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/*

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

* See LICENSE.md for licensing information.

*/

package org.usb4java;

import static org.junit.Assert.assertEquals;

import java.lang.reflect.Constructor;

import java.nio.ByteBuffer;

import java.nio.IntBuffer;

import java.nio.LongBuffer;

import org.junit.Test;

import org.usb4java.BufferUtils;

/**

* Tests the {@link BufferUtils} class.

*

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

*/

public class BufferUtilsTest

{

/**

* Tests the {@link BufferUtils#allocateByteBuffer(int)} method.

*/

@Test

public void testAllocateByteBuffer()

{

ByteBuffer buffer = BufferUtils.allocateByteBuffer(13);

assertEquals(13, buffer.limit());

}

/**

* Tests the {@link BufferUtils#allocateIntBuffer()} method.

*/

@Test

public void testAllocateIntBuffer()

{

IntBuffer buffer = BufferUtils.allocateIntBuffer();

assertEquals(1, buffer.limit());

}

/**

* Tests the {@link BufferUtils#allocateLongBuffer()} method.

*/

@Test

public void testAllocateLongBuffer()

{

LongBuffer buffer = BufferUtils.allocateLongBuffer();

assertEquals(1, buffer.limit());

}

/**

* Tests the {@link BufferUtils#slice(ByteBuffer, int, int)} method.

*/

@Test

public void testSlice()

{

ByteBuffer buffer = BufferUtils.allocateByteBuffer(10);

buffer.put(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 });

buffer.rewind();

ByteBuffer sliced = BufferUtils.slice(buffer, 2, 3);

assertEquals(3, sliced.remaining());

assertEquals(3, sliced.get());

assertEquals(4, sliced.get());

assertEquals(5, sliced.get());

}

/**

* Ensure constructor is private.

*

* @throws Exception

* When constructor test fails.

*/

@Test

public void testPrivateConstructor() throws Exception

{

assertEquals(0, BufferUtils.class.getConstructors().length);

Constructor<?> c = BufferUtils.class.getDeclaredConstructor();

c.setAccessible(true);

c.newInstance();

}

}