AlternateUsbInterfaceTest.java 文件源码

@Test
public void getAlternateSetting() throws Exception {
    UsbDeviceConnection usbDeviceConnection = mockConnectionWithRawDescriptors(new byte[] {
            18, 1, 0, 2, 0, 0, 0, 64, -38, 11, 56, 40, 0, 1, 1, 2, 3, 1, // Device Descriptor
            9, 2, 34, 0, 2, 1, 4, -128, -6, // Configuration Descriptor
            9, 4, 0, 0, 1, -1, -1, -1, 5, // Interface Descriptor for interface 0 with alternate setting 0
            9, 4, 0, 1, 1, -1, -1, -1, 5, // Interface Descriptor for interface 0 with alternate setting 1
            7, 5, -127, 2, 0, 2, 0, // Endpoint Descriptor
            9, 4, 1, 0, 0, -1, -1, -1, 5 // Interface Descriptor for interface 1 with alternate setting 0
    });

    // Interface 0 has alternate settings {0, 1}
    UsbInterface i0 = mockInterface(0);
    assertThat(AlternateUsbInterface.forUsbInterface(usbDeviceConnection, i0),
            equalTo(asList(new AlternateUsbInterface(i0, 0), new AlternateUsbInterface(i0, 1))));

    // Interface 1 has alternate settings {0}
    UsbInterface i1 = mockInterface(1);
    assertThat(AlternateUsbInterface.forUsbInterface(usbDeviceConnection, i1),
            equalTo(singletonList(new AlternateUsbInterface(i1, 0))));
}