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// META: global=window,worker
// META: script=/common/get-host-info.sub.js
// META: script=resources/webtransport-test-helpers.sub.js
// META: script=/common/utils.js
promise_test(async t => {
// Establish a WebTransport session.
const wt = new WebTransport(webtransport_url('echo.py'));
await wt.ready;
// Create a bidirectional stream with sendorder
const {readable, writable} = await wt.createBidirectionalStream({sendOrder: 3});
assert_equals(writable.sendOrder, 3);
// Write a message to the writable end, and close it.
const writer = writable.getWriter();
const encoder = new TextEncoder();
writer.write(encoder.encode('Hello World')).catch(() => {});
await writer.close();
// Read the data on the readable end.
const reply = await read_stream_as_string(readable);
// Check that the message from the readable end matches the writable end.
assert_equals(reply, 'Hello World');
}, 'WebTransport client should be able to create and handle a bidirectional stream with sendOrder');
promise_test(async t => {
// Establish a WebTransport session.
const wt = new WebTransport(webtransport_url('echo.py'));
await wt.ready;
// Create a bidirectional stream with sendorder
const {readable, writable} = await wt.createBidirectionalStream();
assert_equals(writable.sendOrder, null);
// modify it
writable.sendOrder = 4;
assert_equals(writable.sendOrder, 4);
}, 'WebTransport client should be able to modify unset sendOrder after stream creation');
promise_test(async t => {
// Establish a WebTransport session.
const wt = new WebTransport(webtransport_url('echo.py'));
await wt.ready;
// Create a bidirectional stream without sendorder
const {readable, writable} = await wt.createBidirectionalStream({sendOrder: 3});
assert_equals(writable.sendOrder, 3);
// modify it
writable.sendOrder = 5;
assert_equals(writable.sendOrder, 5);
writable.sendOrder = null;
assert_equals(writable.sendOrder, null);
// Note: this doesn't verify the underlying stack actually changes priority, just the API
// for controlling sendOrder
}, 'WebTransport client should be able to modify existing sendOrder after stream creation');
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