webtransport-h3.https.sub.any.js

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /infrastructure/server/webtransport-h3.https.sub.any.html - WPT Dashboard Interop Dashboard
- /infrastructure/server/webtransport-h3.https.sub.any.serviceworker.html - WPT Dashboard Interop Dashboard
- /infrastructure/server/webtransport-h3.https.sub.any.sharedworker.html - WPT Dashboard Interop Dashboard
- /infrastructure/server/webtransport-h3.https.sub.any.worker.html - WPT Dashboard Interop Dashboard

// META: global=window,worker

// META: script=/common/get-host-info.sub.js

const HOST = get_host_info().ORIGINAL_HOST;

const PORT = '{{ports[webtransport-h3][0]}}';

const BASE = `https://${HOST}:${PORT}`;

promise_test(async t => {

    const wt = new WebTransport(`${BASE}/webtransport/handlers/echo.py`);

    // When a connection fails `closed` attribute will be rejected.

    wt.closed.catch((error) => {

        t.unreached_func(`The 'closed' attribute should not be rejected: ${error}`);

});

    await wt.ready;

    const stream = await wt.createBidirectionalStream();

    const writer = stream.writable.getWriter();

    await writer.write(new Uint8Array([42]));

    writer.releaseLock();

    const reader = stream.readable.getReader();

    const { value } = await reader.read();

    assert_equals(value[0], 42);

}, "WebTransport server should be running and should handle a bidirectional stream");