File: usbDevice_claimInterface-manual.https.html

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<!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>
      manual_usb_test(async (t, device) => {
        await device.open();
        const interfacesClaimed = [];
        t.add_cleanup(async () => {
          for (const iface of interfacesClaimed) {
            await device.releaseInterface(iface.interfaceNumber);
          }
          await device.close();
        });

        await device.selectConfiguration(1);

        const promises = [];
        for (const iface of device.configuration.interfaces) {
          const promise = device.claimInterface(iface.interfaceNumber);
          promises.push(promise);

          // Create a subtest for each interface so that success or failure to
          // claim the interface is visible but does not affect the result of
          // the overall test.
          promise_test(async (t) => {
            await promise;

            interfacesClaimed.push(iface);
          }, `Can claim interface ${iface.interfaceNumber}`);
        }

        await Promise.allSettled(promises);
      }, 'claimInterface() resolves or rejects for all interfaces');
    </script>
  </body>
</html>