| /** |
| * 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.hadoop.hdfs.server.namenode; |
| |
| import static org.junit.Assert.assertEquals; |
| import java.util.Arrays; |
| |
| import org.apache.hadoop.hdfs.DFSUtil; |
| import org.junit.Test; |
| |
| /** |
| * |
| */ |
| public class TestPathComponents { |
| |
| @Test |
| public void testBytes2ByteArrayFQ() throws Exception { |
| testString("/", new String[]{null}); |
| testString("//", new String[]{null}); |
| testString("/file", new String[]{"", "file"}); |
| testString("/dir/", new String[]{"", "dir"}); |
| testString("//file", new String[]{"", "file"}); |
| testString("/dir//file", new String[]{"", "dir", "file"}); |
| testString("//dir/dir1//", new String[]{"", "dir", "dir1"}); |
| testString("//dir//dir1//", new String[]{"", "dir", "dir1"}); |
| testString("//dir//dir1//file", new String[]{"", "dir", "dir1", "file"}); |
| } |
| |
| @Test |
| public void testBytes2ByteArrayRelative() throws Exception { |
| testString("file", new String[]{"file"}); |
| testString("dir/", new String[]{"dir"}); |
| testString("dir//", new String[]{"dir"}); |
| testString("dir//file", new String[]{"dir", "file"}); |
| testString("dir/dir1//", new String[]{"dir", "dir1"}); |
| testString("dir//dir1//", new String[]{"dir", "dir1"}); |
| testString("dir//dir1//file", new String[]{"dir", "dir1", "file"}); |
| } |
| |
| @Test |
| public void testByteArray2PathStringRoot() { |
| byte[][] components = DFSUtil.getPathComponents("/"); |
| assertEquals("", DFSUtil.byteArray2PathString(components, 0, 0)); |
| assertEquals("/", DFSUtil.byteArray2PathString(components, 0, 1)); |
| } |
| |
| @Test |
| public void testByteArray2PathStringFQ() { |
| byte[][] components = DFSUtil.getPathComponents("/1/2/3"); |
| assertEquals("/1/2/3", DFSUtil.byteArray2PathString(components)); |
| |
| assertEquals("", DFSUtil.byteArray2PathString(components, 0, 0)); |
| assertEquals("/", DFSUtil.byteArray2PathString(components, 0, 1)); |
| assertEquals("/1", DFSUtil.byteArray2PathString(components, 0, 2)); |
| assertEquals("/1/2", DFSUtil.byteArray2PathString(components, 0, 3)); |
| assertEquals("/1/2/3", DFSUtil.byteArray2PathString(components, 0, 4)); |
| |
| assertEquals("", DFSUtil.byteArray2PathString(components, 1, 0)); |
| assertEquals("1", DFSUtil.byteArray2PathString(components, 1, 1)); |
| assertEquals("1/2", DFSUtil.byteArray2PathString(components, 1, 2)); |
| assertEquals("1/2/3", DFSUtil.byteArray2PathString(components, 1, 3)); |
| } |
| |
| @Test |
| public void testByteArray2PathStringRelative() { |
| byte[][] components = DFSUtil.getPathComponents("1/2/3"); |
| assertEquals("1/2/3", DFSUtil.byteArray2PathString(components)); |
| |
| assertEquals("", DFSUtil.byteArray2PathString(components, 0, 0)); |
| assertEquals("1", DFSUtil.byteArray2PathString(components, 0, 1)); |
| assertEquals("1/2", DFSUtil.byteArray2PathString(components, 0, 2)); |
| assertEquals("1/2/3", DFSUtil.byteArray2PathString(components, 0, 3)); |
| |
| assertEquals("", DFSUtil.byteArray2PathString(components, 1, 0)); |
| assertEquals("2", DFSUtil.byteArray2PathString(components, 1, 1)); |
| assertEquals("2/3", DFSUtil.byteArray2PathString(components, 1, 2)); |
| } |
| |
| public void testString(String path, String[] expected) throws Exception { |
| byte[][] components = DFSUtil.getPathComponents(path); |
| String[] actual = new String[components.length]; |
| for (int i=0; i < components.length; i++) { |
| if (components[i] != null) { |
| actual[i] = DFSUtil.bytes2String(components[i]); |
| } |
| } |
| assertEquals(Arrays.asList(expected), Arrays.asList(actual)); |
| |
| // test the reconstituted path |
| path = path.replaceAll("/+", "/"); |
| if (path.length() > 1) { |
| path = path.replaceAll("/$", ""); |
| } |
| assertEquals(path, DFSUtil.byteArray2PathString(components)); |
| } |
| } |