[120] | 1 | /** |
---|
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
---|
| 3 | * or more contributor license agreements. See the NOTICE file |
---|
| 4 | * distributed with this work for additional information |
---|
| 5 | * regarding copyright ownership. The ASF licenses this file |
---|
| 6 | * to you under the Apache License, Version 2.0 (the |
---|
| 7 | * "License"); you may not use this file except in compliance |
---|
| 8 | * with the License. You may obtain a copy of the License at |
---|
| 9 | * |
---|
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
---|
| 11 | * |
---|
| 12 | * Unless required by applicable law or agreed to in writing, software |
---|
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
---|
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
| 15 | * See the License for the specific language governing permissions and |
---|
| 16 | * limitations under the License. |
---|
| 17 | */ |
---|
| 18 | |
---|
| 19 | package org.apache.hadoop.io; |
---|
| 20 | |
---|
| 21 | import junit.framework.TestCase; |
---|
| 22 | |
---|
| 23 | import java.nio.ByteBuffer; |
---|
| 24 | import java.nio.charset.CharacterCodingException; |
---|
| 25 | import java.util.Random; |
---|
| 26 | |
---|
| 27 | /** Unit tests for LargeUTF8. */ |
---|
| 28 | public class TestText extends TestCase { |
---|
| 29 | private static final int NUM_ITERATIONS = 100; |
---|
| 30 | public TestText(String name) { super(name); } |
---|
| 31 | |
---|
| 32 | private static final Random RANDOM = new Random(1); |
---|
| 33 | |
---|
| 34 | private static final int RAND_LEN = -1; |
---|
| 35 | |
---|
| 36 | // generate a valid java String |
---|
| 37 | private static String getTestString(int len) throws Exception { |
---|
| 38 | StringBuffer buffer = new StringBuffer(); |
---|
| 39 | int length = (len==RAND_LEN) ? RANDOM.nextInt(1000) : len; |
---|
| 40 | while (buffer.length()<length) { |
---|
| 41 | int codePoint = RANDOM.nextInt(Character.MAX_CODE_POINT); |
---|
| 42 | char tmpStr[] = new char[2]; |
---|
| 43 | if (Character.isDefined(codePoint)) { |
---|
| 44 | //unpaired surrogate |
---|
| 45 | if (codePoint < Character.MIN_SUPPLEMENTARY_CODE_POINT && |
---|
| 46 | !Character.isHighSurrogate((char)codePoint) && |
---|
| 47 | !Character.isLowSurrogate((char)codePoint)) { |
---|
| 48 | Character.toChars(codePoint, tmpStr, 0); |
---|
| 49 | buffer.append(tmpStr); |
---|
| 50 | } |
---|
| 51 | } |
---|
| 52 | } |
---|
| 53 | return buffer.toString(); |
---|
| 54 | } |
---|
| 55 | |
---|
| 56 | public static String getTestString() throws Exception { |
---|
| 57 | return getTestString(RAND_LEN); |
---|
| 58 | } |
---|
| 59 | |
---|
| 60 | public static String getLongString() throws Exception { |
---|
| 61 | String str = getTestString(); |
---|
| 62 | int length = Short.MAX_VALUE+str.length(); |
---|
| 63 | StringBuffer buffer = new StringBuffer(); |
---|
| 64 | while(buffer.length()<length) |
---|
| 65 | buffer.append(str); |
---|
| 66 | |
---|
| 67 | return buffer.toString(); |
---|
| 68 | } |
---|
| 69 | |
---|
| 70 | public void testWritable() throws Exception { |
---|
| 71 | for (int i = 0; i < NUM_ITERATIONS; i++) { |
---|
| 72 | String str; |
---|
| 73 | if (i == 0) |
---|
| 74 | str = getLongString(); |
---|
| 75 | else |
---|
| 76 | str = getTestString(); |
---|
| 77 | TestWritable.testWritable(new Text(str)); |
---|
| 78 | } |
---|
| 79 | } |
---|
| 80 | |
---|
| 81 | |
---|
| 82 | public void testCoding() throws Exception { |
---|
| 83 | String before = "Bad \t encoding \t testcase"; |
---|
| 84 | Text text = new Text(before); |
---|
| 85 | String after = text.toString(); |
---|
| 86 | assertTrue(before.equals(after)); |
---|
| 87 | |
---|
| 88 | for (int i = 0; i < NUM_ITERATIONS; i++) { |
---|
| 89 | // generate a random string |
---|
| 90 | if (i == 0) |
---|
| 91 | before = getLongString(); |
---|
| 92 | else |
---|
| 93 | before = getTestString(); |
---|
| 94 | |
---|
| 95 | // test string to utf8 |
---|
| 96 | ByteBuffer bb = Text.encode(before); |
---|
| 97 | |
---|
| 98 | byte[] utf8Text = bb.array(); |
---|
| 99 | byte[] utf8Java = before.getBytes("UTF-8"); |
---|
| 100 | assertEquals(0, WritableComparator.compareBytes( |
---|
| 101 | utf8Text, 0, bb.limit(), |
---|
| 102 | utf8Java, 0, utf8Java.length)); |
---|
| 103 | |
---|
| 104 | // test utf8 to string |
---|
| 105 | after = Text.decode(utf8Java); |
---|
| 106 | assertTrue(before.equals(after)); |
---|
| 107 | } |
---|
| 108 | } |
---|
| 109 | |
---|
| 110 | |
---|
| 111 | public void testIO() throws Exception { |
---|
| 112 | DataOutputBuffer out = new DataOutputBuffer(); |
---|
| 113 | DataInputBuffer in = new DataInputBuffer(); |
---|
| 114 | |
---|
| 115 | for (int i = 0; i < NUM_ITERATIONS; i++) { |
---|
| 116 | // generate a random string |
---|
| 117 | String before; |
---|
| 118 | if (i == 0) |
---|
| 119 | before = getLongString(); |
---|
| 120 | else |
---|
| 121 | before = getTestString(); |
---|
| 122 | |
---|
| 123 | // write it |
---|
| 124 | out.reset(); |
---|
| 125 | Text.writeString(out, before); |
---|
| 126 | |
---|
| 127 | // test that it reads correctly |
---|
| 128 | in.reset(out.getData(), out.getLength()); |
---|
| 129 | String after = Text.readString(in); |
---|
| 130 | assertTrue(before.equals(after)); |
---|
| 131 | |
---|
| 132 | // Test compatibility with Java's other decoder |
---|
| 133 | int strLenSize = WritableUtils.getVIntSize(Text.utf8Length(before)); |
---|
| 134 | String after2 = new String(out.getData(), strLenSize, |
---|
| 135 | out.getLength()-strLenSize, "UTF-8"); |
---|
| 136 | assertTrue(before.equals(after2)); |
---|
| 137 | } |
---|
| 138 | } |
---|
| 139 | |
---|
| 140 | public void testCompare() throws Exception { |
---|
| 141 | DataOutputBuffer out1 = new DataOutputBuffer(); |
---|
| 142 | DataOutputBuffer out2 = new DataOutputBuffer(); |
---|
| 143 | DataOutputBuffer out3 = new DataOutputBuffer(); |
---|
| 144 | Text.Comparator comparator = new Text.Comparator(); |
---|
| 145 | for (int i=0; i<NUM_ITERATIONS; i++) { |
---|
| 146 | // reset output buffer |
---|
| 147 | out1.reset(); |
---|
| 148 | out2.reset(); |
---|
| 149 | out3.reset(); |
---|
| 150 | |
---|
| 151 | // generate two random strings |
---|
| 152 | String str1 = getTestString(); |
---|
| 153 | String str2 = getTestString(); |
---|
| 154 | if (i == 0) { |
---|
| 155 | str1 = getLongString(); |
---|
| 156 | str2 = getLongString(); |
---|
| 157 | } else { |
---|
| 158 | str1 = getTestString(); |
---|
| 159 | str2 = getTestString(); |
---|
| 160 | } |
---|
| 161 | |
---|
| 162 | // convert to texts |
---|
| 163 | Text txt1 = new Text(str1); |
---|
| 164 | Text txt2 = new Text(str2); |
---|
| 165 | Text txt3 = new Text(str1); |
---|
| 166 | |
---|
| 167 | // serialize them |
---|
| 168 | txt1.write(out1); |
---|
| 169 | txt2.write(out2); |
---|
| 170 | txt3.write(out3); |
---|
| 171 | |
---|
| 172 | // compare two strings by looking at their binary formats |
---|
| 173 | int ret1 = comparator.compare(out1.getData(), 0, out1.getLength(), |
---|
| 174 | out2.getData(), 0, out2.getLength()); |
---|
| 175 | // compare two strings |
---|
| 176 | int ret2 = txt1.compareTo(txt2); |
---|
| 177 | |
---|
| 178 | assertEquals(ret1, ret2); |
---|
| 179 | |
---|
| 180 | // test equal |
---|
| 181 | assertEquals(txt1.compareTo(txt3), 0); |
---|
| 182 | assertEquals(comparator.compare(out1.getData(), 0, out3.getLength(), |
---|
| 183 | out3.getData(), 0, out3.getLength()), 0); |
---|
| 184 | } |
---|
| 185 | } |
---|
| 186 | |
---|
| 187 | public void testFind() throws Exception { |
---|
| 188 | Text text = new Text("abcd\u20acbdcd\u20ac"); |
---|
| 189 | assertTrue(text.find("abd")==-1); |
---|
| 190 | assertTrue(text.find("ac")==-1); |
---|
| 191 | assertTrue(text.find("\u20ac")==4); |
---|
| 192 | assertTrue(text.find("\u20ac", 5)==11); |
---|
| 193 | } |
---|
| 194 | |
---|
| 195 | public void testFindAfterUpdatingContents() throws Exception { |
---|
| 196 | Text text = new Text("abcd"); |
---|
| 197 | text.set("a".getBytes()); |
---|
| 198 | assertEquals(text.getLength(),1); |
---|
| 199 | assertEquals(text.find("a"), 0); |
---|
| 200 | assertEquals(text.find("b"), -1); |
---|
| 201 | } |
---|
| 202 | |
---|
| 203 | public void testValidate() throws Exception { |
---|
| 204 | Text text = new Text("abcd\u20acbdcd\u20ac"); |
---|
| 205 | byte [] utf8 = text.getBytes(); |
---|
| 206 | int length = text.getLength(); |
---|
| 207 | Text.validateUTF8(utf8, 0, length); |
---|
| 208 | } |
---|
| 209 | |
---|
| 210 | public void testTextText() throws CharacterCodingException { |
---|
| 211 | Text a=new Text("abc"); |
---|
| 212 | Text b=new Text("a"); |
---|
| 213 | b.set(a); |
---|
| 214 | assertEquals("abc", b.toString()); |
---|
| 215 | a.append("xdefgxxx".getBytes(), 1, 4); |
---|
| 216 | assertEquals("modified aliased string", "abc", b.toString()); |
---|
| 217 | assertEquals("appended string incorrectly", "abcdefg", a.toString()); |
---|
| 218 | } |
---|
| 219 | |
---|
| 220 | private class ConcurrentEncodeDecodeThread extends Thread { |
---|
| 221 | public ConcurrentEncodeDecodeThread(String name) { |
---|
| 222 | super(name); |
---|
| 223 | } |
---|
| 224 | |
---|
| 225 | public void run() { |
---|
| 226 | String name = this.getName(); |
---|
| 227 | DataOutputBuffer out = new DataOutputBuffer(); |
---|
| 228 | DataInputBuffer in = new DataInputBuffer(); |
---|
| 229 | for (int i=0; i < 1000; ++i) { |
---|
| 230 | try { |
---|
| 231 | out.reset(); |
---|
| 232 | WritableUtils.writeString(out, name); |
---|
| 233 | |
---|
| 234 | in.reset(out.getData(), out.getLength()); |
---|
| 235 | String s = WritableUtils.readString(in); |
---|
| 236 | |
---|
| 237 | assertEquals(name, s); |
---|
| 238 | } catch (Exception ioe) { |
---|
| 239 | throw new RuntimeException(ioe); |
---|
| 240 | } |
---|
| 241 | } |
---|
| 242 | } |
---|
| 243 | } |
---|
| 244 | |
---|
| 245 | public void testConcurrentEncodeDecode() throws Exception{ |
---|
| 246 | Thread thread1 = new ConcurrentEncodeDecodeThread("apache"); |
---|
| 247 | Thread thread2 = new ConcurrentEncodeDecodeThread("hadoop"); |
---|
| 248 | |
---|
| 249 | thread1.start(); |
---|
| 250 | thread2.start(); |
---|
| 251 | |
---|
| 252 | thread2.join(); |
---|
| 253 | thread2.join(); |
---|
| 254 | } |
---|
| 255 | |
---|
| 256 | public static void main(String[] args) throws Exception |
---|
| 257 | { |
---|
| 258 | TestText test = new TestText("main"); |
---|
| 259 | test.testIO(); |
---|
| 260 | test.testCompare(); |
---|
| 261 | test.testCoding(); |
---|
| 262 | test.testWritable(); |
---|
| 263 | test.testFind(); |
---|
| 264 | test.testValidate(); |
---|
| 265 | } |
---|
| 266 | } |
---|