ResourceManagerDefaultImplTest.java

/*******************************************************************************
 * Copyright (c) 2005, 2007 committers of openArchitectureWare and others.
 * 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:
 *     committers of openArchitectureWare - initial API and implementation
 *******************************************************************************/
package org.eclipse.xtend.expression;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringWriter;

import junit.framework.TestCase;

public class ResourceManagerDefaultImplTest extends TestCase {
	private static final String LINE_WRAP = System.getProperty("line.separator");
	private final static String CONTENT = tag("IMPORT ecore") + LINE_WRAP + tag("AROUND Root FOR EPackage") + LINE_WRAP
			+ tag("ENDAROUND");

	class TestResourcManager extends ResourceManagerDefaultImpl {
		public Reader _createReader(InputStream in) {
			return super.createReader(in);
		}
	}

	private TestResourcManager resMgr = new TestResourcManager();

	public void testCreateReader_UTF() throws Exception {
		checkResourceLoading("UTF8", "templatefile-utf8.xpt");
	}

	public void testCreateReader_ISO() throws Exception {
		checkResourceLoading("ISO-8859-1", "templatefile-iso-8859-1.xpt");
	}

	public void testCreateReader_UTF8_autodetect() throws Exception {
		checkResourceLoading(null, "templatefile-utf8.xpt");
	}

	public void testCreateReader_ISO_autodetect() throws Exception {
		checkResourceLoading(null, "templatefile-iso-8859-1.xpt");
	}

	public void testCreateReader_MacRoman_autodetect() throws Exception {
		checkResourceLoading(null, "templatefile-macroman.xpt");
	}

	private void checkResourceLoading(String encoding, String testfile) throws IOException {
		resMgr.setFileEncoding(encoding);
		InputStream is = getClass().getResourceAsStream(testfile);
		assertNotNull(is);
		Reader reader = resMgr._createReader(is);
		String read = read(reader);
		assertNotNull(read);
		assertEquals(unifyLineWrap(CONTENT), unifyLineWrap(read));

	}

	private String unifyLineWrap(String s) {
		if (s == null)
			return null;

		String res = s.replaceAll("\\r\\n", "\n");
		res = res.replaceAll("\\r", "\n");
		return res;
	}

	private String read(Reader r) throws IOException {
		StringWriter s = new StringWriter();
		char[] buf = new char[1024];
		int len;
		len = r.read(buf, 0, buf.length);
		while (len != -1) {
			s.write(buf, 0, len);
			len = r.read(buf, 0, buf.length);
		}
		return s.getBuffer().toString();
	}

	/**
	 * Returns a string encapsuled within Xpand guillemot brackets
	 * 
	 * @param s
	 *            Some string
	 * @return String with brackets - <code<b>�s�</b></code>
	 */
	protected static String tag(final String s) {
		return '\u00ab' + s + '\u00bb';
	}

}