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// META: script=/resources/test-only-api.js
// META: script=/serial/resources/common.js
// META: script=resources/automation.js
// ParityError is not (as of 2020/03/23) a valid DOMException, so cannot use
// promise_rejects_dom for it.
async function promise_rejects_with_parity_error(t, promise) {
return promise
.then(() => {
assert_false('Should have rejected');
})
.catch(e => {
assert_equals(e.constructor, DOMException);
assert_equals(e.name, 'ParityError');
});
}
serial_test(async (t, fake) => {
const {port, fakePort} = await getFakeSerialPort(fake);
// Select a buffer size smaller than the amount of data transferred.
await port.open({baudRate: 9600, bufferSize: 64});
let readable = port.readable;
let reader = readable.getReader();
await fakePort.writable();
const data = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]);
fakePort.write(data);
fakePort.simulateParityError();
let {value, done} = await reader.read();
assert_false(done);
compareArrays(data, value);
await promise_rejects_with_parity_error(t, reader.read());
assert_not_equals(port.readable, readable);
readable = port.readable;
assert_true(readable instanceof ReadableStream);
reader = port.readable.getReader();
await fakePort.writable();
fakePort.write(data);
({value, done} = await reader.read());
assert_false(done);
compareArrays(data, value);
reader.releaseLock();
await port.close();
assert_equals(port.readable, null);
}, 'Parity error closes readable and replaces it with a new stream');
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