core/tests/org.eclipse.dltk.debug.tests/src/org/eclipse/dltk/debug/dbgp/tests/DbgpBase64Tests.java

/*******************************************************************************
 * Copyright (c) 2008 xored software, Inc.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     xored software, Inc. - initial API and Implementation (Alex Panchenko)
 *******************************************************************************/
package org.eclipse.dltk.debug.dbgp.tests;

import static org.junit.Assert.assertEquals;

import org.eclipse.dltk.dbgp.internal.utils.Base64Helper;
import org.junit.Test;

public class DbgpBase64Tests {
	@Test
	public void testNullAndEmpty() {
		assertEquals("", Base64Helper.encodeString(null));
		assertEquals("", Base64Helper.encodeString(""));
		assertEquals("", Base64Helper.decodeString(null));
		assertEquals("", Base64Helper.decodeString(""));
		assertEquals("", Base64Helper.decodeString("\r\n"));
	}
	@Test
	public void testEndode() {
		assertEquals("MTIz", Base64Helper.encodeString("123"));
		assertEquals("MTIzNDU2Nzg5", Base64Helper.encodeString("123456789"));
	}
	@Test
	public void testDecode() {
		assertEquals("123", Base64Helper.decodeString("MTIz"));
		assertEquals("123456789", Base64Helper.decodeString("MTIzNDU2Nzg5"));
	}
	@Test
	public void testDecodeChunked() {
		assertEquals("123", Base64Helper.decodeString("MTIz"));
		assertEquals("123456789", Base64Helper.decodeString("MTIz" + "\n"
				+ "NDU2" + "\n" + "Nzg5"));
	}
	@Test
	public void testLongString() {
		char[] c = new char[256];
		for (int i = 0; i < c.length; ++i) {
			c[i] = (char) i;
		}
		final String input = new String(c);
		final String encoded = Base64Helper.encodeString(input);
		final int chunkSize = 64;
		final int chunkCount = (encoded.length() + chunkSize - 1) / chunkSize;
		final StringBuffer chunked = new StringBuffer();
		for (int i = 0; i < chunkCount; ++i) {
			final int beginIndex = i * chunkSize;
			final int endIndex = Math.min(encoded.length(), beginIndex
					+ chunkSize);
			chunked.append(encoded.substring(beginIndex, endIndex));
			chunked.append("\r\n");
		}
		final String output = Base64Helper.decodeString(chunked.toString());
		assertEquals(input, output);
	}
}