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package com.bumptech.glide.gifdecoder;
import android.graphics.Bitmap;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.annotation.Config;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
/**
* Tests for {@link com.bumptech.glide.gifdecoder.GifDecoder}.
*/
@RunWith(RobolectricTestRunner.class)
@Config(emulateSdk = 18)
public class GifDecoderTest {
private MockProvider provider;
@Before
public void setUp() {
provider = new MockProvider();
}
@Test
public void testCanDecodeFramesFromTestGif() {
byte[] data = TestUtil.readResourceData("partial_gif_decode.gif");
GifHeaderParser headerParser = new GifHeaderParser();
headerParser.setData(data);
GifHeader header = headerParser.parseHeader();
GifDecoder decoder = new GifDecoder(provider);
decoder.setData(header, data);
decoder.advance();
Bitmap bitmap = decoder.getNextFrame();
assertNotNull(bitmap);
assertEquals(GifDecoder.STATUS_OK, decoder.getStatus());
}
@Test
public void testFrameIndexStartsAtNegativeOne() {
GifHeader gifheader = new GifHeader();
gifheader.frameCount = 4;
byte[] data = new byte[0];
GifDecoder decoder = new GifDecoder(provider);
decoder.setData(gifheader, data);
assertEquals(-1, decoder.getCurrentFrameIndex());
}
@Test
public void testAdvanceIncrementsFrameIndex() {
GifHeader gifheader = new GifHeader();
gifheader.frameCount = 4;
byte[] data = new byte[0];
GifDecoder decoder = new GifDecoder(provider);
decoder.setData(gifheader, data);
decoder.advance();
assertEquals(0, decoder.getCurrentFrameIndex());
}
@Test
public void testAdvanceWrapsIndexBackToZero() {
GifHeader gifheader = new GifHeader();
gifheader.frameCount = 2;
byte[] data = new byte[0];
GifDecoder decoder = new GifDecoder(provider);
decoder.setData(gifheader, data);
decoder.advance();
decoder.advance();
decoder.advance();
assertEquals(0, decoder.getCurrentFrameIndex());
}
@Test
public void testSettingDataResetsFramePointer() {
GifHeader gifheader = new GifHeader();
gifheader.frameCount = 4;
byte[] data = new byte[0];
GifDecoder decoder = new GifDecoder(provider);
decoder.setData(gifheader, data);
decoder.advance();
decoder.advance();
assertEquals(1, decoder.getCurrentFrameIndex());
decoder.setData(gifheader, data);
assertEquals(-1, decoder.getCurrentFrameIndex());
}
private static class MockProvider implements GifDecoder.BitmapProvider {
@Override
public Bitmap obtain(int width, int height, Bitmap.Config config) {
Bitmap result = Bitmap.createBitmap(width, height, config);
Robolectric.shadowOf(result).setMutable(true);
return result;
}
@Override
public void release(Bitmap bitmap) {
// Do nothing.
}
}
}
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