| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title></title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/manual.js"></script> |
| </head> |
| <body> |
| <p> |
| These tests require a USB device to be connected. |
| </p> |
| <script> |
| const kGetDescriptorRequest = 0x06; |
| const kDeviceDescriptorType = 0x01; |
| const kDeviceDescriptorLength = 18; |
| |
| manual_usb_test(async (t, device) => { |
| await device.open(); |
| t.add_cleanup(async () => { |
| await device.close(); |
| }); |
| |
| // This test exercises the behavior that the device remains open when it |
| // is reset. If the device changes its properties too drastically when |
| // reset it may appear to disconnect instead. |
| await device.reset(); |
| |
| // Read the device descriptor in order to validate that communication |
| // with the device is still possible after a reset. |
| const result = await device.controlTransferIn({ |
| requestType: 'standard', |
| recipient: 'device', |
| request: kGetDescriptorRequest, |
| value: kDeviceDescriptorType << 8, |
| index: 0, |
| }, kDeviceDescriptorLength); |
| |
| assert_equals(result.status, 'ok', 'transfer status'); |
| assert_equals( |
| result.data.byteLength, kDeviceDescriptorLength, 'transfer length'); |
| }, 'reset() does not disconnect the device'); |
| </script> |
| </body> |
| </html> |
