| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.curator.framework.imps; |
| |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.concurrent.ThreadLocalRandom; |
| import java.util.zip.GZIPOutputStream; |
| |
| public class TestGzipCompressionProvider |
| { |
| @Test |
| public void testSimple() throws IOException |
| { |
| GzipCompressionProvider provider = new GzipCompressionProvider(); |
| byte[] data = "Hello, world!".getBytes(); |
| byte[] compressedData = provider.compress(null, data); |
| byte[] jdkCompressedData = jdkCompress(data); |
| Assert.assertTrue(Arrays.equals(compressedData, jdkCompressedData)); |
| byte[] decompressedData = provider.decompress(null, compressedData); |
| Assert.assertTrue(Arrays.equals(decompressedData, data)); |
| } |
| |
| @Test |
| public void testEmpty() throws IOException |
| { |
| GzipCompressionProvider provider = new GzipCompressionProvider(); |
| byte[] compressedData = provider.compress(null, new byte[0]); |
| byte[] compressedData2 = GzipCompressionProvider.doCompress(new byte[0]); |
| byte[] jdkCompress = jdkCompress(new byte[0]); |
| // Ensures GzipCompressionProvider.COMPRESSED_EMPTY_BYTES value is valid |
| Assert.assertTrue(Arrays.equals(compressedData, compressedData2)); |
| Assert.assertTrue(Arrays.equals(compressedData, jdkCompress)); |
| byte[] decompressedData = provider.decompress(null, compressedData); |
| Assert.assertEquals(0, decompressedData.length); |
| } |
| |
| /** |
| * This test ensures that in the face of corrupt data, specifically IOException is thrown, rather some other kind |
| * of runtime exception. Users of {@link GzipCompressionProvider#decompress(String, byte[])} may depend on this. |
| */ |
| @Test |
| public void testDecompressCorrupt() |
| { |
| GzipCompressionProvider provider = new GzipCompressionProvider(); |
| try { |
| provider.decompress(null, new byte[100]); |
| Assert.fail("Expected IOException"); |
| } catch (IOException ignore) { |
| // expected |
| } |
| byte[] compressedData = provider.compress(null, new byte[0]); |
| for (int i = 0; i < compressedData.length; i++) |
| { |
| try { |
| provider.decompress(null, Arrays.copyOf(compressedData, i)); |
| } catch (IOException ignore) { |
| // expected |
| } |
| for (int change = 1; change < 256; change++) |
| { |
| byte b = compressedData[i]; |
| compressedData[i] = (byte) (b + change); |
| try { |
| provider.decompress(null, compressedData); |
| // No exception is OK |
| } catch (IOException ignore) { |
| // expected |
| } |
| // reset value back |
| compressedData[i] = b; |
| } |
| } |
| } |
| |
| @Test |
| public void smokeTestRandomDataWithJdk() throws IOException |
| { |
| GzipCompressionProvider provider = new GzipCompressionProvider(); |
| ThreadLocalRandom random = ThreadLocalRandom.current(); |
| for (int len = 1; len < 100; len++) |
| { |
| byte[] data = new byte[len]; |
| for (int i = 0; i < 100; i++) { |
| byte[] compressedData = provider.compress(null, data); |
| byte[] jdkCompressedData = jdkCompress(data); |
| Assert.assertTrue(Arrays.equals(compressedData, jdkCompressedData)); |
| byte[] decompressedData = provider.decompress(null, compressedData); |
| Assert.assertTrue(Arrays.equals(decompressedData, data)); |
| // in the end of the iteration to test empty array first |
| random.nextBytes(data); |
| } |
| } |
| } |
| |
| private static byte[] jdkCompress(byte[] data) throws IOException |
| { |
| ByteArrayOutputStream bytes = new ByteArrayOutputStream(); |
| try (GZIPOutputStream out = new GZIPOutputStream(bytes)) { |
| out.write(data); |
| out.finish(); |
| } |
| return bytes.toByteArray(); |
| } |
| } |