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/*

* Copyright (C) 2013 Klaus Reimer <k@ailis.de>

* See LICENSE.md for licensing information.

*/

package org.usb4java;

import static org.usb4java.test.UsbAssume.assumeUsbTestsEnabled;

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertFalse;

import static org.junit.Assert.assertNotNull;

import static org.junit.Assert.assertTrue;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import org.usb4java.Context;

import org.usb4java.Device;

import org.usb4java.DeviceList;

import org.usb4java.LibUsb;

/**

* Tests the global-scope methods of the {@link LibUsb} class which need a

* open USB context.

*

* @author Klaus Reimer (k@ailis.de)

*/

public class LibUsbGlobalTest

{

/** The libusb contxet. */

private Context context;

/**

* Set up the test.

*/

@Before

public void setUp()

{

this.context = new Context();

try

{

LibUsb.init(this.context);

}

catch (final Throwable e)

{

this.context = null;

}

}

/**

* Tear down the test.

*/

@After

public void tearDown()

{

if (this.context != null)

{

LibUsb.exit(this.context);

}

}

/**

* Tests the {@link LibUsb#setDebug(Context, int)} method.

*/

@Test

public void testSetDebug()

{

assumeUsbTestsEnabled();

LibUsb.setDebug(this.context, LibUsb.LOG_LEVEL_DEBUG);

LibUsb.setDebug(this.context, LibUsb.LOG_LEVEL_INFO);

LibUsb.setDebug(this.context, LibUsb.LOG_LEVEL_WARNING);

LibUsb.setDebug(this.context, LibUsb.LOG_LEVEL_ERROR);

LibUsb.setDebug(this.context, LibUsb.LOG_LEVEL_NONE);

}

/**

* Test getting and freeing the device list.

*/

@Test

public void testDeviceList()

{

assumeUsbTestsEnabled();

final DeviceList list = new DeviceList();

final int result = LibUsb.getDeviceList(this.context, list);

assertTrue(

"At least one USB device must be present for the simple unit tests",

result > 0);

assertEquals(result, list.getSize());

int i = 0;

for (final Device device : list)

{

assertNotNull(device);

assertEquals(device, list.get(i));

assertEquals(Device.class, device.getClass());

i++;

}

LibUsb.freeDeviceList(list, true);

}

/**

* Test {@link LibUsb#getDeviceList(Context, DeviceList)} without specifying

* a list container.

*/

@Test(expected = IllegalArgumentException.class)

public void testGetDeviceListWithoutList()

{

assumeUsbTestsEnabled();

LibUsb.getDeviceList(this.context, null);

}

/**

* Checks the {@link LibUsb#le16ToCpu(short)} and

* {@link LibUsb#cpuToLe16(short)} methods.

*/

@Test

public void testEndianConversion()

{

assumeUsbTestsEnabled();

assertEquals(0x1234, LibUsb.le16ToCpu(LibUsb.cpuToLe16((short) 0x1234)));

}

/**

* Tests the {@link LibUsb#hasCapability(int)} method.

*/

@Test

public void testHasCapability()

{

assumeUsbTestsEnabled();

assertTrue(LibUsb.hasCapability(LibUsb.CAP_HAS_CAPABILITY));

assertFalse(LibUsb.hasCapability(0x12345678));

}

/**

* Tests the {@link LibUsb#errorName(int)} method.

*/

@Test

public void testErrorName()

{

assumeUsbTestsEnabled();

assertEquals("LIBUSB_ERROR_IO", LibUsb.errorName(LibUsb.ERROR_IO));

assertEquals("**UNKNOWN**", LibUsb.errorName(0x1234));

}

/**

* Tests the {@link LibUsb#strError(int)} method.

*/

@Test

public void testStrError()

{

assumeUsbTestsEnabled();

assertEquals("Input/Output Error", LibUsb.strError(LibUsb.ERROR_IO));

assertEquals("Other error", LibUsb.strError(0x1234));

}

/**

* Tests the {@link LibUsb#setLocale(String)} method.

*/

@Test

public void testSetLocale()

{

assumeUsbTestsEnabled();

assertEquals(LibUsb.SUCCESS, LibUsb.setLocale("en"));

assertEquals(LibUsb.ERROR_NOT_FOUND, LibUsb.setLocale("zz"));

assertEquals(LibUsb.ERROR_INVALID_PARAM, LibUsb.setLocale("zzz"));

}

}