| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| |
| async function readFromFile(f) { |
| const {buffer, readBytes} = await f.read(new Uint8Array(4), 0); |
| return buffer; |
| } |
| |
| async function writeToFile(f) { |
| const writeBuffer = new Uint8Array(4); |
| writeBuffer.set([75, 76, 77, 78]); |
| |
| await storageFoundation.requestCapacity(4); |
| |
| const {writtenBytes} = await f.write(writeBuffer, 0); |
| await f.flush(); |
| return writtenBytes == 4; |
| } |
| |
| async function readWriteTest() { |
| const bc = new PrerenderChannel('prerender-channel'); |
| assert_true(document.prerendering); |
| |
| let f = await storageFoundation.open('test_file'); |
| const readBuffer = await readFromFile(f); |
| const writeResult = await writeToFile(f); |
| assert_true(writeResult); |
| |
| const writtenBuffer = await readFromFile(f); |
| await f.close(); |
| |
| bc.postMessage({ |
| readBuffer : readBuffer, |
| writtenBuffer : writtenBuffer |
| }); |
| bc.close(); |
| } |
| |
| readWriteTest(); |
| </script> |
