/*******************************************************************************
 * Copyright (c) 2005, 2007 Oracle. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0, which accompanies this distribution
 * and is available at http://www.eclipse.org/legal/epl-v10.html.
 * 
 * Contributors:
 *     Oracle - initial API and implementation
 ******************************************************************************/
package org.eclipse.jpt.utility.tests.internal;

import java.io.StringWriter;
import java.io.Writer;
import junit.framework.TestCase;
import org.eclipse.jpt.utility.internal.StringTools;

public class StringToolsTests extends TestCase {

	public StringToolsTests(String name) {
		super(name);
	}

	// ********** padding/truncating **********

	public void testPad() {
		assertEquals("fred", StringTools.pad("fred", 4));
		assertEquals("fred  ", StringTools.pad("fred", 6));
		boolean exThrown = false;
		try {
			assertEquals("fr", StringTools.pad("fred", 2));
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testPadCharArray() {
		assertEquals("fred", new String(StringTools.pad(new char[] { 'f', 'r', 'e', 'd' }, 4)));
		assertEquals("fred  ", new String(StringTools.pad(new char[] { 'f', 'r', 'e', 'd' }, 6)));
		boolean exThrown = false;
		try {
			assertEquals("fr", new String(StringTools.pad(new char[] { 'f', 'r', 'e', 'd' }, 2)));
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testPadOnWriter() {
		Writer writer;
		writer = new StringWriter();
		StringTools.padOn("fred", 4, writer);
		assertEquals("fred", writer.toString());

		writer = new StringWriter();
		StringTools.padOn("fred", 6, writer);
		assertEquals("fred  ", writer.toString());

		writer = new StringWriter();
		boolean exThrown = false;
		try {
			StringTools.padOn("fred", 2, writer);
			fail();
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testPadOnStringBuffer() {
		StringBuffer sb;
		sb = new StringBuffer();
		StringTools.padOn("fred", 4, sb);
		assertEquals("fred", sb.toString());

		sb = new StringBuffer();
		StringTools.padOn("fred", 6, sb);
		assertEquals("fred  ", sb.toString());

		sb = new StringBuffer();
		boolean exThrown = false;
		try {
			StringTools.padOn("fred", 2, sb);
			fail();
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testPadOrTruncate() {
		assertEquals("fred", StringTools.padOrTruncate("fred", 4));
		assertEquals("fred  ", StringTools.padOrTruncate("fred", 6));
		assertEquals("fr", StringTools.padOrTruncate("fred", 2));
	}

	public void testPadOrTruncateCharArray() {
		assertEquals("fred", new String(StringTools.padOrTruncate(new char[] { 'f', 'r', 'e', 'd' }, 4)));
		assertEquals("fred  ", new String(StringTools.padOrTruncate(new char[] { 'f', 'r', 'e', 'd' }, 6)));
		assertEquals("fr", new String(StringTools.padOrTruncate(new char[] { 'f', 'r', 'e', 'd' }, 2)));
	}

	public void testPadOrTruncateOnWriter() {
		this.verifyPadOrTruncateOnWriter("fred", "fred", 4);
		this.verifyPadOrTruncateOnWriter("fred  ", "fred", 6);
		this.verifyPadOrTruncateOnWriter("fr", "fred", 2);
	}

	private void verifyPadOrTruncateOnWriter(String expected, String string, int length) {
		Writer writer = new StringWriter();
		StringTools.padOrTruncateOn(string, length, writer);
		assertEquals(expected, writer.toString());
	}

	public void testPadOrTruncateOnStringBuffer() {
		this.verifyPadOrTruncateOnStringBuffer("fred", "fred", 4);
		this.verifyPadOrTruncateOnStringBuffer("fred  ", "fred", 6);
		this.verifyPadOrTruncateOnStringBuffer("fr", "fred", 2);
	}

	private void verifyPadOrTruncateOnStringBuffer(String expected, String string, int length) {
		StringBuffer sb = new StringBuffer();
		StringTools.padOrTruncateOn(string, length, sb);
		assertEquals(expected, sb.toString());
	}

	public void testZeroPad() {
		assertEquals("1234", StringTools.zeroPad("1234", 4));
		assertEquals("001234", StringTools.zeroPad("1234", 6));
		boolean exThrown = false;
		try {
			assertEquals("12", StringTools.zeroPad("1234", 2));
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testZeroPadCharArray() {
		assertEquals("1234", new String(StringTools.zeroPad(new char[] { '1', '2', '3', '4' }, 4)));
		assertEquals("001234", new String(StringTools.zeroPad(new char[] { '1', '2', '3', '4' }, 6)));
		boolean exThrown = false;
		try {
			assertEquals("12", new String(StringTools.zeroPad(new char[] { '1', '2', '3', '4' }, 2)));
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testZeroPadOnWriter() {
		Writer writer;
		writer = new StringWriter();
		StringTools.zeroPadOn("1234", 4, writer);
		assertEquals("1234", writer.toString());

		writer = new StringWriter();
		StringTools.zeroPadOn("1234", 6, writer);
		assertEquals("001234", writer.toString());

		writer = new StringWriter();
		boolean exThrown = false;
		try {
			StringTools.zeroPadOn("1234", 2, writer);
			fail();
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testZeroPadOnStringBuffer() {
		StringBuffer sb;
		sb = new StringBuffer();
		StringTools.zeroPadOn("1234", 4, sb);
		assertEquals("1234", sb.toString());

		sb = new StringBuffer();
		StringTools.zeroPadOn("1234", 6, sb);
		assertEquals("001234", sb.toString());

		sb = new StringBuffer();
		boolean exThrown = false;
		try {
			StringTools.zeroPadOn("1234", 2, sb);
			fail();
		} catch (IllegalArgumentException ex) {
			exThrown = true;
		}
		assertTrue(exThrown);
	}

	public void testZeroPadOrTruncate() {
		assertEquals("1234", StringTools.zeroPadOrTruncate("1234", 4));
		assertEquals("001234", StringTools.zeroPadOrTruncate("1234", 6));
		assertEquals("34", StringTools.zeroPadOrTruncate("1234", 2));
	}

	public void testZeroPadOrTruncateCharArray() {
		assertEquals("1234", new String(StringTools.zeroPadOrTruncate(new char[] { '1', '2', '3', '4' }, 4)));
		assertEquals("001234", new String(StringTools.zeroPadOrTruncate(new char[] { '1', '2', '3', '4' }, 6)));
		assertEquals("34", new String(StringTools.zeroPadOrTruncate(new char[] { '1', '2', '3', '4' }, 2)));
	}

	public void testZeroPadOrTruncateOnWriter() {
		this.verifyZeroPadOrTruncateOnWriter("1234", "1234", 4);
		this.verifyZeroPadOrTruncateOnWriter("001234", "1234", 6);
		this.verifyZeroPadOrTruncateOnWriter("34", "1234", 2);
	}

	private void verifyZeroPadOrTruncateOnWriter(String expected, String string, int length) {
		Writer writer = new StringWriter();
		StringTools.zeroPadOrTruncateOn(string, length, writer);
		assertEquals(expected, writer.toString());
	}

	public void testZeroPadOrTruncateOnStringBuffer() {
		this.verifyZeroPadOrTruncateOnStringBuffer("1234", "1234", 4);
		this.verifyZeroPadOrTruncateOnStringBuffer("001234", "1234", 6);
		this.verifyZeroPadOrTruncateOnStringBuffer("34", "1234", 2);
	}

	private void verifyZeroPadOrTruncateOnStringBuffer(String expected, String string, int length) {
		StringBuffer sb = new StringBuffer();
		StringTools.zeroPadOrTruncateOn(string, length, sb);
		assertEquals(expected, sb.toString());
	}

	// ********** removing characters **********

	public void testRemoveFirstOccurrence() {
		this.verifyRemoveFirstOccurrence("Emplo&yee", '&', "Employee");
		this.verifyRemoveFirstOccurrence("Emplo&yee&", '&', "Employee&");
		this.verifyRemoveFirstOccurrence("Employee &Foo", '&', "Employee Foo");
		this.verifyRemoveFirstOccurrence("Employee&", '&', "Employee");
		this.verifyRemoveFirstOccurrence("&Employee", '&', "Employee");
	}

	private void verifyRemoveFirstOccurrence(String string, char charToRemove, String expectedString) {
		assertEquals(expectedString, StringTools.removeFirstOccurrence(string, charToRemove));
	}

	public void testRemoveFirstOccurrenceCharArray() {
		this.verifyRemoveFirstOccurrenceCharArray("Emplo&yee", '&', "Employee");
		this.verifyRemoveFirstOccurrenceCharArray("Emplo&yee&", '&', "Employee&");
		this.verifyRemoveFirstOccurrenceCharArray("Employee &Foo", '&', "Employee Foo");
		this.verifyRemoveFirstOccurrenceCharArray("Employee&", '&', "Employee");
		this.verifyRemoveFirstOccurrenceCharArray("&Employee", '&', "Employee");
	}

	private void verifyRemoveFirstOccurrenceCharArray(String string, char charToRemove, String expectedString) {
		assertEquals(expectedString, new String(StringTools.removeFirstOccurrence(string.toCharArray(), charToRemove)));
	}

	public void testRemoveFirstOccurrenceOnWriter() {
		this.verifyRemoveFirstOccurrenceOnWriter("Emplo&yee", '&', "Employee");
		this.verifyRemoveFirstOccurrenceOnWriter("Emplo&yee&", '&', "Employee&");
		this.verifyRemoveFirstOccurrenceOnWriter("Employee &Foo", '&', "Employee Foo");
		this.verifyRemoveFirstOccurrenceOnWriter("Employee&", '&', "Employee");
		this.verifyRemoveFirstOccurrenceOnWriter("&Employee", '&', "Employee");
	}

	private void verifyRemoveFirstOccurrenceOnWriter(String string, char charToRemove, String expectedString) {
		Writer writer = new StringWriter();
		StringTools.removeFirstOccurrenceOn(string, charToRemove, writer);
		assertEquals(expectedString, writer.toString());
	}

	public void testRemoveFirstOccurrenceOnStringBuffer() {
		this.verifyRemoveFirstOccurrenceOnStringBuffer("Emplo&yee", '&', "Employee");
		this.verifyRemoveFirstOccurrenceOnStringBuffer("Emplo&yee&", '&', "Employee&");
		this.verifyRemoveFirstOccurrenceOnStringBuffer("Employee &Foo", '&', "Employee Foo");
		this.verifyRemoveFirstOccurrenceOnStringBuffer("Employee&", '&', "Employee");
		this.verifyRemoveFirstOccurrenceOnStringBuffer("&Employee", '&', "Employee");
	}

	private void verifyRemoveFirstOccurrenceOnStringBuffer(String string, char charToRemove, String expectedString) {
		StringBuffer sb = new StringBuffer();
		StringTools.removeFirstOccurrenceOn(string, charToRemove, sb);
		assertEquals(expectedString, sb.toString());
	}

	public void testRemoveAllOccurrences() {
		this.verifyRemoveAllOccurrences("Employee Fred", ' ', "EmployeeFred");
		this.verifyRemoveAllOccurrences(" Employee ", ' ', "Employee");
		this.verifyRemoveAllOccurrences("Employee   Foo", ' ', "EmployeeFoo");
		this.verifyRemoveAllOccurrences(" Emp loyee   Foo", ' ', "EmployeeFoo");
	}

	private void verifyRemoveAllOccurrences(String string, char charToRemove, String expectedString) {
		assertEquals(expectedString, StringTools.removeAllOccurrences(string, charToRemove));
	}

	public void testRemoveAllOccurrencesCharArray() {
		this.verifyRemoveAllOccurrencesCharArray("Employee Fred", ' ', "EmployeeFred");
		this.verifyRemoveAllOccurrencesCharArray(" Employee ", ' ', "Employee");
		this.verifyRemoveAllOccurrencesCharArray("Employee   Foo", ' ', "EmployeeFoo");
		this.verifyRemoveAllOccurrencesCharArray(" Emp loyee   Foo", ' ', "EmployeeFoo");
	}

	private void verifyRemoveAllOccurrencesCharArray(String string, char charToRemove, String expectedString) {
		assertEquals(expectedString, new String(StringTools.removeAllOccurrences(string.toCharArray(), charToRemove)));
	}

	public void testRemoveAllOccurrencesOnWriter() {
		this.verifyRemoveAllOccurrencesOnWriter("Employee Fred", ' ', "EmployeeFred");
		this.verifyRemoveAllOccurrencesOnWriter(" Employee ", ' ', "Employee");
		this.verifyRemoveAllOccurrencesOnWriter("Employee   Foo", ' ', "EmployeeFoo");
		this.verifyRemoveAllOccurrencesOnWriter(" Emp loyee   Foo", ' ', "EmployeeFoo");
	}

	private void verifyRemoveAllOccurrencesOnWriter(String string, char charToRemove, String expectedString) {
		Writer writer = new StringWriter();
		StringTools.removeAllOccurrencesOn(string, charToRemove, writer);
		assertEquals(expectedString, writer.toString());
	}

	public void testRemoveAllOccurrencesOnStringBuffer() {
		this.verifyRemoveAllOccurrencesOnStringBuffer("Employee Fred", ' ', "EmployeeFred");
		this.verifyRemoveAllOccurrencesOnStringBuffer(" Employee ", ' ', "Employee");
		this.verifyRemoveAllOccurrencesOnStringBuffer("Employee   Foo", ' ', "EmployeeFoo");
		this.verifyRemoveAllOccurrencesOnStringBuffer(" Emp loyee   Foo", ' ', "EmployeeFoo");
	}

	private void verifyRemoveAllOccurrencesOnStringBuffer(String string, char charToRemove, String expectedString) {
		StringBuffer sb = new StringBuffer();
		StringTools.removeAllOccurrencesOn(string, charToRemove, sb);
		assertEquals(expectedString, sb.toString());
	}

	// ********** common prefix **********

	public void testCommonPrefixLength() {
		assertEquals(3, StringTools.commonPrefixLength("fooZZZ", "fooBBB"));
		assertEquals(3, StringTools.commonPrefixLength("foo", "fooBBB"));
		assertEquals(3, StringTools.commonPrefixLength("fooZZZ", "foo"));
		assertEquals(3, StringTools.commonPrefixLength("foo", "foo"));
	}

	// ********** capitalization **********

	public void testCapitalizeCharArray() {
		this.verifyCapitalizeCharArray("Oracle", new char[] { 'O', 'r', 'a', 'c', 'l', 'e' });
		this.verifyCapitalizeCharArray("Oracle", new char[] { 'o', 'r', 'a', 'c', 'l', 'e' });
		this.verifyCapitalizeCharArray("   ", new char[] { ' ', ' ', ' ' });
		this.verifyCapitalizeCharArray("ORACLE", new char[] { 'O', 'R', 'A', 'C', 'L', 'E' });
		this.verifyCapitalizeCharArray("", new char[0]);
		this.verifyCapitalizeCharArray("A", new char[] { 'a' });
		this.verifyCapitalizeCharArray("\u00C9cole", new char[] { '\u00E9', 'c', 'o', 'l', 'e' });
	}

	private void verifyCapitalizeCharArray(String expected, char[] string) {
		assertEquals(expected, new String(StringTools.capitalize(string)));
	}

	public void testCapitalizeString() {
		this.verifyCapitalizeString("Oracle", "Oracle");
		this.verifyCapitalizeString("Oracle", "oracle");
		this.verifyCapitalizeString("   ", "   ");
		this.verifyCapitalizeString("ORACLE", "ORACLE");
		this.verifyCapitalizeString("", "");
		this.verifyCapitalizeString("A", "a");
		this.verifyCapitalizeString("\u00C9cole", "\u00E9cole"); // �cole->�COLE
	}

	private void verifyCapitalizeString(String expected, String string) {
		assertEquals(expected, StringTools.capitalize(string));
	}

	public void testCapitalizeOnCharArrayStringBuffer() {
		this.verifyCapitalizeOnCharArrayStringBuffer("Oracle", new char[] { 'O', 'r', 'a', 'c', 'l', 'e' });
		this.verifyCapitalizeOnCharArrayStringBuffer("Oracle", new char[] { 'o', 'r', 'a', 'c', 'l', 'e' });
		this.verifyCapitalizeOnCharArrayStringBuffer("   ", new char[] { ' ', ' ', ' ' });
		this.verifyCapitalizeOnCharArrayStringBuffer("ORACLE", new char[] { 'O', 'R', 'A', 'C', 'L', 'E' });
		this.verifyCapitalizeOnCharArrayStringBuffer("", new char[0]);
		this.verifyCapitalizeOnCharArrayStringBuffer("A", new char[] { 'a' });
		this.verifyCapitalizeOnCharArrayStringBuffer("\u00C9cole", new char[] { '\u00E9', 'c', 'o', 'l', 'e' });
	}

	private void verifyCapitalizeOnCharArrayStringBuffer(String expected, char[] string) {
		StringBuffer sb = new StringBuffer();
		StringTools.capitalizeOn(string, sb);
		assertEquals(expected, sb.toString());
	}

	public void testCapitalizeOnStringStringBuffer() {
		this.verifyCapitalizeOnStringStringBuffer("Oracle", "Oracle");
		this.verifyCapitalizeOnStringStringBuffer("Oracle", "oracle");
		this.verifyCapitalizeOnStringStringBuffer("   ", "   ");
		this.verifyCapitalizeOnStringStringBuffer("ORACLE", "ORACLE");
		this.verifyCapitalizeOnStringStringBuffer("", "");
		this.verifyCapitalizeOnStringStringBuffer("A", "a");
		this.verifyCapitalizeOnStringStringBuffer("\u00C9cole", "\u00E9cole"); // �cole->�COLE
	}

	private void verifyCapitalizeOnStringStringBuffer(String expected, String string) {
		StringBuffer sb = new StringBuffer();
		StringTools.capitalizeOn(string, sb);
		assertEquals(expected, sb.toString());
	}

	public void testCapitalizeOnCharArrayWriter() {
		this.verifyCapitalizeOnCharArrayWriter("Oracle", new char[] { 'O', 'r', 'a', 'c', 'l', 'e' });
		this.verifyCapitalizeOnCharArrayWriter("Oracle", new char[] { 'o', 'r', 'a', 'c', 'l', 'e' });
		this.verifyCapitalizeOnCharArrayWriter("   ", new char[] { ' ', ' ', ' ' });
		this.verifyCapitalizeOnCharArrayWriter("ORACLE", new char[] { 'O', 'R', 'A', 'C', 'L', 'E' });
		this.verifyCapitalizeOnCharArrayWriter("", new char[0]);
		this.verifyCapitalizeOnCharArrayWriter("A", new char[] { 'a' });
		this.verifyCapitalizeOnCharArrayWriter("\u00C9cole", new char[] { '\u00E9', 'c', 'o', 'l', 'e' });
	}

	private void verifyCapitalizeOnCharArrayWriter(String expected, char[] string) {
		Writer writer = new StringWriter();
		StringTools.capitalizeOn(string, writer);
		assertEquals(expected, writer.toString());
	}

	public void testCapitalizeOnStringWriter() {
		this.verifyCapitalizeOnStringWriter("Oracle", "Oracle");
		this.verifyCapitalizeOnStringWriter("Oracle", "oracle");
		this.verifyCapitalizeOnStringWriter("   ", "   ");
		this.verifyCapitalizeOnStringWriter("ORACLE", "ORACLE");
		this.verifyCapitalizeOnStringWriter("", "");
		this.verifyCapitalizeOnStringWriter("A", "a");
		this.verifyCapitalizeOnStringWriter("\u00C9cole", "\u00E9cole"); // �cole->�COLE
	}

	private void verifyCapitalizeOnStringWriter(String expected, String string) {
		Writer writer = new StringWriter();
		StringTools.capitalizeOn(string, writer);
		assertEquals(expected, writer.toString());
	}

	public void testUnapitalizeCharArray() {
		this.verifyUncapitalizeCharArray("oracle", new char[] { 'O', 'r', 'a', 'c', 'l', 'e' });
		this.verifyUncapitalizeCharArray("oracle", new char[] { 'o', 'r', 'a', 'c', 'l', 'e' });
		this.verifyUncapitalizeCharArray("   ", new char[] { ' ', ' ', ' ' });
		this.verifyUncapitalizeCharArray("ORACLE", new char[] { 'O', 'R', 'A', 'C', 'L', 'E' });
		this.verifyUncapitalizeCharArray("", new char[0]);
		this.verifyUncapitalizeCharArray("a", new char[] { 'A' });
		this.verifyUncapitalizeCharArray("\u00E9cole", new char[] { '\u00C9', 'c', 'o', 'l', 'e' });
	}

	private void verifyUncapitalizeCharArray(String expected, char[] string) {
		assertEquals(expected, new String(StringTools.uncapitalize(string)));
	}

	public void testUncapitalizeString() {
		this.verifyUncapitalizeString("oracle", "Oracle");
		this.verifyUncapitalizeString("oracle", "oracle");
		this.verifyUncapitalizeString("   ", "   ");
		this.verifyUncapitalizeString("ORACLE", "ORACLE");
		this.verifyUncapitalizeString("", "");
		this.verifyUncapitalizeString("a", "A");
		this.verifyUncapitalizeString("\u00E9cole", "\u00C9cole"); // �cole->�COLE
	}

	private void verifyUncapitalizeString(String expected, String string) {
		assertEquals(expected, StringTools.uncapitalize(string));
	}

	public void testUncapitalizeOnCharArrayStringBuffer() {
		this.verifyUncapitalizeOnCharArrayStringBuffer("oracle", new char[] { 'O', 'r', 'a', 'c', 'l', 'e' });
		this.verifyUncapitalizeOnCharArrayStringBuffer("oracle", new char[] { 'o', 'r', 'a', 'c', 'l', 'e' });
		this.verifyUncapitalizeOnCharArrayStringBuffer("   ", new char[] { ' ', ' ', ' ' });
		this.verifyUncapitalizeOnCharArrayStringBuffer("ORACLE", new char[] { 'O', 'R', 'A', 'C', 'L', 'E' });
		this.verifyUncapitalizeOnCharArrayStringBuffer("", new char[0]);
		this.verifyUncapitalizeOnCharArrayStringBuffer("a", new char[] { 'A' });
		this.verifyUncapitalizeOnCharArrayStringBuffer("\u00E9cole", new char[] { '\u00C9', 'c', 'o', 'l', 'e' });
	}

	private void verifyUncapitalizeOnCharArrayStringBuffer(String expected, char[] string) {
		StringBuffer sb = new StringBuffer();
		StringTools.uncapitalizeOn(string, sb);
		assertEquals(expected, sb.toString());
	}

	public void testUncapitalizeOnStringStringBuffer() {
		this.verifyUncapitalizeOnStringStringBuffer("oracle", "Oracle");
		this.verifyUncapitalizeOnStringStringBuffer("oracle", "oracle");
		this.verifyUncapitalizeOnStringStringBuffer("   ", "   ");
		this.verifyUncapitalizeOnStringStringBuffer("ORACLE", "ORACLE");
		this.verifyUncapitalizeOnStringStringBuffer("", "");
		this.verifyUncapitalizeOnStringStringBuffer("a", "A");
		this.verifyUncapitalizeOnStringStringBuffer("\u00E9cole", "\u00C9cole"); // �cole->�COLE
	}

	private void verifyUncapitalizeOnStringStringBuffer(String expected, String string) {
		StringBuffer sb = new StringBuffer();
		StringTools.uncapitalizeOn(string, sb);
		assertEquals(expected, sb.toString());
	}

	public void testUncapitalizeOnCharArrayWriter() {
		this.verifyUncapitalizeOnCharArrayWriter("oracle", new char[] { 'O', 'r', 'a', 'c', 'l', 'e' });
		this.verifyUncapitalizeOnCharArrayWriter("oracle", new char[] { 'o', 'r', 'a', 'c', 'l', 'e' });
		this.verifyUncapitalizeOnCharArrayWriter("   ", new char[] { ' ', ' ', ' ' });
		this.verifyUncapitalizeOnCharArrayWriter("ORACLE", new char[] { 'O', 'R', 'A', 'C', 'L', 'E' });
		this.verifyUncapitalizeOnCharArrayWriter("", new char[0]);
		this.verifyUncapitalizeOnCharArrayWriter("a", new char[] { 'A' });
		this.verifyUncapitalizeOnCharArrayWriter("\u00E9cole", new char[] { '\u00C9', 'c', 'o', 'l', 'e' });
	}

	private void verifyUncapitalizeOnCharArrayWriter(String expected, char[] string) {
		Writer writer = new StringWriter();
		StringTools.uncapitalizeOn(string, writer);
		assertEquals(expected, writer.toString());
	}

	public void testUncapitalizeOnStringWriter() {
		this.verifyUncapitalizeOnStringWriter("oracle", "Oracle");
		this.verifyUncapitalizeOnStringWriter("oracle", "oracle");
		this.verifyUncapitalizeOnStringWriter("   ", "   ");
		this.verifyUncapitalizeOnStringWriter("ORACLE", "ORACLE");
		this.verifyUncapitalizeOnStringWriter("", "");
		this.verifyUncapitalizeOnStringWriter("a", "A");
		this.verifyUncapitalizeOnStringWriter("\u00E9cole", "\u00C9cole"); // �cole->�COLE
	}

	private void verifyUncapitalizeOnStringWriter(String expected, String string) {
		Writer writer = new StringWriter();
		StringTools.uncapitalizeOn(string, writer);
		assertEquals(expected, writer.toString());
	}

	// ********** queries **********

	public void testStringIsEmpty() {
		assertTrue(StringTools.stringIsEmpty((String) null));
		assertTrue(StringTools.stringIsEmpty(""));
		assertTrue(StringTools.stringIsEmpty("      "));
		assertTrue(StringTools.stringIsEmpty("      \t\t   "));
		assertTrue(StringTools.stringIsEmpty("      \t\t   " + StringTools.CR));
	}

	public void testStringsAreEqualIgnoreCase() {
		assertTrue(StringTools.stringsAreEqualIgnoreCase((String) null, (String) null));
		assertFalse(StringTools.stringsAreEqualIgnoreCase(null, "asdf"));
		assertFalse(StringTools.stringsAreEqualIgnoreCase("asdf", null));
		assertTrue(StringTools.stringsAreEqualIgnoreCase("asdf", "asdf"));
		assertTrue(StringTools.stringsAreEqualIgnoreCase("asdf", "ASDF"));
	}

	// ********** conversions **********

	public void testConvertCamelCaseToAllCaps() {
		assertEquals("TEST", StringTools.convertCamelCaseToAllCaps("test"));
		assertEquals("TEST", StringTools.convertCamelCaseToAllCaps("TEST"));
		assertEquals("TEST_TEST", StringTools.convertCamelCaseToAllCaps("testTest"));
		assertEquals("TEST_TEST", StringTools.convertCamelCaseToAllCaps("TestTest"));
		assertEquals("TEST_TEST_TEST", StringTools.convertCamelCaseToAllCaps("testTESTTest"));
		assertEquals("TEST_TEST_TEST", StringTools.convertCamelCaseToAllCaps("TestTESTTest"));
		assertEquals("TEST_TEST_TEST_T", StringTools.convertCamelCaseToAllCaps("TestTESTTestT"));
	}

	public void testConvertCamelCaseToAllCapsOnWriter() {
		this.verifyConvertCamelCaseToAllCapsOnWriter("TEST", "test");
		this.verifyConvertCamelCaseToAllCapsOnWriter("TEST", "TEST");
		this.verifyConvertCamelCaseToAllCapsOnWriter("TEST_TEST", "testTest");
		this.verifyConvertCamelCaseToAllCapsOnWriter("TEST_TEST", "TestTest");
		this.verifyConvertCamelCaseToAllCapsOnWriter("TEST_TEST_TEST", "testTESTTest");
		this.verifyConvertCamelCaseToAllCapsOnWriter("TEST_TEST_TEST", "TestTESTTest");
		this.verifyConvertCamelCaseToAllCapsOnWriter("TEST_TEST_TEST_T", "TestTESTTestT");
	}

	private void verifyConvertCamelCaseToAllCapsOnWriter(String expected, String string) {
		Writer writer = new StringWriter();
		StringTools.convertCamelCaseToAllCapsOn(string, writer);
		assertEquals(expected, writer.toString());
	}

	public void testConvertCamelCaseToAllCapsMaxLength() {
		assertEquals("TEST", StringTools.convertCamelCaseToAllCaps("test", 44));
		assertEquals("TEST", StringTools.convertCamelCaseToAllCaps("test", 4));
		assertEquals("TES", StringTools.convertCamelCaseToAllCaps("test", 3));
		assertEquals("TEST", StringTools.convertCamelCaseToAllCaps("TEST", 5));
		assertEquals("TE", StringTools.convertCamelCaseToAllCaps("TEST", 2));
		assertEquals("TEST_TEST", StringTools.convertCamelCaseToAllCaps("testTest", 9));
		assertEquals("TEST_TES", StringTools.convertCamelCaseToAllCaps("testTest", 8));
		assertEquals("TEST_T", StringTools.convertCamelCaseToAllCaps("testTest", 6));
		assertEquals("TEST_", StringTools.convertCamelCaseToAllCaps("testTest", 5));
		assertEquals("TEST", StringTools.convertCamelCaseToAllCaps("testTest", 4));
		assertEquals("TEST_TEST", StringTools.convertCamelCaseToAllCaps("TestTest", 9));
		assertEquals("TEST_TEST", StringTools.convertCamelCaseToAllCaps("TestTest", 1100));
		assertEquals("TEST_TEST_", StringTools.convertCamelCaseToAllCaps("testTESTTest", 10));
		assertEquals("TEST_TEST_TEST", StringTools.convertCamelCaseToAllCaps("TestTESTTest", 14));
		assertEquals("TEST_TEST_TEST_T", StringTools.convertCamelCaseToAllCaps("TestTESTTestT", 16));
		assertEquals("TEST_TEST_TEST_", StringTools.convertCamelCaseToAllCaps("TestTESTTestT", 15));
	}

	public void testConvertCamelCaseToAllCapsMaxLengthOnWriter() {
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST", "test", 44);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST", "test", 4);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TES", "test", 3);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST", "TEST", 5);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TE", "TEST", 2);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TEST", "testTest", 9);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TES", "testTest", 8);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_T", "testTest", 6);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_", "testTest", 5);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST", "testTest", 4);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TEST", "TestTest", 9);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TEST", "TestTest", 1100);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TEST_", "testTESTTest", 10);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TEST_TEST", "TestTESTTest", 14);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TEST_TEST_T", "TestTESTTestT", 16);
		this.verifyConvertCamelCaseToAllCapsMaxLengthOnWriter("TEST_TEST_TEST_", "TestTESTTestT", 15);
	}

	private void verifyConvertCamelCaseToAllCapsMaxLengthOnWriter(String expected, String string, int max) {
		Writer writer = new StringWriter();
		StringTools.convertCamelCaseToAllCapsOn(string, max, writer);
		assertEquals(expected, writer.toString());
	}

	public void testConvertUnderscoresToCamelCase() {
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("TEST", false));
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("TEST_", false));
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("TEST____", false));
		assertEquals("Test", StringTools.convertUnderscoresToCamelCase("TEST", true));
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("TeST", false));
		assertEquals("testTest", StringTools.convertUnderscoresToCamelCase("TEST_TEST", false));
		assertEquals("testTest", StringTools.convertUnderscoresToCamelCase("TEST___TEST", false));
		assertEquals("TestTest", StringTools.convertUnderscoresToCamelCase("TEST_TEST", true));
		assertEquals("testTestTest", StringTools.convertUnderscoresToCamelCase("TEST_TEST_TEST", false));
		assertEquals("TestTestTest", StringTools.convertUnderscoresToCamelCase("TEST_TEST_TEST", true));
		assertEquals("testTestTestT", StringTools.convertUnderscoresToCamelCase("TEST_TEST_TEST_T", false));
		assertEquals("testTestTestT", StringTools.convertUnderscoresToCamelCase("_TEST_TEST_TEST_T", false));
		assertEquals("testTestTestT", StringTools.convertUnderscoresToCamelCase("__TEST_TEST_TEST_T", false));
		assertEquals("TestTestTestT", StringTools.convertUnderscoresToCamelCase("TEST_TEST_TEST_T", true));
		assertEquals("TestTestTestT", StringTools.convertUnderscoresToCamelCase("_TEST_TEST_TEST_T", true));
		assertEquals("TestTestTestT", StringTools.convertUnderscoresToCamelCase("__TEST_TEST_TEST_T", true));
	}

	public void testConvertUnderscoresToCamelCaseLowercase() {
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("test", false));
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("test_", false));
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("test____", false));
		assertEquals("Test", StringTools.convertUnderscoresToCamelCase("test", true));
		assertEquals("test", StringTools.convertUnderscoresToCamelCase("test", false));
		assertEquals("testTest", StringTools.convertUnderscoresToCamelCase("test_test", false));
		assertEquals("testTest", StringTools.convertUnderscoresToCamelCase("test___test", false));
		assertEquals("TestTest", StringTools.convertUnderscoresToCamelCase("test_test", true));
		assertEquals("testTestTest", StringTools.convertUnderscoresToCamelCase("test_test_test", false));
		assertEquals("TestTestTest", StringTools.convertUnderscoresToCamelCase("test_test_test", true));
		assertEquals("testTestTestT", StringTools.convertUnderscoresToCamelCase("test_test_test_t", false));
		assertEquals("testTestTestT", StringTools.convertUnderscoresToCamelCase("_test_test_test_t", false));
		assertEquals("testTestTestT", StringTools.convertUnderscoresToCamelCase("__test_test_test_t", false));
		assertEquals("TestTestTestT", StringTools.convertUnderscoresToCamelCase("test_test_test_t", true));
		assertEquals("TestTestTestT", StringTools.convertUnderscoresToCamelCase("_test_test_test_t", true));
		assertEquals("TestTestTestT", StringTools.convertUnderscoresToCamelCase("__test_test_test_t", true));
	}

	public void testConvertUnderscoresToCamelCaseOnWriter() {
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "TEST", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "TEST_", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "TEST____", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("Test", "TEST", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "TeST", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTest", "TEST_TEST", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTest", "TEST___TEST", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTest", "TEST_TEST", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTest", "TEST_TEST_TEST", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTest", "TEST_TEST_TEST", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTestT", "TEST_TEST_TEST_T", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTestT", "_TEST_TEST_TEST_T", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTestT", "__TEST_TEST_TEST_T", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTestT", "TEST_TEST_TEST_T", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTestT", "_TEST_TEST_TEST_T", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTestT", "__TEST_TEST_TEST_T", true);
	}

	public void testConvertUnderscoresToCamelCaseOnWriterLowercase() {
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "test", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "test_", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "test____", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("Test", "test", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("test", "test", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTest", "test_test", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTest", "test___test", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTest", "test_test", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTest", "test_test_test", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTest", "test_test_test", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTestT", "test_test_test_t", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTestT", "_test_test_test_t", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("testTestTestT", "__test_test_test_t", false);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTestT", "test_test_test_t", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTestT", "_test_test_test_t", true);
		this.verifyConvertUnderscoresToCamelCaseOnWriter("TestTestTestT", "__test_test_test_t", true);
	}

	private void verifyConvertUnderscoresToCamelCaseOnWriter(String expected, String string, boolean capitalizeFirstLetter) {
		Writer writer = new StringWriter();
		StringTools.convertUnderscoresToCamelCaseOn(string, capitalizeFirstLetter, writer);
		assertEquals(expected, writer.toString());
	}

}