taler-typescript-core

commit c414146fe31041cad9ce618e3968f27189f95a00
parent b79efd6f9786ac59089571d18ce88fd262b0b0a1
Author: Florian Dold <dold@taler.net>
Date:   Tue, 21 Jul 2026 11:03:12 +0200

util: test that cancellation is exception-safe

Diffstat:
A
packages/taler-util/src/CancellationToken.test.ts
 | 
38
++++++++++++++++++++++++++++++++++++++

1 file changed, 38 insertions(+), 0 deletions(-)
diff --git a/packages/taler-util/src/CancellationToken.test.ts b/packages/taler-util/src/CancellationToken.test.ts
@@ -0,0 +1,38 @@
+/*
+ This file is part of GNU Taler
+ (C) 2026 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+import assert from "node:assert";
+import { test } from "node:test";
+import { CancellationToken } from "./CancellationToken.js";
+
+test("cancellation notifies every listener even if one throws", (t) => {
+  const source = CancellationToken.create();
+  const ran: string[] = [];
+  source.token.onCancelled(() => ran.push("first"));
+  source.token.onCancelled(() => {
+    throw Error("listener blew up");
+  });
+  source.token.onCancelled(() => ran.push("third"));
+
+  // Listeners release sockets and clear timers.  One badly behaved consumer
+  // must not keep the others from cleaning up, and must not propagate out of
+  // cancel() into whoever requested the cancellation.
+  assert.doesNotThrow(() => source.cancel());
+  assert.deepStrictEqual(ran, ["first", "third"]);
+  assert.strictEqual(source.token.isCancelled, true);
+  // The token is settled, so its callback set has been released.
+  assert.strictEqual((source.token as any)._callbacks, undefined);
+});