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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.jpeg;
import com.drew.metadata.MetadataException;
import org.junit.Before;
import org.junit.Test;
import static com.drew.metadata.jpeg.JpegDirectory.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
/**
* @author Drew Noakes https://drewnoakes.com
*/
public class JpegDescriptorTest
{
private JpegDirectory _directory;
private JpegDescriptor _descriptor;
@Before
public void setUp() throws Exception
{
_directory = new JpegDirectory();
_descriptor = new JpegDescriptor(_directory);
}
@Test
public void testGetComponentDataDescription_InvalidComponentNumber() throws Exception
{
assertNull(_descriptor.getComponentDataDescription(1));
}
@Test
public void testGetImageWidthDescription() throws Exception
{
_directory.setInt(TAG_IMAGE_WIDTH, 123);
assertEquals("123 pixels", _descriptor.getImageWidthDescription());
assertEquals("123 pixels", _directory.getDescription(TAG_IMAGE_WIDTH));
}
@Test
public void testGetImageHeightDescription() throws Exception
{
_directory.setInt(TAG_IMAGE_HEIGHT, 123);
assertEquals("123 pixels", _descriptor.getImageHeightDescription());
assertEquals("123 pixels", _directory.getDescription(TAG_IMAGE_HEIGHT));
}
@Test
public void testGetDataPrecisionDescription() throws Exception
{
_directory.setInt(TAG_DATA_PRECISION, 8);
assertEquals("8 bits", _descriptor.getDataPrecisionDescription());
assertEquals("8 bits", _directory.getDescription(TAG_DATA_PRECISION));
}
@Test
public void testGetComponentDescription() throws MetadataException
{
JpegComponent component1 = new JpegComponent(1, 0x22, 0);
_directory.setObject(TAG_COMPONENT_DATA_1, component1);
assertEquals("Y component: Quantization table 0, Sampling factors 2 horiz/2 vert", _directory.getDescription(TAG_COMPONENT_DATA_1));
assertEquals("Y component: Quantization table 0, Sampling factors 2 horiz/2 vert", _descriptor.getComponentDataDescription(0));
}
}
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