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cinny/src/app/plugins/call/CallWidgetDriver.rtcTransports.test.ts
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import { test } from 'node:test';
import assert from 'node:assert/strict';
import type { MatrixClient } from 'matrix-js-sdk';
import { CallWidgetDriver } from './CallWidgetDriver';
// MSC4515: Element Call (widget mode) asks the host for RTC transports. Without a
// working answer every call fails with MISSING_MATRIX_RTC_TRANSPORT.
function fakeClient(opts: {
serverTransports?: unknown[] | Error;
wellKnown?: Record<string, unknown>;
}): MatrixClient {
return {
getDeviceId: () => 'DEV',
getSafeUserId: () => '@me:example.org',
_unstable_getRTCTransports: async () => {
if (opts.serverTransports instanceof Error) throw opts.serverTransports;
return opts.serverTransports ?? [];
},
getClientWellKnown: () => opts.wellKnown,
} as unknown as MatrixClient;
}
const focus = { type: 'livekit', livekit_service_url: 'https://matrix.example.org' };
test('getRtcTransports prefers the homeserver MSC4143 endpoint', async () => {
const driver = new CallWidgetDriver(fakeClient({ serverTransports: [focus] }), '!r:x');
const r = await driver.getRtcTransports();
assert.deepEqual(r.rtc_transports, [focus]);
});
test('getRtcTransports falls back to .well-known rtc_foci when the endpoint 404s', async () => {
const driver = new CallWidgetDriver(
fakeClient({
serverTransports: new Error('404'),
wellKnown: { 'org.matrix.msc4143.rtc_foci': [focus, { junk: true }, null] },
}),
'!r:x',
);
const r = await driver.getRtcTransports();
assert.deepEqual(r.rtc_transports, [focus]);
});
test('getRtcTransports returns an empty list when nothing is advertised', async () => {
const driver = new CallWidgetDriver(
fakeClient({ serverTransports: [], wellKnown: { 'm.homeserver': {} } }),
'!r:x',
);
const r = await driver.getRtcTransports();
assert.deepEqual(r.rtc_transports, []);
});
test('the MSC4515 capability is granted to the call widget', async () => {
const driver = new CallWidgetDriver(fakeClient({}), '!r:x');
const allowed = await driver.validateCapabilities(
new Set(['org.matrix.msc4515.rtc_transports', 'org.example.not_allowed']),
);
assert.deepEqual(Array.from(allowed), ['org.matrix.msc4515.rtc_transports']);
});