| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| package libcore.java.util.zip; |
| |
| import java.util.zip.DataFormatException; |
| import java.util.zip.Deflater; |
| import java.util.zip.Inflater; |
| import junit.framework.TestCase; |
| |
| public class DeflaterTest extends TestCase { |
| |
| private byte[] compressed = new byte[32]; |
| private byte[] decompressed = new byte[20]; |
| private Deflater deflater = new Deflater(); |
| private Inflater inflater = new Inflater(); |
| private int totalDeflated = 0; |
| private int totalInflated = 0; |
| |
| public void testDeflate() throws DataFormatException { |
| deflater.setInput(new byte[] { 1, 2, 3 }); |
| deflateInflate(Deflater.NO_FLUSH); |
| assertTrue(totalInflated < 3); |
| assertEquals(0, decompressed[2]); // the 3rd byte shouldn't have been flushed yet |
| |
| deflater.setInput(new byte[] { 4, 5, 6 }); |
| deflateInflate(Deflater.SYNC_FLUSH); |
| assertEquals(6, totalInflated); |
| assertDecompressed(1, 2, 3, 4, 5, 6); |
| assertEquals(0, inflater.inflate(decompressed)); |
| |
| deflater.setInput(new byte[] { 7, 8, 9 }); |
| deflateInflate(Deflater.FULL_FLUSH); |
| assertEquals(9, totalInflated); |
| assertDecompressed(1, 2, 3, 4, 5, 6, 7, 8, 9); |
| assertEquals(0, inflater.inflate(decompressed)); |
| inflater = new Inflater(true); // safe because we did a FULL_FLUSH |
| |
| deflater.setInput(new byte[] { 10, 11, 12 }); |
| deflateInflate(Deflater.SYNC_FLUSH); |
| assertEquals(12, totalInflated); |
| assertDecompressed(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12); |
| assertEquals(0, inflater.inflate(decompressed)); |
| } |
| |
| private void deflateInflate(int flush) throws DataFormatException { |
| int lastDeflated = deflater.deflate(compressed, totalDeflated, |
| compressed.length - totalDeflated, flush); |
| assertTrue(inflater.needsInput()); |
| inflater.setInput(compressed, totalDeflated, lastDeflated); |
| totalDeflated += lastDeflated; |
| totalInflated += inflater.inflate(decompressed, totalInflated, |
| decompressed.length - totalInflated); |
| } |
| |
| private void assertDecompressed(int... expected) { |
| for (int i = 0; i < decompressed.length; i++) { |
| int expectedValue = i < expected.length ? expected[i] : 0; |
| assertEquals(expectedValue, decompressed[i]); |
| } |
| } |
| } |