JavaCHARACTER_LITERALTokenResolverTest.java

/*******************************************************************************
 * Copyright (c) 2006-2012
 * Software Technology Group, Dresden University of Technology
 * DevBoost GmbH, Berlin, Amtsgericht Charlottenburg, HRB 140026
 * 
 * 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:
 *   Software Technology Group - TU Dresden, Germany;
 *   DevBoost GmbH - Berlin, Germany
 *      - initial API and implementation
 ******************************************************************************/
package org.emftext.language.java.test.analysis;

import static org.junit.Assert.assertEquals;

import org.emftext.language.java.resource.java.IJavaTokenResolveResult;
import org.emftext.language.java.resource.java.analysis.JavaCHARACTER_LITERALTokenResolver;
import org.emftext.language.java.resource.java.mopp.JavaTokenResolveResult;
import org.junit.Test;

/**
 * Tests the JavaSTRING_LITERALTokenResolver class.
 */
public class JavaCHARACTER_LITERALTokenResolverTest {

	@Test
	public void testUnicodeEscaping() {
		JavaCHARACTER_LITERALTokenResolver resolver = new JavaCHARACTER_LITERALTokenResolver();

		//String character = "\t";
		//System.out.println("ORIG: " + character);
		//System.out.println("RES:  " + resolve(resolver, character));
		//System.out.println("DRES: " + resolver.deResolve(resolve(resolver, character), null,null));

		//surrogates
		assertEquals("'\\uD800'", deResolve(resolver, (char)55296));
		assertEquals("'\\uD804'", deResolve(resolver, (char)55300));
		assertEquals("'\\uDFFF'", deResolve(resolver, (char)57343));
		
		//just before and after surrogates
		assertEquals("'" + (char)55295 + "'", deResolve(resolver, (char)55295));
		assertEquals("'" + (char)57344 + "'", deResolve(resolver, (char)57344));
		
		assertEquals('\\', resolve(resolver, "\\\\"));
		assertEquals('\n', resolve(resolver, "\\n"));
		assertEquals('\b', resolve(resolver, "\\b"));
		assertEquals('\f', resolve(resolver, "\\f"));
		assertEquals('\t', resolve(resolver, "\\t"));
		assertEquals('\r', resolve(resolver, "\\r"));
		assertEquals('\"', resolve(resolver, "\""));
		assertEquals('"', resolve(resolver, "\\\""));
		assertEquals('\"', resolve(resolver, "\\\""));
		assertEquals('\'', resolve(resolver, "\\'"));
	}

	private char resolve(JavaCHARACTER_LITERALTokenResolver resolver, String lexem) {
		IJavaTokenResolveResult result = new JavaTokenResolveResult();
		resolver.resolve("\'" + lexem + "\'", null, result);
		return (Character) result.getResolvedToken();
	}
	
	private String deResolve(JavaCHARACTER_LITERALTokenResolver resolver, Object value) {
		return resolver.deResolve(value, null, null);
	}
}