Move user follow and openid into models/user/ (#17613)

* Move UserRedirect into models/user/

* Fix lint & test

* Fix lint

* Fix lint

* remove nolint comment

* Fix lint

* Move user follow and openid into models/user

* Ignore the lint

* Ignore the lint

* Fix test

* ignore stutters lint on UserOpenID

models/user/follow_test.go

@@ -0,0 +1,22 @@
+// Copyright 2020 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 user
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsFollowing(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+	assert.True(t, IsFollowing(4, 2))
+	assert.False(t, IsFollowing(2, 4))
+	assert.False(t, IsFollowing(5, unittest.NonexistentID))
+	assert.False(t, IsFollowing(unittest.NonexistentID, 5))
+	assert.False(t, IsFollowing(unittest.NonexistentID, unittest.NonexistentID))
+}