[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)
(cherry picked from commit 6e4ae401d815bf32ca21e2fdada5aa1ac528c756)
(cherry picked from commit 1a7afe41530378cf194ce7c302cfe6bf757a2838)
(cherry picked from commit f9f3e0cc02fda87ef769ee8410e9d926963d2d97)
(cherry picked from commit 22fd0337f3cc57e4365c783b80db553627022f6d)
(cherry picked from commit ee57e138d1a89508f7613d1e6782a9909977b153)
(cherry picked from commit 21f9b7e73ddf12948feb220ec5432e14b75e0baa)
(cherry picked from commit 17c548c09298472af65526f1334fecffd1e72d1e)
(cherry picked from commit 02d31865174d94273e993248aa152f482fa14802)
(cherry picked from commit f02a040fa27afdbcf12d197894e9adc0a8a17734)
(cherry picked from commit 3cf9f82b282fe62d2124e1d3c1d75ea5f92ddce0)
(cherry picked from commit aa9d06dbac2a14cde066f0c1f896c3993a49aae0)
(cherry picked from commit 689421315464c16462938b3dbd710978e1fd14f3)

models/auth/source.go

@@ -292,6 +292,17 @@ 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"
 )
@@ -234,6 +235,39 @@ 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)