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// 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 () => {
let { device } = await getFakeDevice();
let configuration = new USBConfiguration(
device, device.configurations[1].configurationValue);
let usbInterface = new USBInterface(
configuration, configuration.interfaces[0].interfaceNumber);
assertDeviceInfoEquals(
usbInterface, fakeDeviceInit.configurations[1].interfaces[0]);
}, 'Can construct a USBInterface.');
usb_test(async () => {
let { device } = await getFakeDevice();
let configuration = new USBConfiguration(
device, device.configurations[1].configurationValue);
try {
let usbInterface = new USBInterface(
configuration, configuration.interfaces.length);
assert_unreached('USBInterface should reject an invalid interface number');
} catch (error) {
assert_equals(error.name, 'RangeError');
}
}, 'Constructing a USBInterface with an invalid interface number ' +
'throws a range error.');
usb_test(async () => {
let { device } = await getFakeDevice();
await device.open();
await device.selectConfiguration(2);
let configuration = new USBConfiguration(
device, device.configurations[1].configurationValue);
let usbInterface = new USBInterface(
configuration, configuration.interfaces[0].interfaceNumber);
assert_equals(usbInterface.alternate.alternateSetting, 0);
}, 'The alternate attribute of USBInterface returns the one with ' +
'bAlternateSetting 0 if the interface has not been claimed.');
usb_test(async () => {
let { device } = await getFakeDevice();
await device.open();
await device.selectConfiguration(2);
await device.claimInterface(0);
let configuration = new USBConfiguration(
device, device.configurations[1].configurationValue);
let usbInterface = new USBInterface(
configuration, configuration.interfaces[0].interfaceNumber);
assert_equals(usbInterface.alternate.alternateSetting, 0);
await device.selectAlternateInterface(0, 1);
assert_equals(usbInterface.alternate.alternateSetting, 1);
}, 'The alternate attribute of USBInterface returns the active alternate ' +
'interface.');
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