initial commit

tests/integration/oauth2_token_exchange_scope_subset_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"
+	"testing"
+	"time"
+)
+
+// TestOAuth2TokenExchangeScopeSubset verifies that the token response
+// contains the scopes that were actually granted.
+func TestOAuth2TokenExchangeScopeSubset(t *testing.T) {
+	client := newTestClient(t)
+	appOwner := createTestAccount(t, client)
+	endUser := createTestAccount(t, client)
+
+	redirectURI := "https://example.com/token/scopes"
+	appID, _, _, clientSecret := createOAuth2Application(
+		t, client, appOwner,
+		fmt.Sprintf("Scope Test %d", time.Now().UnixNano()),
+		[]string{redirectURI},
+		[]string{"identify", "email", "guilds"},
+	)
+
+	requestedScopes := []string{"identify", "email"}
+
+	authCode, _ := authorizeOAuth2(
+		t,
+		client,
+		endUser.Token,
+		appID,
+		redirectURI,
+		requestedScopes,
+		"",
+		"",
+		"",
+	)
+
+	tokenResp := exchangeOAuth2AuthorizationCode(
+		t, client,
+		appID,
+		clientSecret,
+		authCode,
+		redirectURI,
+		"",
+	)
+
+	if tokenResp.Scope != "identify email" {
+		t.Fatalf("expected scope 'identify email', got %q", tokenResp.Scope)
+	}
+
+	introspection := introspectOAuth2Token(t, client, appID, clientSecret, tokenResp.AccessToken)
+	if introspection.Scope != "identify email" {
+		t.Fatalf("introspection scope should be 'identify email', got %s", introspection.Scope)
+	}
+}