[TESTS] oauth2: add integration test helpers

(cherry picked from commit e11dcc60f291f1b882a993f60f8381fe4561d6d0)

use backticks to avoid backslash

(cherry picked from commit 34212791eef2031ef09ea118a2ee5b98082174dc)
(cherry picked from commit bde9473c69eaf6306457b4218d9704af64cb6cc8)
(cherry picked from commit d4deb43084eec4ce0de786a01acef52921a39b13)
(cherry picked from commit 08e91649b0057258ea5d775447d84093c31ad523)
(cherry picked from commit 2b988e5415b35e608726facb5d23a920334fda1c)

[TESTS] auth LinkAccount test coverage (squash)

(cherry picked from commit a2b2e3066bee46ca15ce66d0deb7ef3e89915248)
(cherry picked from commit 841d1b50731a94b9330b6a623a40f8aa0a6befa8)
(cherry picked from commit 35da630ad884a9ffff5bd873123687af169a6cac)
(cherry picked from commit caf2dc4fa7c6fb45a19edc5a025579d42d8db455)
(cherry picked from commit 6eb81e67ba69aeb9f1290f6717ec6c6a367752c3)
(cherry picked from commit d59757239f4fd6353dafd88f2460145b88ef38a1)
(cherry picked from commit 38a121b6880538f381799fb69666e13abf667502)
(cherry picked from commit 20613874ee04286a5ecb28045ec80af0fd850582)
(cherry picked from commit 6d2705e10858baf5e33df0ced047c544ed826fd3)
(cherry picked from commit f177b728142911fed6709339dd0e686017b610b0)
(cherry picked from commit 75e1fc4c8318b378f94065a268b079ac152657ef)
(cherry picked from commit ba64fa9867b06fb0b390a799ef4c3f39f554bb0b)
(cherry picked from commit 0b8ab0893ec6b6d689534b5e4ac50cdfe36c34e9)
(cherry picked from commit 1419d11435b0cdf7c41cb7175dffaf521ecfacd7)
(cherry picked from commit 38766847e0441f4b3841b05b34e3442f4e23af06)
(cherry picked from commit 6f23426a6ab09df7bb5817d364301975715dc10b)
(cherry picked from commit 9e0ff9ca54505723ad39a3fb221b94cbcef2da66)
(cherry picked from commit 353f3601c318f77a07fba0976fc9e3d28b2fc818)

models/auth/source.go

@@ -300,6 +300,17 @@ func GetSourceByID(ctx context.Context, id int64) (*Source, error) {
 	return source, nil
 }
 
+func GetSourceByName(ctx context.Context, name string) (*Source, error) {
+	source := &Source{}
+	has, err := db.GetEngine(ctx).Where("name = ?", name).Get(source)
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrSourceNotExist{}
+	}
+	return source, nil
+}
+
 // UpdateSource updates a Source record in DB.
 func UpdateSource(ctx context.Context, source *Source) error {
 	var originalSource *Source

tests/integration/integration_test.go

@@ -39,6 +39,7 @@ import (
 	"code.gitea.io/gitea/tests"
 
 	"github.com/PuerkitoBio/goquery"
+	goth_gitlab "github.com/markbates/goth/providers/gitlab"
 	"github.com/stretchr/testify/assert"
 	"github.com/xeipuuv/gojsonschema"
 )
@@ -231,6 +232,39 @@ func getUserToken(t testing.TB, userName string, scope ...auth.AccessTokenScope)
 	return getTokenForLoggedInUser(t, loginUser(t, userName), scope...)
 }
 
+func addAuthSource(t *testing.T, payload map[string]string) *auth.Source {
+	session := loginUser(t, "user1")
+	payload["_csrf"] = GetCSRF(t, session, "/admin/auths/new")
+	req := NewRequestWithValues(t, "POST", "/admin/auths/new", payload)
+	session.MakeRequest(t, req, http.StatusSeeOther)
+	source, err := auth.GetSourceByName(context.Background(), payload["name"])
+	assert.NoError(t, err)
+	return source
+}
+
+func authSourcePayloadOAuth2(name string) map[string]string {
+	return map[string]string{
+		"type":      fmt.Sprintf("%d", auth.OAuth2),
+		"name":      name,
+		"is_active": "on",
+	}
+}
+
+func authSourcePayloadGitLab(name string) map[string]string {
+	payload := authSourcePayloadOAuth2(name)
+	payload["oauth2_provider"] = "gitlab"
+	return payload
+}
+
+func authSourcePayloadGitLabCustom(name string) map[string]string {
+	payload := authSourcePayloadGitLab(name)
+	payload["oauth2_use_custom_url"] = "on"
+	payload["oauth2_auth_url"] = goth_gitlab.AuthURL
+	payload["oauth2_token_url"] = goth_gitlab.TokenURL
+	payload["oauth2_profile_url"] = goth_gitlab.ProfileURL
+	return payload
+}
+
 func createUser(ctx context.Context, t testing.TB, user *user_model.User) func() {
 	user.MustChangePassword = false
 	user.LowerName = strings.ToLower(user.Name)