org.codice.ddf.libs.mpeg.transport.MpegTransportStreamMetadataExtractorTest.java Source code

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Here is the source code for org.codice.ddf.libs.mpeg.transport.MpegTransportStreamMetadataExtractorTest.java

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/**
 * Copyright (c) Codice Foundation
 * <p>
 * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */
package org.codice.ddf.libs.mpeg.transport;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.collection.IsMapContaining.hasKey;
import static org.junit.Assert.assertThat;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.function.BiConsumer;

import org.apache.commons.io.IOUtils;
import org.junit.Test;
import org.mockito.ArgumentCaptor;

import com.google.common.io.ByteSource;

public class MpegTransportStreamMetadataExtractorTest {
    private MpegTransportStreamMetadataExtractor getExtractor() throws IOException {
        final ByteSource byteSource = ByteSource
                .wrap(IOUtils.toByteArray(getClass().getClassLoader().getResourceAsStream("dayflight.mpg")));

        return new MpegTransportStreamMetadataExtractor(byteSource);
    }

    @Test
    public void testExtractCallback() throws Exception {
        final MpegTransportStreamMetadataExtractor extractor = getExtractor();

        // Mockito cannot spy anonymous classes.
        final BiConsumer<Integer, byte[]> callback = new BiConsumer<Integer, byte[]>() {
            @Override
            public void accept(Integer integer, byte[] bytes) {
            }
        };
        final BiConsumer<Integer, byte[]> callbackSpy = spy(callback);
        extractor.getMetadata(callbackSpy);

        // The packet ID of the metadata stream in this file is 497.
        final ArgumentCaptor<byte[]> metadataCaptor = ArgumentCaptor.forClass(byte[].class);
        verify(callbackSpy, times(12)).accept(eq(497), metadataCaptor.capture());

        verifyExtractedBytes(metadataCaptor.getAllValues());
    }

    @Test
    public void testExtractAll() throws Exception {
        final MpegTransportStreamMetadataExtractor extractor = getExtractor();

        final Map<Integer, List<byte[]>> metadataStreams = extractor.getMetadata();

        // The packet ID of the metadata stream in this file is 497.
        assertThat(metadataStreams, hasKey(497));

        verifyExtractedBytes(metadataStreams.get(497));
    }

    private void verifyExtractedBytes(final List<byte[]> metadataPackets) {
        assertThat(metadataPackets.size(), is(12));

        final byte[] expectedMetadataBytesNoPayload = new byte[] { 0x00, 0x00, 0x01, (byte) 0xBD, 0x00, 0x03,
                (byte) 0x84, 0x00, 0x00 };

        final byte[] expectedHeaderMetadataBytesWithPayload = new byte[] { 0x00, 0x00, 0x01, (byte) 0xBD, 0x00,
                (byte) 0xA6 };

        for (int packetNum = 0; packetNum < metadataPackets.size(); ++packetNum) {
            final byte[] metadataPacketBytes = metadataPackets.get(packetNum);
            // The test file has 12 metadata packets that belong to the metadata stream. The 11th
            // packet is the only one with a payload.
            if (packetNum == 10) {
                // The last byte in the header (0xA6) is the length of the payload.
                assertThat(metadataPacketBytes.length, is(0xA6 + expectedHeaderMetadataBytesWithPayload.length));
                assertThat(Arrays.copyOf(metadataPacketBytes, 6), is(expectedHeaderMetadataBytesWithPayload));
            } else {
                assertThat(metadataPacketBytes, is(expectedMetadataBytesNoPayload));
            }
        }
    }
}