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package com.bumptech.glide.gifdecoder.test;
import org.junit.Test;
import java.nio.ByteBuffer;
import java.util.Arrays;
import static org.junit.Assert.assertArrayEquals;
/**
* Tests for {@link com.bumptech.glide.gifdecoder.test.GifBytesTestUtil}.
*/
public class GifBytesTestUtilTest {
@Test
public void testWriteHeaderAndLsdWithoutGct() {
ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.HEADER_LENGTH);
GifBytesTestUtil.writeHeaderAndLsd(buffer, 8, 16, false, 0);
byte[] expected = new byte[] { 0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x00, 0x08, 0x00, 0x10, 0x20, 0x00, 0x00};
assertArrayEquals(expected, buffer.array());
}
@Test
public void testWriteHeaderAndLsdWithGct() {
ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.HEADER_LENGTH);
GifBytesTestUtil.writeHeaderAndLsd(buffer, 8, 16, true, 4);
byte[] expected = new byte[] { 0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x00, 0x08, 0x00, 0x10, (byte) 0xA4, 0x00,
0x00};
assertArrayEquals(expected, buffer.array());
}
@Test
public void testWriteImageDescriptorWithoutColorTable() {
ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.IMAGE_DESCRIPTOR_LENGTH);
GifBytesTestUtil.writeImageDescriptor(buffer, 10, 9, 8, 7, false, 0);
byte[] expected = new byte[] {
// Image separator.
0x2C,
// Image left.
0x00, 0x0A,
// Image right.
0x00, 0X09,
// Image width.
0x00, 0x08,
// Image height.
0x00, 0x07,
// Packed field.
0x00
};
assertArrayEquals(expected, buffer.array());
}
@Test
public void testWriteImageDescriptorWithColorTable() {
ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.IMAGE_DESCRIPTOR_LENGTH);
GifBytesTestUtil.writeImageDescriptor(buffer, 10, 9, 8, 7, true, 4);
byte packedField =
// Set LCT flag
(byte) 0x80
// Size of color table (2^(N + 1) == 4)
| 0x01;
byte[] expected = new byte[] {
// Image separator.
0x2C,
// Image left.
0x00, 0x0A,
// Image right.
0x00, 0X09,
// Image width.
0x00, 0x08,
// Image height.
0x00, 0x07,
packedField
};
assertArrayEquals(expected, buffer.array());
}
@Test
public void testWriteColorTable() {
final int numColors = 4;
ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.getColorTableLength(numColors));
GifBytesTestUtil.writeColorTable(buffer, numColors);
byte[] expected = new byte[] {
// First color.
0x00, 0x00, 0x00,
// Second color.
0x00, 0x00, 0x01,
// Third color.
0x00, 0x00, 0x02,
// Fourth color.
0x00, 0x00, 0x03,
};
assertArrayEquals("expected=" + Arrays.toString(expected) + " received=" + Arrays.toString(buffer.array()),
expected, buffer.array());
}
@Test
public void testWriteFakeImageData() {
ByteBuffer buffer = ByteBuffer.allocate(4);
GifBytesTestUtil.writeFakeImageData(buffer, 2);
byte[] expected = new byte[] { 0x02, 0x01, 0x01, 0x00 };
assertArrayEquals(expected, buffer.array());
}
}
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