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/*
* Copyright (C) 2014 Klaus Reimer <k@ailis.de>
* See LICENSE.md for licensing information.
*/
package org.usb4java;
import static org.junit.Assert.assertEquals;
import static org.usb4java.test.UsbAssume.assumeHotplugAvailable;
import static org.usb4java.test.UsbAssume.isUsbTestsEnabled;
import java.util.ArrayList;
import java.util.List;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
/**
* Tests the hotplug part of the {@link LibUsb} class.
*
* @author Klaus Reimer (k@ailis.de)
*/
public class LibUsbHotplugTest
{
/** The libusb context. */
private Context context;
/**
* Set up the test.
*/
@Before
public void setUp()
{
if (isUsbTestsEnabled())
{
this.context = new Context();
LibUsb.init(this.context);
}
}
/**
* Tear down the test.
*/
@After
public void tearDown()
{
if (isUsbTestsEnabled())
{
if (this.context != null)
{
LibUsb.exit(this.context);
}
}
}
/**
* Tests the enumeration of connected devices through the hotplug API. This
* test simply compares the number of enumerated devices with the device
* list. When no devices are connected then this test is pretty much useless
* but won't fail because of that.
*/
@Test
public void testHotplugEnumeration()
{
assumeHotplugAvailable();
final List<Integer> events = new ArrayList<Integer>();
HotplugCallbackHandle callbackHandle = new HotplugCallbackHandle();
int result = LibUsb.hotplugRegisterCallback(this.context,
LibUsb.HOTPLUG_EVENT_DEVICE_ARRIVED,
LibUsb.HOTPLUG_ENUMERATE,
LibUsb.HOTPLUG_MATCH_ANY,
LibUsb.HOTPLUG_MATCH_ANY,
LibUsb.HOTPLUG_MATCH_ANY,
new HotplugCallback()
{
@Override
public int processEvent(Context context, Device device,
int event,
Object userData)
{
events.add(event);
return 0;
}
}, null, callbackHandle);
assertEquals(result, LibUsb.SUCCESS);
LibUsb.hotplugDeregisterCallback(this.context, callbackHandle);
DeviceList devices = new DeviceList();
LibUsb.getDeviceList(this.context, devices);
int numDevices = devices.getSize();
LibUsb.freeDeviceList(devices, true);
assertEquals(numDevices, events.size());
}
/**
* Ensures that no hotplug event is fired when enumeration is deactivated.
* When no devices are connected then this test is pretty much useless but
* won't fail because of that.
*/
@Test
public void testHotplugEnumerationOff()
{
assumeHotplugAvailable();
final List<Integer> events = new ArrayList<Integer>();
HotplugCallbackHandle callbackHandle = new HotplugCallbackHandle();
int result = LibUsb.hotplugRegisterCallback(this.context,
LibUsb.HOTPLUG_EVENT_DEVICE_ARRIVED,
0,
LibUsb.HOTPLUG_MATCH_ANY,
LibUsb.HOTPLUG_MATCH_ANY,
LibUsb.HOTPLUG_MATCH_ANY,
new HotplugCallback()
{
@Override
public int processEvent(Context context, Device device,
int event,
Object userData)
{
events.add(event);
return 0;
}
}, null, callbackHandle);
assertEquals(result, LibUsb.SUCCESS);
LibUsb.hotplugDeregisterCallback(this.context, callbackHandle);
assertEquals(0, events.size());
}
}