buffer-is-detached.https.window.js

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This WPT test may be referenced by the following Test IDs:
- /bluetooth/characteristic/writeValue/buffer-is-detached.https.window.html - WPT Dashboard Interop Dashboard

// META: script=/resources/testdriver.js

// META: script=/resources/testdriver-vendor.js

// META: script=/bluetooth/resources/bluetooth-test.js

// META: script=/bluetooth/resources/bluetooth-fake-devices.js

'use strict';

const test_desc = 'Detached buffers are safe to pass to writeValue()';

function detachBuffer(buffer) {

  window.postMessage('', '*', [buffer]);

bluetooth_test(async (t) => {

  const {characteristic, fake_characteristic} =

      await getMeasurementIntervalCharacteristic();

  let lastValue, lastWriteType;

  ({lastValue, lastWriteType} =

       await fake_characteristic.getLastWrittenValue());

  assert_equals(lastValue, null);

  assert_equals(lastWriteType, 'none');

  await fake_characteristic.setNextWriteResponse(GATT_SUCCESS);

  const typed_array = Uint8Array.of(1, 2);

  detachBuffer(typed_array.buffer);

  await characteristic.writeValue(typed_array);

  ({lastValue, lastWriteType} =

       await fake_characteristic.getLastWrittenValue());

  assert_array_equals(lastValue, []);

  assert_equals(lastWriteType, 'default-deprecated');

  await fake_characteristic.setNextWriteResponse(GATT_SUCCESS);

  const array_buffer = Uint8Array.of(3, 4).buffer;

  detachBuffer(array_buffer);

  await characteristic.writeValue(array_buffer);

  ({lastValue, lastWriteType} =

       await fake_characteristic.getLastWrittenValue());

  assert_array_equals(lastValue, []);

  assert_equals(lastWriteType, 'default-deprecated');

}, test_desc);