package net.sourceforge.phpeclipse.xdebug.core;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Random;

import junit.framework.TestCase;

public class Base64Test extends TestCase {
	private static final long SEED = 12345678;
	private static Random s_random = new Random(SEED);

	private byte[] createData(int length) throws Exception {
		byte[] bytes = new byte[length];
		s_random.nextBytes(bytes);
		return bytes;
	}

	private void runStreamTest(int length) throws Exception {
		byte[] data = createData(length);
		ByteArrayOutputStream out_bytes = new ByteArrayOutputStream();
		OutputStream out = new Base64.OutputStream(out_bytes);
		out.write(data);
		out.close();
		byte[] encoded = out_bytes.toByteArray();
		byte[] decoded = Base64.decode(encoded, 0, encoded.length);
		assertTrue(Arrays.equals(data, decoded));

		Base64.InputStream in = new Base64.InputStream(
				new ByteArrayInputStream(encoded));
		out_bytes = new ByteArrayOutputStream();
		byte[] buffer = new byte[3];
		for (int n = in.read(buffer); n > 0; n = in.read(buffer)) {
			out_bytes.write(buffer, 0, n);
		}
		out_bytes.close();
		in.close();
		decoded = out_bytes.toByteArray();
		assertTrue(Arrays.equals(data, decoded));
	}

	public void testStreams() throws Exception {
		for (int i = 0; i < 100; ++i) {
			runStreamTest(i);
		}
		for (int i = 100; i < 2000; i += 250) {
			runStreamTest(i);
		}
		for (int i = 2000; i < 80000; i += 1000) {
			runStreamTest(i);
		}
	}
}