/**
* 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.util;
import java.util.ArrayList;
import java.util.List;
import junit.framework.TestCase;
import static org.junit.Assert.assertArrayEquals;
public class TestStringUtils extends TestCase {
final private static String NULL_STR = null;
final private static String EMPTY_STR = "";
final private static String STR_WO_SPECIAL_CHARS = "AB";
final private static String STR_WITH_COMMA = "A,B";
final private static String ESCAPED_STR_WITH_COMMA = "A\\,B";
final private static String STR_WITH_ESCAPE = "AB\\";
final private static String ESCAPED_STR_WITH_ESCAPE = "AB\\\\";
final private static String STR_WITH_BOTH2 = ",A\\,,B\\\\,";
final private static String ESCAPED_STR_WITH_BOTH2 =
"\\,A\\\\\\,\\,B\\\\\\\\\\,";
public void testEscapeString() throws Exception {
assertEquals(NULL_STR, StringUtils.escapeString(NULL_STR));
assertEquals(EMPTY_STR, StringUtils.escapeString(EMPTY_STR));
assertEquals(STR_WO_SPECIAL_CHARS,
StringUtils.escapeString(STR_WO_SPECIAL_CHARS));
assertEquals(ESCAPED_STR_WITH_COMMA,
StringUtils.escapeString(STR_WITH_COMMA));
assertEquals(ESCAPED_STR_WITH_ESCAPE,
StringUtils.escapeString(STR_WITH_ESCAPE));
assertEquals(ESCAPED_STR_WITH_BOTH2,
StringUtils.escapeString(STR_WITH_BOTH2));
}
public void testSplit() throws Exception {
assertEquals(NULL_STR, StringUtils.split(NULL_STR));
String[] splits = StringUtils.split(EMPTY_STR);
assertEquals(0, splits.length);
splits = StringUtils.split(",,");
assertEquals(0, splits.length);
splits = StringUtils.split(STR_WO_SPECIAL_CHARS);
assertEquals(1, splits.length);
assertEquals(STR_WO_SPECIAL_CHARS, splits[0]);
splits = StringUtils.split(STR_WITH_COMMA);
assertEquals(2, splits.length);
assertEquals("A", splits[0]);
assertEquals("B", splits[1]);
splits = StringUtils.split(ESCAPED_STR_WITH_COMMA);
assertEquals(1, splits.length);
assertEquals(ESCAPED_STR_WITH_COMMA, splits[0]);
splits = StringUtils.split(STR_WITH_ESCAPE);
assertEquals(1, splits.length);
assertEquals(STR_WITH_ESCAPE, splits[0]);
splits = StringUtils.split(STR_WITH_BOTH2);
assertEquals(3, splits.length);
assertEquals(EMPTY_STR, splits[0]);
assertEquals("A\\,", splits[1]);
assertEquals("B\\\\", splits[2]);
splits = StringUtils.split(ESCAPED_STR_WITH_BOTH2);
assertEquals(1, splits.length);
assertEquals(ESCAPED_STR_WITH_BOTH2, splits[0]);
}
public void testUnescapeString() throws Exception {
assertEquals(NULL_STR, StringUtils.unEscapeString(NULL_STR));
assertEquals(EMPTY_STR, StringUtils.unEscapeString(EMPTY_STR));
assertEquals(STR_WO_SPECIAL_CHARS,
StringUtils.unEscapeString(STR_WO_SPECIAL_CHARS));
try {
StringUtils.unEscapeString(STR_WITH_COMMA);
fail("Should throw IllegalArgumentException");
} catch (IllegalArgumentException e) {
// expected
}
assertEquals(STR_WITH_COMMA,
StringUtils.unEscapeString(ESCAPED_STR_WITH_COMMA));
try {
StringUtils.unEscapeString(STR_WITH_ESCAPE);
fail("Should throw IllegalArgumentException");
} catch (IllegalArgumentException e) {
// expected
}
assertEquals(STR_WITH_ESCAPE,
StringUtils.unEscapeString(ESCAPED_STR_WITH_ESCAPE));
try {
StringUtils.unEscapeString(STR_WITH_BOTH2);
fail("Should throw IllegalArgumentException");
} catch (IllegalArgumentException e) {
// expected
}
assertEquals(STR_WITH_BOTH2,
StringUtils.unEscapeString(ESCAPED_STR_WITH_BOTH2));
}
public void testTraditionalBinaryPrefix() throws Exception {
String[] symbol = {"k", "m", "g", "t", "p", "e"};
long m = 1024;
for(String s : symbol) {
assertEquals(0, StringUtils.TraditionalBinaryPrefix.string2long(0 + s));
assertEquals(m, StringUtils.TraditionalBinaryPrefix.string2long(1 + s));
m *= 1024;
}
assertEquals(0L, StringUtils.TraditionalBinaryPrefix.string2long("0"));
assertEquals(-1259520L, StringUtils.TraditionalBinaryPrefix.string2long("-1230k"));
assertEquals(956703965184L, StringUtils.TraditionalBinaryPrefix.string2long("891g"));
}
public void testGetTrimmedStrings() throws Exception {
String compactDirList = "/spindle1/hdfs,/spindle2/hdfs,/spindle3/hdfs";
String spacedDirList = "/spindle1/hdfs, /spindle2/hdfs, /spindle3/hdfs";
String pathologicalDirList1 = " /spindle1/hdfs , /spindle2/hdfs ,/spindle3/hdfs ";
String pathologicalDirList2 = " /spindle1/hdfs , /spindle2/hdfs ,/spindle3/hdfs , ";
String emptyList1 = "";
String emptyList2 = " ";
String[] expectedArray = {"/spindle1/hdfs", "/spindle2/hdfs", "/spindle3/hdfs"};
String[] emptyArray = {};
assertArrayEquals(expectedArray, StringUtils.getTrimmedStrings(compactDirList));
assertArrayEquals(expectedArray, StringUtils.getTrimmedStrings(spacedDirList));
assertArrayEquals(expectedArray, StringUtils.getTrimmedStrings(pathologicalDirList1));
assertArrayEquals(expectedArray, StringUtils.getTrimmedStrings(pathologicalDirList2));
assertArrayEquals(emptyArray, StringUtils.getTrimmedStrings(emptyList1));
assertArrayEquals(emptyArray, StringUtils.getTrimmedStrings(emptyList2));
}
public void testJoin() {
List<String> s = new ArrayList<String>();
s.add("a");
s.add("b");
s.add("c");
assertEquals("", StringUtils.join(":", s.subList(0, 0)));
assertEquals("a", StringUtils.join(":", s.subList(0, 1)));
assertEquals("a:b", StringUtils.join(":", s.subList(0, 2)));
assertEquals("a:b:c", StringUtils.join(":", s.subList(0, 3)));
}
}