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add test for one-shot encoding/decoding with offset

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PiperOrigin-RevId: 595407007
This commit is contained in:
Evgenii Kliuchnikov 2024-01-03 08:18:15 -08:00 committed by Copybara-Service
parent fa084310d1
commit 082c9626a4
1 changed files with 39 additions and 7 deletions
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46
java/org/brotli/wrapper/dec/CornerCasesTest.java
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@ -6,11 +6,11 @@
package org.brotli.wrapper.dec;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertArrayEquals;
import java.io.IOException;
import org.brotli.integration.BrotliJniTestBase;
import org.brotli.wrapper.enc.Encoder;
import java.io.IOException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@ -18,16 +18,48 @@ import org.junit.runners.JUnit4;
/** Tests for {@link org.brotli.wrapper.enc.Encoder}. */
@RunWith(JUnit4.class)
public class CornerCasesTest extends BrotliJniTestBase {
private static byte[] makeInput(int len) {
byte[] dst = new byte[len];
for (int i = 0; i < len; ++i) {
dst[i] = (byte) Integer.bitCount(i);
}
return dst;
}
private static byte[] embedChunk(byte[] src, int offset, int padding) {
int len = src.length;
byte[] dst = new byte[offset + len + padding];
// TODO(eustas): fill with garbage?
System.arraycopy(src, 0, dst, offset, len);
return dst;
}
@Test
public void testPowerOfTwoInput() throws IOException {
// 24 == max window bits to ensure ring-buffer size is not greater than input.
int len = 1 << 24;
byte[] data = new byte[len];
for (int i = 0; i < len; ++i) {
data[i] = (byte) Integer.bitCount(i);
}
byte[] data = makeInput(len);
byte[] encoded = Encoder.compress(data);
byte[] decoded = Decoder.decompress(encoded);
assertEquals(len, decoded.length);
assertArrayEquals(data, decoded);
}
@Test
public void testInputOffset() throws IOException {
int inputLength = 19;
int inputOffset = 4;
int inputPadding = 7;
byte[] data = makeInput(inputLength);
byte[] input = embedChunk(data, inputOffset, inputPadding);
byte[] encoded = Encoder.compress(input, inputOffset, inputLength);
int outputLength = encoded.length;
int outputOffset = 9;
int outputPadding = 5;
byte[] output = embedChunk(encoded, outputOffset, outputPadding);
byte[] decoded = Decoder.decompress(output, outputOffset, outputLength);
assertArrayEquals(data, decoded);
}
}