initial commit

tests/integration/oauth2_token_refresh.go

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package integration
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"testing"
+)
+
+// refreshOAuth2Token refreshes an OAuth2 access token using a refresh token.
+func refreshOAuth2Token(t testing.TB, client *testClient, clientID string, clientSecret string, refreshToken string) oauth2TokenResponse {
+	t.Helper()
+	if clientSecret == "" {
+		clientSecret = getClientSecret(t, clientID)
+	}
+	form := url.Values{
+		"grant_type":    {"refresh_token"},
+		"refresh_token": {refreshToken},
+	}
+
+	var resp *http.Response
+	var err error
+
+	form.Set("client_id", clientID)
+	req, reqErr := http.NewRequest(http.MethodPost, fmt.Sprintf("%s/oauth2/token", client.baseURL), strings.NewReader(form.Encode()))
+	if reqErr != nil {
+		t.Fatalf("failed to build token refresh request: %v", reqErr)
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	req.SetBasicAuth(clientID, clientSecret)
+	client.applyCommonHeaders(req)
+	resp, err = client.httpClient.Do(req)
+
+	if err != nil {
+		t.Fatalf("failed to refresh oauth2 token: %v", err)
+	}
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("oauth2 token refresh failed with status %d: %s", resp.StatusCode, readResponseBody(resp))
+	}
+
+	var token oauth2TokenResponse
+	decodeJSONResponse(t, resp, &token)
+	if token.AccessToken == "" {
+		t.Fatalf("oauth2 token refresh response missing access_token")
+	}
+	return token
+}