1 | /** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one |
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3 | * or more contributor license agreements. See the NOTICE file |
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4 | * distributed with this work for additional information |
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5 | * regarding copyright ownership. The ASF licenses this file |
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6 | * to you under the Apache License, Version 2.0 (the |
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7 | * "License"); you may not use this file except in compliance |
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8 | * with the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.hadoop.hdfs; |
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19 | |
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20 | import junit.framework.TestCase; |
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21 | import java.io.*; |
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22 | import org.apache.hadoop.conf.Configuration; |
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23 | import org.apache.hadoop.fs.FileSystem; |
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24 | import org.apache.hadoop.fs.Path; |
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25 | |
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26 | /** |
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27 | * This class tests the DFS class via the FileSystem interface in a single node |
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28 | * mini-cluster. |
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29 | */ |
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30 | public class TestLocalDFS extends TestCase { |
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31 | |
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32 | private void writeFile(FileSystem fileSys, Path name) throws IOException { |
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33 | DataOutputStream stm = fileSys.create(name); |
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34 | stm.writeBytes("oom"); |
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35 | stm.close(); |
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36 | } |
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37 | |
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38 | private void readFile(FileSystem fileSys, Path name) throws IOException { |
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39 | DataInputStream stm = fileSys.open(name); |
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40 | byte[] buffer = new byte[4]; |
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41 | int bytesRead = stm.read(buffer, 0 , 4); |
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42 | assertEquals("oom", new String(buffer, 0 , bytesRead)); |
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43 | stm.close(); |
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44 | } |
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45 | |
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46 | private void cleanupFile(FileSystem fileSys, Path name) throws IOException { |
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47 | assertTrue(fileSys.exists(name)); |
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48 | fileSys.delete(name, true); |
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49 | assertTrue(!fileSys.exists(name)); |
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50 | } |
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51 | |
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52 | static String getUserName(FileSystem fs) { |
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53 | if (fs instanceof DistributedFileSystem) { |
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54 | return ((DistributedFileSystem)fs).dfs.ugi.getUserName(); |
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55 | } |
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56 | return System.getProperty("user.name"); |
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57 | } |
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58 | |
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59 | /** |
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60 | * Tests get/set working directory in DFS. |
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61 | */ |
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62 | public void testWorkingDirectory() throws IOException { |
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63 | Configuration conf = new Configuration(); |
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64 | MiniDFSCluster cluster = new MiniDFSCluster(conf, 1, true, null); |
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65 | FileSystem fileSys = cluster.getFileSystem(); |
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66 | try { |
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67 | Path orig_path = fileSys.getWorkingDirectory(); |
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68 | assertTrue(orig_path.isAbsolute()); |
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69 | Path file1 = new Path("somewhat/random.txt"); |
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70 | writeFile(fileSys, file1); |
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71 | assertTrue(fileSys.exists(new Path(orig_path, file1.toString()))); |
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72 | fileSys.delete(file1, true); |
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73 | Path subdir1 = new Path("/somewhere"); |
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74 | fileSys.setWorkingDirectory(subdir1); |
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75 | writeFile(fileSys, file1); |
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76 | cleanupFile(fileSys, new Path(subdir1, file1.toString())); |
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77 | Path subdir2 = new Path("else"); |
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78 | fileSys.setWorkingDirectory(subdir2); |
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79 | writeFile(fileSys, file1); |
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80 | readFile(fileSys, file1); |
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81 | cleanupFile(fileSys, new Path(new Path(subdir1, subdir2.toString()), |
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82 | file1.toString())); |
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83 | |
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84 | // test home directory |
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85 | Path home = new Path("/user/" + getUserName(fileSys)) |
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86 | .makeQualified(fileSys); |
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87 | Path fsHome = fileSys.getHomeDirectory(); |
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88 | assertEquals(home, fsHome); |
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89 | |
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90 | } finally { |
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91 | fileSys.close(); |
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92 | cluster.shutdown(); |
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93 | } |
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94 | } |
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95 | } |
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