/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.kafka.common.compress;

import org.apache.kafka.common.record.RecordBatch;
import org.apache.kafka.common.utils.BufferSupplier;
import org.apache.kafka.common.utils.ByteBufferOutputStream;
import org.junit.jupiter.api.Test;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Collections;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class NoCompressionTest {

    @Test
    public void testCompressionDecompression() throws IOException {
        NoCompression compression = Compression.NONE;
        byte[] data = String.join("", Collections.nCopies(256, "data")).getBytes(StandardCharsets.UTF_8);

        for (byte magic : Arrays.asList(RecordBatch.MAGIC_VALUE_V0, RecordBatch.MAGIC_VALUE_V1, RecordBatch.MAGIC_VALUE_V2)) {
            ByteBufferOutputStream bufferStream = new ByteBufferOutputStream(4);
            try (OutputStream out = compression.wrapForOutput(bufferStream, magic)) {
                out.write(data);
                out.flush();
            }
            bufferStream.buffer().flip();
            assertArrayEquals(data, bufferStream.buffer().array());

            try (InputStream inputStream = compression.wrapForInput(bufferStream.buffer(), magic, BufferSupplier.create())) {
                byte[] result = new byte[data.length];
                int read = inputStream.read(result);
                assertEquals(data.length, read);
                assertArrayEquals(data, result);
            }
        }
    }
}
