| /* |
| * 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.jackrabbit.oak.segment.azure.journal; |
| |
| import com.microsoft.azure.storage.StorageException; |
| import com.microsoft.azure.storage.blob.CloudAppendBlob; |
| import com.microsoft.azure.storage.blob.CloudBlobContainer; |
| import org.apache.jackrabbit.oak.segment.azure.AzuriteDockerRule; |
| import org.apache.jackrabbit.oak.segment.azure.ReverseFileReader; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.net.URISyntaxException; |
| import java.security.InvalidKeyException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Random; |
| |
| public class ReverseFileReaderTest { |
| |
| @ClassRule |
| public static AzuriteDockerRule azurite = new AzuriteDockerRule(); |
| |
| private CloudBlobContainer container; |
| |
| @Before |
| public void setup() throws StorageException, InvalidKeyException, URISyntaxException { |
| container = azurite.getContainer("oak-test"); |
| getBlob().createOrReplace(); |
| } |
| |
| private CloudAppendBlob getBlob() throws URISyntaxException, StorageException { |
| return container.getAppendBlobReference("test-blob"); |
| } |
| |
| @Test |
| public void testReverseReader() throws IOException, URISyntaxException, StorageException { |
| List<String> entries = createFile( 1024, 80); |
| ReverseFileReader reader = new ReverseFileReader(getBlob(), 256); |
| assertEquals(entries, reader); |
| } |
| |
| @Test |
| public void testEmptyFile() throws IOException, URISyntaxException, StorageException { |
| List<String> entries = createFile( 0, 80); |
| ReverseFileReader reader = new ReverseFileReader(getBlob(), 256); |
| assertEquals(entries, reader); |
| } |
| |
| @Test |
| public void test1ByteBlock() throws IOException, URISyntaxException, StorageException { |
| List<String> entries = createFile( 10, 16); |
| ReverseFileReader reader = new ReverseFileReader(getBlob(), 1); |
| assertEquals(entries, reader); |
| } |
| |
| |
| private List<String> createFile(int lines, int maxLineLength) throws IOException, URISyntaxException, StorageException { |
| Random random = new Random(); |
| List<String> entries = new ArrayList<>(); |
| CloudAppendBlob blob = getBlob(); |
| for (int i = 0; i < lines; i++) { |
| int entrySize = random.nextInt(maxLineLength) + 1; |
| String entry = randomString(entrySize); |
| try { |
| blob.appendText(entry + '\n'); |
| } catch (StorageException e) { |
| throw new IOException(e); |
| } |
| entries.add(entry); |
| } |
| |
| entries.add(""); |
| Collections.reverse(entries); |
| return entries; |
| } |
| |
| private static void assertEquals(List<String> entries, ReverseFileReader reader) throws IOException { |
| int i = entries.size(); |
| for (String e : entries) { |
| Assert.assertEquals("line " + (--i), e, reader.readLine()); |
| } |
| Assert.assertNull(reader.readLine()); |
| } |
| |
| private static String randomString(int entrySize) { |
| Random r = new Random(); |
| |
| StringBuilder result = new StringBuilder(); |
| for (int i = 0; i < entrySize; i++) { |
| result.append((char) ('a' + r.nextInt('z' - 'a'))); |
| } |
| |
| return result.toString(); |
| } |
| } |