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/*
* Copyright 2002-2017 Drew Noakes
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* More information about this project is available at:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.metadata.exif;
import org.junit.Test;
import static com.drew.metadata.exif.ExifSubIFDDirectory.*;
import static org.junit.Assert.assertEquals;
/**
* JUnit test case for class ExifSubIFDDescriptor.
*
* @author Drew Noakes https://drewnoakes.com
*/
public class ExifSubIFDDescriptorTest
{
@Test
public void testUserCommentDescription_EmptyEncoding() throws Exception
{
byte[] commentBytes = "\0\0\0\0\0\0\0\0This is a comment".getBytes();
ExifSubIFDDirectory directory = new ExifSubIFDDirectory();
directory.setByteArray(TAG_USER_COMMENT, commentBytes);
ExifSubIFDDescriptor descriptor = new ExifSubIFDDescriptor(directory);
assertEquals("This is a comment", descriptor.getDescription(TAG_USER_COMMENT));
}
@Test
public void testUserCommentDescription_AsciiHeaderAsciiEncoding() throws Exception
{
byte[] commentBytes = "ASCII\0\0This is a comment".getBytes();
ExifSubIFDDirectory directory = new ExifSubIFDDirectory();
directory.setByteArray(TAG_USER_COMMENT, commentBytes);
ExifSubIFDDescriptor descriptor = new ExifSubIFDDescriptor(directory);
assertEquals("This is a comment", descriptor.getDescription(TAG_USER_COMMENT));
}
@Test
public void testUserCommentDescription_BlankAscii() throws Exception
{
byte[] commentBytes = "ASCII\0\0\0 ".getBytes();
ExifSubIFDDirectory directory = new ExifSubIFDDirectory();
directory.setByteArray(TAG_USER_COMMENT, commentBytes);
ExifSubIFDDescriptor descriptor = new ExifSubIFDDescriptor(directory);
assertEquals("", descriptor.getDescription(TAG_USER_COMMENT));
}
@Test
public void testUserCommentDescription_ZeroLengthAscii1() throws Exception
{
// the 10-byte encoding region is only partially full
byte[] commentBytes = "ASCII\0\0\0".getBytes();
ExifSubIFDDirectory directory = new ExifSubIFDDirectory();
directory.setByteArray(TAG_USER_COMMENT, commentBytes);
ExifSubIFDDescriptor descriptor = new ExifSubIFDDescriptor(directory);
assertEquals("ASCII", descriptor.getDescription(TAG_USER_COMMENT));
}
@Test
public void testUserCommentDescription_ZeroLengthAscii2() throws Exception
{
// fill the 10-byte encoding region
byte[] commentBytes = "ASCII\0\0\0\0\0".getBytes();
ExifSubIFDDirectory directory = new ExifSubIFDDirectory();
directory.setByteArray(TAG_USER_COMMENT, commentBytes);
ExifSubIFDDescriptor descriptor = new ExifSubIFDDescriptor(directory);
assertEquals("", descriptor.getDescription(TAG_USER_COMMENT));
}
@Test
public void testUnicodeComment_ActualBytes() throws Exception
{
byte[] commentBytes = new byte[] { 85, 78, 73, 67, 79, 68, 69, 0, 84, 0, 104, 0, 105, 0, 115, 0, 32, 0, 109, 0, 97, 0, 114, 0, 109, 0, 111, 0, 116, 0, 32, 0, 105, 0, 115, 0, 32, 0, 103, 0, 101, 0, 116, 0, 116, 0, 105, 0, 110, 0, 103, 0, 32, 0, 99, 0, 108, 0, 111, 0, 115, 0, 101, 0, 46, 0, 46, 0, 46, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0, 32, 0 };
ExifSubIFDDirectory directory = new ExifSubIFDDirectory();
directory.setByteArray(TAG_USER_COMMENT, commentBytes);
ExifSubIFDDescriptor descriptor = new ExifSubIFDDescriptor(directory);
assertEquals("This marmot is getting close...", descriptor.getDescription(TAG_USER_COMMENT));
}
@Test
public void testUnicodeComment_Ascii() throws Exception
{
byte[] commentBytes = new byte[] { 65, 83, 67, 73, 73, 0, 0, 0, 73, 32, 97, 109, 32, 97, 32, 99, 111, 109, 109, 101, 110, 116, 46, 32, 89, 101, 121, 46, 0 };
ExifSubIFDDirectory directory = new ExifSubIFDDirectory();
directory.setByteArray(TAG_USER_COMMENT, commentBytes);
ExifSubIFDDescriptor descriptor = new ExifSubIFDDescriptor(directory);
assertEquals("I am a comment. Yey.", descriptor.getDescription(TAG_USER_COMMENT));
}
}
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