From 032e8c7a9a357a13f41410063c2f7fb925dba5ac Mon Sep 17 00:00:00 2001
From: Earl Warren <contact@earl-warren.org>
Date: Tue, 27 Jun 2023 15:00:15 +0200
Subject: [PATCH] [TESTS] coverage for SignInOAuthCallback

(cherry picked from commit f8e1619b993943eafb8ee12bf06f4cdb5862de70)
(cherry picked from commit 46d8bc9bdf68b53767211dc103e6130f55bcdb64)
(cherry picked from commit e0c7b7055f5f4eeca84f1d0b1260b7b9622d3aab)
(cherry picked from commit faab747f8e7eb09262f755445462a77f8a6fb953)
(cherry picked from commit 46acb6a9a79e7ce588b2863aa37bf26805afb2b1)
(cherry picked from commit 22d964e74407c52ffcd3d3a84b0a66e2c186b0fa)
(cherry picked from commit 4c8a6031acf760c2383d9e103c703ee5ececb8e8)
---
 tests/integration/integration_test.go | 10 ++++++
 tests/integration/oauth_test.go       | 50 +++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/tests/integration/integration_test.go b/tests/integration/integration_test.go
index 1f03dc9857..49a714c343 100644
--- a/tests/integration/integration_test.go
+++ b/tests/integration/integration_test.go
@@ -39,6 +39,8 @@ import (
 	"code.gitea.io/gitea/tests"
 
 	"github.com/PuerkitoBio/goquery"
+	"github.com/markbates/goth"
+	"github.com/markbates/goth/gothic"
 	goth_gitlab "github.com/markbates/goth/providers/gitlab"
 	"github.com/stretchr/testify/assert"
 	"github.com/xeipuuv/gojsonschema"
@@ -232,6 +234,14 @@ func getUserToken(t testing.TB, userName string, scope ...auth.AccessTokenScope)
 	return getTokenForLoggedInUser(t, loginUser(t, userName), scope...)
 }
 
+func mockCompleteUserAuth(mock func(res http.ResponseWriter, req *http.Request) (goth.User, error)) func() {
+	old := gothic.CompleteUserAuth
+	gothic.CompleteUserAuth = mock
+	return func() {
+		gothic.CompleteUserAuth = old
+	}
+}
+
 func addAuthSource(t *testing.T, payload map[string]string) *auth.Source {
 	session := loginUser(t, "user1")
 	payload["_csrf"] = GetCSRF(t, session, "/admin/auths/new")
diff --git a/tests/integration/oauth_test.go b/tests/integration/oauth_test.go
index e9b69f5f14..4a00d73a02 100644
--- a/tests/integration/oauth_test.go
+++ b/tests/integration/oauth_test.go
@@ -5,15 +5,22 @@ package integration
 
 import (
 	"bytes"
+	"context"
+	"fmt"
 	"io"
 	"net/http"
 	"testing"
 
+	auth_model "code.gitea.io/gitea/models/auth"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/test"
 	"code.gitea.io/gitea/routers/web/auth"
 	"code.gitea.io/gitea/tests"
 
+	"github.com/markbates/goth"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -419,3 +426,46 @@ func TestRefreshTokenInvalidation(t *testing.T) {
 	assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
 	assert.Equal(t, "token was already used", parsedError.ErrorDescription)
 }
+
+func TestSignInOAuthCallbackSignIn(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	//
+	// OAuth2 authentication source GitLab
+	//
+	gitlabName := "gitlab"
+	gitlab := addAuthSource(t, authSourcePayloadGitLabCustom(gitlabName))
+
+	//
+	// Create a user as if it had been previously been created by the GitLab
+	// authentication source.
+	//
+	userGitLabUserID := "5678"
+	userGitLab := &user_model.User{
+		Name:        "gitlabuser",
+		Email:       "gitlabuser@example.com",
+		Passwd:      "gitlabuserpassword",
+		Type:        user_model.UserTypeIndividual,
+		LoginType:   auth_model.OAuth2,
+		LoginSource: gitlab.ID,
+		LoginName:   userGitLabUserID,
+	}
+	defer createUser(context.Background(), t, userGitLab)()
+
+	//
+	// A request for user information sent to Goth will return a
+	// goth.User exactly matching the user created above.
+	//
+	defer mockCompleteUserAuth(func(res http.ResponseWriter, req *http.Request) (goth.User, error) {
+		return goth.User{
+			Provider: gitlabName,
+			UserID:   userGitLabUserID,
+			Email:    userGitLab.Email,
+		}, nil
+	})()
+	req := NewRequest(t, "GET", fmt.Sprintf("/user/oauth2/%s/callback?code=XYZ&state=XYZ", gitlabName))
+	resp := MakeRequest(t, req, http.StatusSeeOther)
+	assert.Equal(t, test.RedirectURL(resp), "/")
+	userAfterLogin := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: userGitLab.ID})
+	assert.Greater(t, userAfterLogin.LastLoginUnix, userGitLab.LastLoginUnix)
+}