test.go

@@ -0,0 +1,54 @@
+// Copyright 2021 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 migrations
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_addPrimaryEmail2EmailAddress(t *testing.T) {
+	type User struct {
+		ID       int64
+		Email    string
+		IsActive bool
+	}
+
+	// Prepare and load the testing database
+	x, deferable := prepareTestEnv(t, 0, new(User))
+	if x == nil || t.Failed() {
+		defer deferable()
+		return
+	}
+	defer deferable()
+
+	err := addPrimaryEmail2EmailAddress(x)
+	assert.NoError(t, err)
+
+	type EmailAddress struct {
+		ID          int64  `xorm:"pk autoincr"`
+		UID         int64  `xorm:"INDEX NOT NULL"`
+		Email       string `xorm:"UNIQUE NOT NULL"`
+		LowerEmail  string `xorm:"UNIQUE NOT NULL"`
+		IsActivated bool
+		IsPrimary   bool `xorm:"DEFAULT(false) NOT NULL"`
+	}
+
+	var users = make([]User, 0, 20)
+	err = x.Find(&users)
+	assert.NoError(t, err)
+
+	for _, user := range users {
+		var emailAddress EmailAddress
+		has, err := x.Where("lower_email=?", strings.ToLower(user.Email)).Get(&emailAddress)
+		assert.NoError(t, err)
+		assert.True(t, has)
+		assert.True(t, emailAddress.IsPrimary)
+		assert.EqualValues(t, user.IsActive, emailAddress.IsActivated)
+		assert.EqualValues(t, user.ID, emailAddress.UID)
+	}
+}