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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /webmcp/imperative/unregister-during-executeTool.https.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>WebMCP executeTool with Unregistered Cross-Origin Tool</title>
<link rel="author" href="mailto:dom@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="resources/helpers.js"></script>
</head>
<body>
<script>
const host_info = get_host_info();
promise_test(async t => {
const iframe = document.createElement('iframe');
iframe.src = `${host_info.HTTPS_REMOTE_ORIGIN}/webmcp/imperative/resources/iframe-register-tool.html`;
iframe.allow = 'tools *';
const load_promise = new Promise(resolve => iframe.onload = resolve);
document.body.appendChild(iframe);
t.add_cleanup(() => iframe.remove());
await load_promise;
// 1. Tell the cross-origin iframe to register an endless tool,
// exposing it to the parent origin.
const toolchange_promise = new Promise(resolve => {
navigator.modelContext.addEventListener('toolchange', resolve, { once: true });
});
iframe.contentWindow.postMessage({
action: 'register',
tool: {
name: 'endless_tool',
description: 'Endless tool in iframe'
},
options: { exposedTo: [self.origin] },
hangsForever: true
}, '*');
await toolchange_promise;
const tools = await navigator.modelContext.getTools();
const tool = tools.find(t => t.name === 'endless_tool');
assert_true(!!tool, 'Tool should be registered and visible to parent');
const execute_promise = navigator.modelContext.executeTool(tool, '{}');
// Wait briefly to ensure the execution message has started, and that the
// execution request is now "pending", such that tool unregistration will
// reject `execute_promise`.
await new Promise(resolve => t.step_timeout(resolve, 100));
// 3. Unregister the tool in the target iframe while execution is pending.
iframe.contentWindow.postMessage({
action: 'unregister',
name: 'endless_tool'
}, '*');
await promise_rejects_dom(t, 'UnknownError', execute_promise, 'Pending execution Promise should reject with UnknownError when the target tool is unregistered');
}, 'Pending executeTool() Promise is rejected when the target cross-origin tool is unregistered');
</script>
</body>
</html>