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* 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 org.junit.Test;

import org.usb4java.DescriptorUtils;

import org.usb4java.LibUsb;

/**

* Tests the {@link DescriptorUtils} class.

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

public class DescriptorUtilsTest

{

/**

* Tests the {@link DescriptorUtils#decodeBCD(short)} method.

@Test

public void testDecodeBCD()

{

assertEquals("10.20", DescriptorUtils.decodeBCD((short) 0x1020));

}

/**

* Tests the {@link DescriptorUtils#getSpeedName(int)} method.

@Test

public void testGetSpeedName()

{

assertEquals("Super", DescriptorUtils.getSpeedName(LibUsb.SPEED_SUPER));

assertEquals("Full", DescriptorUtils.getSpeedName(LibUsb.SPEED_FULL));

assertEquals("High", DescriptorUtils.getSpeedName(LibUsb.SPEED_HIGH));

assertEquals("Low", DescriptorUtils.getSpeedName(LibUsb.SPEED_LOW));

assertEquals("Unknown",

DescriptorUtils.getSpeedName(LibUsb.SPEED_UNKNOWN));

}

/**

* Tests the {@link DescriptorUtils#getDirectionName(byte)} method.

@Test

public void testGetDirectionName()

{

assertEquals("IN", DescriptorUtils.getDirectionName(LibUsb.ENDPOINT_IN));

assertEquals("OUT", DescriptorUtils.getDirectionName(LibUsb.ENDPOINT_OUT));

}

/**

* Tests the {@link DescriptorUtils#getSynchTypeName(byte)} method.

@Test

public void testGetSynchTypeName()

{

assertEquals("None", DescriptorUtils.getSynchTypeName((byte) 0));

assertEquals("Asynchronous", DescriptorUtils.getSynchTypeName((byte) 4));

assertEquals("Adaptive", DescriptorUtils.getSynchTypeName((byte) 8));

assertEquals("Synchronous", DescriptorUtils.getSynchTypeName((byte) 12));

}

/**

* Tests the {@link DescriptorUtils#getUsageTypeName(byte)} method.

@Test

public void testGetUsageTypeName()

{

assertEquals("Data", DescriptorUtils.getUsageTypeName((byte) 0));

assertEquals("Feedback", DescriptorUtils.getUsageTypeName((byte) 16));

assertEquals("Implicit Feedback Data",

DescriptorUtils.getUsageTypeName((byte) 32));

assertEquals("Reserved", DescriptorUtils.getUsageTypeName((byte) 48));

}

/**

* Tests the {@link DescriptorUtils#getTransferTypeName(byte)} method.

@Test

public void testGetTransferTypeName()

{

assertEquals("Control", DescriptorUtils.getTransferTypeName((byte) 0));

assertEquals("Isochronous", DescriptorUtils.getTransferTypeName((byte) 1));

assertEquals("Bulk", DescriptorUtils.getTransferTypeName((byte) 2));

assertEquals("Interrupt", DescriptorUtils.getTransferTypeName((byte) 3));

}

/**

* Tests the {@link DescriptorUtils#getUSBClassName(byte)} method.

@Test

public void testGetUSBClassName()

{

assertEquals("Audio",

DescriptorUtils.getUSBClassName(LibUsb.CLASS_AUDIO));

assertEquals("Unknown", DescriptorUtils.getUSBClassName((byte) 0xF3));

}

/**

* Tests the {@link DescriptorUtils#dump(java.nio.ByteBuffer)} method.

@Test

public void testDumpByteBuffer()

{

ByteBuffer bytes = ByteBuffer.allocate(0);

assertEquals("", DescriptorUtils.dump(bytes));

bytes = ByteBuffer.allocate(8);

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

assertEquals("01 02 03 04 05 06 07 08", DescriptorUtils.dump(bytes));

bytes = ByteBuffer.allocate(16);

bytes.put(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,

15, 16 });

assertEquals("01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10",

DescriptorUtils.dump(bytes));

bytes = ByteBuffer.allocate(20);

bytes.put(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20 });

assertEquals(String.format("01 02 03 04 05 06 07 08 09 0a 0b 0c 0d " +

"0e 0f 10%n11 12 13 14"), DescriptorUtils.dump(bytes));

}

/**

* Ensure constructor is private.

* @throws Exception

* When constructor test fails.

@Test

public void testPrivateConstructor() throws Exception

{

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

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

c.setAccessible(true);

c.newInstance();

}

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