native-io/concurrent_io/concurrent_io_setLength_async.tentative.https.any.js

// META: title=NativeIO API: Concurrent io while setLength is resolving.
// META: global=window,worker
// META: script=operation_helpers.js
// META: script=../resources/support.js

'use strict';

// See documentation in operation_helpers.js

for (let op of kOperations) {
  promise_test(async testCase => {
    const file = await createFile(testCase, 'setlength_file');

    const res = op.prepare();

    const setLengthPromise = file.setLength(5);
    op.assertRejection(testCase, file, res);

    await setLengthPromise;

    const readSharedArrayBuffer = new SharedArrayBuffer(5);
    const readBytes = new Uint8Array(readSharedArrayBuffer);
    assert_equals(await file.read(readBytes, 0), 5,
                  `NativeIOFile.read() should not fail after a rejected ` +
                    `${op.name}() during setLength().`);
    assert_array_equals(readBytes, [64, 65, 66, 67, 0],
                        `Rejecting ${op.name}() during setLength()` +
                          ` should not change the file.`);
    op.assertUnchanged(res);
  }, `${op.name}() rejects while setLength() is resolving.`);
};