/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package libcore.java.util.zip;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Random;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import junit.framework.TestCase;

public final class ZipInputStreamTest extends TestCase {
    public void testShortMessage() throws IOException {
        byte[] data = "Hello World".getBytes("UTF-8");
        byte[] zipped = ZipOutputStreamTest.zip("short", data);
        assertEquals(Arrays.toString(data), Arrays.toString(unzip("short", zipped)));
    }

    public void testLongMessage() throws IOException {
        byte[] data = new byte[1024 * 1024];
        new Random().nextBytes(data);
        assertTrue(Arrays.equals(data, unzip("r", ZipOutputStreamTest.zip("r", data))));
    }

    public static byte[] unzip(String name, byte[] bytes) throws IOException {
        ZipInputStream in = new ZipInputStream(new ByteArrayInputStream(bytes));
        ByteArrayOutputStream out = new ByteArrayOutputStream();

        ZipEntry entry = in.getNextEntry();
        assertEquals(name, entry.getName());

        byte[] buffer = new byte[1024];
        int count;
        while ((count = in.read(buffer)) != -1) {
            out.write(buffer, 0, count);
        }

        assertNull(in.getNextEntry()); // There's only one entry in the Zip files we create.

        in.close();
        return out.toByteArray();
    }
}