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/* Copyright 2015 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
package org.brotli.dec;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link BitReader}.
*/
@RunWith(JUnit4.class)
public class BitReaderTest {
@Test
public void testReadAfterEos() {
State reader = new State();
Decode.initState(reader, new ByteArrayInputStream(new byte[1]));
BitReader.readBits(reader, 9);
try {
BitReader.checkHealth(reader, 0);
} catch (BrotliRuntimeException ex) {
// This exception is expected.
return;
}
fail("BrotliRuntimeException should have been thrown by BitReader.checkHealth");
}
@Test
public void testAccumulatorUnderflowDetected() {
State reader = new State();
Decode.initState(reader, new ByteArrayInputStream(new byte[8]));
// 65 bits is enough for both 32 and 64 bit systems.
BitReader.readBits(reader, 13);
BitReader.readBits(reader, 13);
BitReader.readBits(reader, 13);
BitReader.readBits(reader, 13);
BitReader.readBits(reader, 13);
try {
BitReader.fillBitWindow(reader);
} catch (IllegalStateException ex) {
// This exception is expected.
return;
}
fail("IllegalStateException should have been thrown by 'broken' BitReader");
}
}
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