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/*******************************************************************************
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* Copyright (c) 2006 Wind River Systems, Inc. and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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* Anton Leherbauer - initial API and implementation
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*******************************************************************************/
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package org.eclipse.cdt.ui.tests.text;
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import junit.framework.Test;
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import junit.framework.TestCase;
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import junit.framework.TestSuite;
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import org.eclipse.cdt.internal.ui.text.NumberRule;
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import org.eclipse.jface.text.Document;
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import org.eclipse.jface.text.rules.IRule;
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import org.eclipse.jface.text.rules.IToken;
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import org.eclipse.jface.text.rules.RuleBasedScanner;
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import org.eclipse.jface.text.rules.Token;
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* Testing the NumberRule matching integers and floats.
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public class NumberRuleTest extends TestCase {
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private static final Object NUMBER = "number";
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private RuleBasedScanner fScanner;
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private Document fDocument;
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public NumberRuleTest(String name) {
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public static Test suite() {
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return new TestSuite(NumberRuleTest.class);
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protected void setUp() throws Exception {
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fScanner = new RuleBasedScanner() {};
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fScanner.setRules(new IRule[] {
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new NumberRule(new Token(NUMBER))
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fDocument = new Document();
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protected void tearDown() throws Exception {
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public void testIntegers() {
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assertNumber("123456789");
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assertNumber("-123456789");
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assertNumber("+123456789");
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assertNumber("0xaffe");
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assertNumber("-0xaffe");
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assertNumber("+0xaffe");
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assertNumber("0Xaffe");
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assertNumber("+0XaFFe");
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assertNumber("0xabcdefABCDEF");
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assertNumber("0x0123456789");
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public void testFloats() {
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assertNumber("0.123456789");
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assertNumber("-0.123456789");
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assertNumber("+12345.6789");
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assertNumber("-.1e5");
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assertNumber("1e+55");
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public void testNonNumbers() {
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// test pathological cases
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assertNoNumber("-.");
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assertNoNumber("+.");
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assertNoNumber(".x");
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assertNoNumber("-x");
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assertNoNumber(".e");
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assertNoNumber("-e");
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assertNoNumber("+e");
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// assertNoNumber("0x");
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// assertNoNumber("1e");
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// assertNoNumber("1e+");
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public void testBug163691() {
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assertNoNumber("+x1");
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assertNoNumber("-z0");
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assertNoNumber("- 0");
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assertNoNumber("+ 9");
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* Validate that given string is recognized as a number.
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private void assertNumber(String string) {
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fDocument.set(string);
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fScanner.setRange(fDocument, 0, fDocument.getLength());
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IToken token = fScanner.nextToken();
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assertSame(NUMBER, token.getData());
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assertEquals(string.length(), fScanner.getTokenLength());
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* Validate that given string is not recognized as a number.
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private void assertNoNumber(String string) {
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fDocument.set(string);
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fScanner.setRange(fDocument, 0, fDocument.getLength());
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IToken token = fScanner.nextToken();
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assertNotSame(NUMBER, token.getData());