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// META: script=/resources/test-only-api.js
// META: script=/serial/resources/common.js
// META: script=resources/automation.js
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});
const reader = port.readable.getReader();
await fakePort.writable();
const data = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]);
fakePort.write(data);
fakePort.simulateDisconnectOnRead();
const {value, done} = await reader.read();
assert_false(done);
compareArrays(data, value);
await promise_rejects_dom(t, 'NetworkError', reader.read());
assert_equals(port.readable, null);
await port.close();
}, 'Disconnect error closes readable and sets it to null');
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