stringutilstests.java

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/*
 * Copyright 2002-2006 the original author or authors.
 *
 * Licensed 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.springframework.util;

import java.util.Arrays;
import java.util.Locale;
import java.util.Properties;

import junit.framework.TestCase;

/**
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @author Rick Evans
 */
public class StringUtilsTests extends TestCase {

	public void testHasTextBlank() throws Exception {
		String blank = "          ";
		assertEquals(false, StringUtils.hasText(blank));
	}

	public void testHasTextNullEmpty() throws Exception {
		assertEquals(false, StringUtils.hasText(null));
		assertEquals(false, StringUtils.hasText(""));
	}

	public void testHasTextValid() throws Exception {
		assertEquals(true, StringUtils.hasText("t"));
	}

	public void testTrimWhitespace() throws Exception {
		assertEquals("", StringUtils.trimWhitespace(""));
		assertEquals("", StringUtils.trimWhitespace(" "));
		assertEquals("", StringUtils.trimWhitespace("\t"));
		assertEquals("a", StringUtils.trimWhitespace(" a"));
		assertEquals("a", StringUtils.trimWhitespace("a "));
		assertEquals("a", StringUtils.trimWhitespace(" a "));
		assertEquals("a b", StringUtils.trimWhitespace(" a b "));
		assertEquals("a b  c", StringUtils.trimWhitespace(" a b  c "));
	}

	public void testTrimLeadingWhitespace() throws Exception {
		assertEquals("", StringUtils.trimLeadingWhitespace(""));
		assertEquals("", StringUtils.trimLeadingWhitespace(" "));
		assertEquals("", StringUtils.trimLeadingWhitespace("\t"));
		assertEquals("a", StringUtils.trimLeadingWhitespace(" a"));
		assertEquals("a ", StringUtils.trimLeadingWhitespace("a "));
		assertEquals("a ", StringUtils.trimLeadingWhitespace(" a "));
		assertEquals("a b ", StringUtils.trimLeadingWhitespace(" a b "));
		assertEquals("a b  c ", StringUtils.trimLeadingWhitespace(" a b  c "));
	}

	public void testTrimTrailingWhitespace() throws Exception {
		assertEquals("", StringUtils.trimTrailingWhitespace(""));
		assertEquals("", StringUtils.trimTrailingWhitespace(" "));
		assertEquals("", StringUtils.trimTrailingWhitespace("\t"));
		assertEquals("a", StringUtils.trimTrailingWhitespace("a "));
		assertEquals(" a", StringUtils.trimTrailingWhitespace(" a"));
		assertEquals(" a", StringUtils.trimTrailingWhitespace(" a "));
		assertEquals(" a b", StringUtils.trimTrailingWhitespace(" a b "));
		assertEquals(" a b  c", StringUtils.trimTrailingWhitespace(" a b  c "));
	}

	public void testTrimAllWhitespace() throws Exception {
		assertEquals("", StringUtils.trimAllWhitespace(""));
		assertEquals("", StringUtils.trimAllWhitespace(" "));
		assertEquals("", StringUtils.trimAllWhitespace("\t"));
		assertEquals("a", StringUtils.trimAllWhitespace(" a"));
		assertEquals("a", StringUtils.trimAllWhitespace("a "));
		assertEquals("a", StringUtils.trimAllWhitespace(" a "));
		assertEquals("ab", StringUtils.trimAllWhitespace(" a b "));
		assertEquals("abc", StringUtils.trimAllWhitespace(" a b  c "));
	}

	public void testCountOccurrencesOf() {
		assertTrue("nullx2 = 0",
				StringUtils.countOccurrencesOf(null, null) == 0);
		assertTrue("null string = 0",
				StringUtils.countOccurrencesOf("s", null) == 0);
		assertTrue("null substring = 0",
				StringUtils.countOccurrencesOf(null, "s") == 0);
		String s = "erowoiueoiur";
		assertTrue("not found = 0",
				StringUtils.countOccurrencesOf(s, "WERWER") == 0);
		assertTrue("not found char = 0",
				StringUtils.countOccurrencesOf(s, "x") == 0);
		assertTrue("not found ws = 0",
				StringUtils.countOccurrencesOf(s, " ") == 0);
		assertTrue("not found empty string = 0",
				StringUtils.countOccurrencesOf(s, "") == 0);
		assertTrue("found char=2", StringUtils.countOccurrencesOf(s, "e") == 2);
		assertTrue("found substring=2",
				StringUtils.countOccurrencesOf(s, "oi") == 2);
		assertTrue("found substring=2",
				StringUtils.countOccurrencesOf(s, "oiu") == 2);
		assertTrue("found substring=3",
				StringUtils.countOccurrencesOf(s, "oiur") == 1);
		assertTrue("test last", StringUtils.countOccurrencesOf(s, "r") == 2);
	}

	public void testReplace() throws Exception {
		String inString = "a6AazAaa77abaa";
		String oldPattern = "aa";
		String newPattern = "foo";

		// Simple replace
		String s = StringUtils.replace(inString, oldPattern, newPattern);
		assertTrue("Replace 1 worked", s.equals("a6AazAfoo77abfoo"));

		// Non match: no change
		s = StringUtils.replace(inString, "qwoeiruqopwieurpoqwieur", newPattern);
		assertTrue("Replace non matched is equal", s.equals(inString));

		// Null new pattern: should ignore
		s = StringUtils.replace(inString, oldPattern, null);
		assertTrue("Replace non matched is equal", s.equals(inString));

		// Null old pattern: should ignore
		s = StringUtils.replace(inString, null, newPattern);
		assertTrue("Replace non matched is equal", s.equals(inString));
	}

	public void testDelete() throws Exception {
		String inString = "The quick brown fox jumped over the lazy dog";

		String noThe = StringUtils.delete(inString, "the");
		assertTrue("Result has no the [" + noThe + "]",
				noThe.equals("The quick brown fox jumped over  lazy dog"));

		String nohe = StringUtils.delete(inString, "he");
		assertTrue("Result has no he [" + nohe + "]",
				nohe.equals("T quick brown fox jumped over t lazy dog"));

		String nosp = StringUtils.delete(inString, " ");
		assertTrue("Result has no spaces",
				nosp.equals("Thequickbrownfoxjumpedoverthelazydog"));

		String killEnd = StringUtils.delete(inString, "dog");
		assertTrue("Result has no dog",
				killEnd.equals("The quick brown fox jumped over the lazy "));

		String mismatch = StringUtils.delete(inString, "dxxcxcxog");
		assertTrue("Result is unchanged", mismatch.equals(inString));
	}

	public void testDeleteAny() throws Exception {
		String inString = "Able was I ere I saw Elba";

		String res = StringUtils.deleteAny(inString, "I");
		assertTrue("Result has no Is [" + res + "]",
				res.equals("Able was  ere  saw Elba"));

		res = StringUtils.deleteAny(inString, "AeEba!");
		assertTrue("Result has no Is [" + res + "]",
				res.equals("l ws I r I sw l"));

		String mismatch = StringUtils.deleteAny(inString, "#@$#$^");
		assertTrue("Result is unchanged", mismatch.equals(inString));

		String whitespace =
				"This is\n\n\n    \t   a messagy string with whitespace\n";
		assertTrue("Has CR", whitespace.indexOf("\n") != -1);
		assertTrue("Has tab", whitespace.indexOf("\t") != -1);
		assertTrue("Has  sp", whitespace.indexOf(" ") != -1);
		String cleaned = StringUtils.deleteAny(whitespace, "\n\t ");
		assertTrue("Has no CR", cleaned.indexOf("\n") == -1);
		assertTrue("Has no tab", cleaned.indexOf("\t") == -1);
		assertTrue("Has no sp", cleaned.indexOf(" ") == -1);
		assertTrue("Still has chars", cleaned.length() > 10);
	}


	public void testQuote() {
		assertEquals("'myString'", StringUtils.quote("myString"));
		assertEquals("''", StringUtils.quote(""));
		assertNull(StringUtils.quote(null));
	}

	public void testQuoteIfString() {
		assertEquals("'myString'", StringUtils.quoteIfString("myString"));
		assertEquals("''", StringUtils.quoteIfString(""));
		assertEquals(new Integer(5), StringUtils.quoteIfString(new Integer(5)));
		assertNull(StringUtils.quoteIfString(null));
	}

	public void testUnqualify() {
		String qualified = "i.am.not.unqualified";
		assertEquals("unqualified", StringUtils.unqualify(qualified));
	}

	public void testCapitalize() {
		String capitalized = "i am not capitalized";
		assertEquals("I am not capitalized", StringUtils.capitalize(capitalized));
	}

	public void testUncapitalize() {
		String capitalized = "I am capitalized";
		assertEquals("i am capitalized", StringUtils.uncapitalize(capitalized));
	}

	public void testGetFilename() {
		assertEquals(null, StringUtils.getFilename(null));
		assertEquals("", StringUtils.getFilename(""));
		assertEquals("myfile", StringUtils.getFilename("myfile"));
		assertEquals("myfile", StringUtils.getFilename("mypath/myfile"));
		assertEquals("myfile.", StringUtils.getFilename("myfile."));
		assertEquals("myfile.", StringUtils.getFilename("mypath/myfile."));
		assertEquals("myfile.txt", StringUtils.getFilename("myfile.txt"));
		assertEquals("myfile.txt", StringUtils.getFilename("mypath/myfile.txt"));
	}

	public void testGetFilenameExtension() {
		assertEquals(null, StringUtils.getFilenameExtension(null));
		assertEquals(null, StringUtils.getFilenameExtension(""));
		assertEquals(null, StringUtils.getFilenameExtension("myfile"));
		assertEquals(null, StringUtils.getFilenameExtension("myPath/myfile"));
		assertEquals("", StringUtils.getFilenameExtension("myfile."));
		assertEquals("", StringUtils.getFilenameExtension("myPath/myfile."));
		assertEquals("txt", StringUtils.getFilenameExtension("myfile.txt"));
		assertEquals("txt", StringUtils.getFilenameExtension("mypath/myfile.txt"));
	}

	public void testStripFilenameExtension() {
		assertEquals(null, StringUtils.stripFilenameExtension(null));
		assertEquals("", StringUtils.stripFilenameExtension(""));
		assertEquals("myfile", StringUtils.stripFilenameExtension("myfile"));
		assertEquals("mypath/myfile", StringUtils.stripFilenameExtension("mypath/myfile"));
		assertEquals("myfile", StringUtils.stripFilenameExtension("myfile."));
		assertEquals("mypath/myfile", StringUtils.stripFilenameExtension("mypath/myfile."));
		assertEquals("myfile", StringUtils.stripFilenameExtension("myfile.txt"));
		assertEquals("mypath/myfile", StringUtils.stripFilenameExtension("mypath/myfile.txt"));
	}

	public void testCleanPath() {
		assertEquals("mypath/myfile", StringUtils.cleanPath("mypath/myfile"));
		assertEquals("mypath/myfile", StringUtils.cleanPath("mypath\\myfile"));
		assertEquals("mypath/myfile", StringUtils.cleanPath("mypath/../mypath/myfile"));
		assertEquals("mypath/myfile", StringUtils.cleanPath("mypath/myfile/../../mypath/myfile"));
		assertEquals("../mypath/myfile", StringUtils.cleanPath("../mypath/myfile"));
		assertEquals("../mypath/myfile", StringUtils.cleanPath("../mypath/../mypath/myfile"));
		assertEquals("../mypath/myfile", StringUtils.cleanPath("mypath/../../mypath/myfile"));
	}

	public void testPathEquals() {
		assertTrue("Must be true for the same strings",
				StringUtils.pathEquals("/dummy1/dummy2/dummy3",
						"/dummy1/dummy2/dummy3"));
		assertTrue("Must be true for the same win strings",