| // Copyright 2021 The Bazel Authors. All rights reserved. |
| // |
| // 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 com.google.devtools.build.lib.remote.zstd; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.github.luben.zstd.Zstd; |
| import com.github.luben.zstd.ZstdOutputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.Random; |
| import org.junit.Test; |
| |
| /** Extra tests for {@link ZstdDecompressingOutputStream} that are not tested internally. */ |
| public class ZstdDecompressingOutputStreamTestExtra { |
| @Test |
| public void streamCanBeDecompressedOneByteAtATime() throws IOException { |
| Random rand = new Random(); |
| byte[] data = new byte[50]; |
| rand.nextBytes(data); |
| byte[] compressed = Zstd.compress(data); |
| |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| try (ZstdDecompressingOutputStream zdos = new ZstdDecompressingOutputStream(baos)) { |
| for (byte b : compressed) { |
| zdos.write(b); |
| } |
| zdos.flush(); |
| } |
| |
| assertThat(baos.toByteArray()).isEqualTo(data); |
| } |
| |
| @Test |
| public void bytesWrittenMatchesDecompressedBytes() throws IOException { |
| byte[] data = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA".getBytes(UTF_8); |
| |
| ByteArrayOutputStream compressed = new ByteArrayOutputStream(); |
| try (ZstdOutputStream zos = new ZstdOutputStream(compressed)) { |
| zos.setCloseFrameOnFlush(true); |
| for (int i = 0; i < data.length; i++) { |
| zos.write(data[i]); |
| if (i % 5 == 0) { |
| // Create multiple frames of 5 bytes each. |
| zos.flush(); |
| } |
| } |
| } |
| |
| ByteArrayOutputStream decompressed = new ByteArrayOutputStream(); |
| try (ZstdDecompressingOutputStream zdos = new ZstdDecompressingOutputStream(decompressed)) { |
| for (byte b : compressed.toByteArray()) { |
| zdos.write(b); |
| zdos.flush(); |
| } |
| } |
| assertThat(decompressed.toByteArray()).isEqualTo(data); |
| } |
| } |