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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.assertNotEquals;

import static org.junit.Assert.assertNotNull;

import static org.junit.Assert.assertNotSame;

import static org.junit.Assert.assertNull;

import static org.junit.Assert.fail;

import java.lang.reflect.Field;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import org.usb4java.Context;

import org.usb4java.DeviceHandle;

import org.usb4java.LibUsb;

import org.usb4java.Transfer;

/**

* Tests the {@link Transfer} class.

*

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

*/

public class TransferTest

{

/** 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 allocating and freeing a transfer object.

*/

@Test

public void testAllocAndFree()

{

assumeUsbTestsEnabled();

final Transfer transfer = LibUsb.allocTransfer(0);

assertNotNull(transfer);

LibUsb.freeTransfer(transfer);

try

{

LibUsb.freeTransfer(transfer);

fail("Double-free should throw IllegalStateException");

}

catch (final IllegalStateException e)

{

// Expected behavior

}

}

/**

* Sets the device handle pointer via reflection.

*

* @param handle

* The device handle pointer.

* @param pointer

* The pointer to set.

*/

private void setPointer(final DeviceHandle handle, final long pointer)

{

try

{

final Field field = DeviceHandle.class

.getDeclaredField("deviceHandlePointer");

field.setAccessible(true);

field.set(handle, pointer);

}

catch (final Exception e)

{

throw new RuntimeException(e.toString(), e);

}

}

/**

* Tests the {@link Transfer#setDevHandle(DeviceHandle)} and

* {@link Transfer#devHandle()} methods.

*/

@Test

public void testDevHandle()

{

assumeUsbTestsEnabled();

final Transfer transfer = LibUsb.allocTransfer(0);

final DeviceHandle handle = new DeviceHandle();

this.setPointer(handle, 1);

final DeviceHandle handle2 = new DeviceHandle();

this.setPointer(handle2, 2);

assertNull(transfer.devHandle());

transfer.setDevHandle(handle);

assertNotNull(transfer.devHandle());

assertNotSame(handle, transfer.devHandle());

assertNotEquals(handle2, transfer.devHandle());

assertEquals(handle, transfer.devHandle());

transfer.setDevHandle(null);

assertNull(transfer.devHandle());

LibUsb.freeTransfer(transfer);

}

/**

* Tests the {@link Transfer#setFlags(byte)} and {@link Transfer#flags()}

* methods.

*/

@Test

public void testFlags()

{

assumeUsbTestsEnabled();

final Transfer transfer = LibUsb.allocTransfer(0);

assertEquals(0, transfer.flags());

transfer.setFlags((byte) 1);

assertEquals(1, transfer.flags());

transfer.setFlags((byte) 0);

assertEquals(0, transfer.flags());

LibUsb.freeTransfer(transfer);

}

/**

* Tests the {@link Transfer#setEndpoint(byte)} and

* {@link Transfer#endpoint()} methods.

*/

@Test

public void testEndpoint()

{

assumeUsbTestsEnabled();

final Transfer transfer = LibUsb.allocTransfer(0);

assertEquals(0, transfer.endpoint());

transfer.setEndpoint((byte) 1);

assertEquals(1, transfer.endpoint());

transfer.setEndpoint((byte) 0);

assertEquals(0, transfer.endpoint());

LibUsb.freeTransfer(transfer);

}

/**

* Tests the {@link Transfer#setType(byte)} and {@link Transfer#type()}

* methods.

*/

@Test

public void testType()

{

assumeUsbTestsEnabled();

final Transfer transfer = LibUsb.allocTransfer(0);

assertEquals(0, transfer.type());

transfer.setType((byte) 1);

assertEquals(1, transfer.type());

transfer.setType((byte) 0);

assertEquals(0, transfer.type());

LibUsb.freeTransfer(transfer);

}

/**

* Tests the {@link Transfer#setTimeout(long)} and

* {@link Transfer#timeout()} methods.

*/

@Test

public void testTimeout()

{

assumeUsbTestsEnabled();

final Transfer transfer = LibUsb.allocTransfer(0);

assertEquals(0, transfer.timeout());

transfer.setTimeout(1);

assertEquals(1, transfer.timeout());

transfer.setTimeout(0);

assertEquals(0, transfer.timeout());

LibUsb.freeTransfer(transfer);

}

/**

* Tests the {@link Transfer#status()} methods.

*/

@Test

public void testGetStatus()

{

assumeUsbTestsEnabled();

final Transfer transfer = LibUsb.allocTransfer(0);

assertEquals(0, transfer.status());

LibUsb.freeTransfer(transfer);

}

}