initial commit

tests/integration/oauth2_token_exchange_without_authentication_test.go

@@ -0,0 +1,74 @@
+/*
+ * 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"
+	"testing"
+	"time"
+)
+
+// TestOAuth2TokenExchangeWithoutAuthentication verifies that applications require authentication.
+func TestOAuth2TokenExchangeWithoutAuthentication(t *testing.T) {
+	client := newTestClient(t)
+	appOwner := createTestAccount(t, client)
+	endUser := createTestAccount(t, client)
+
+	redirectURI := "https://example.com/token/no-auth"
+	appID, _, _, _ := createOAuth2Application(
+		t, client, appOwner,
+		fmt.Sprintf("No Auth %d", time.Now().UnixNano()),
+		[]string{redirectURI},
+		[]string{"identify"},
+	)
+
+	authCode, _ := authorizeOAuth2(
+		t,
+		client,
+		endUser.Token,
+		appID,
+		redirectURI,
+		[]string{"identify"},
+		"",
+		"",
+		"",
+	)
+
+	form := map[string][]string{
+		"grant_type":   {"authorization_code"},
+		"code":         {authCode},
+		"redirect_uri": {redirectURI},
+		"client_id":    {appID},
+	}
+
+	resp, err := client.postForm("/oauth2/token", form, "")
+	if err != nil {
+		t.Fatalf("request failed: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		t.Fatal("application should require authentication")
+	}
+	if resp.StatusCode != http.StatusUnauthorized {
+		t.Fatalf("expected 401 for missing auth, got %d", resp.StatusCode)
+	}
+}