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Test Info:

// META: script=/resources/test-only-api.js
// META: script=/webusb/resources/fake-devices.js
// META: script=/webusb/resources/usb-helpers.js
'use strict';
usb_test(async () => {
const {device} = await getFakeDevice();
await device.open();
for (const configuration of device.configurations) {
await device.selectConfiguration(configuration.configurationValue);
assert_equals(device.configuration, configuration);
for (const interfaceObj of configuration.interfaces) {
await device.claimInterface(interfaceObj.interfaceNumber);
for (const alternate of interfaceObj.alternates) {
await device.selectAlternateInterface(
interfaceObj.interfaceNumber, alternate.alternateSetting);
assert_equals(interfaceObj.alternate, alternate);
}
await device.releaseInterface(interfaceObj.interfaceNumber);
}
}
await device.close();
}, '[SameObject] test for instances within USBDevice.');