org.graylog2.inputs.syslog.tcp.SyslogTCPFramingRouterHandlerTest.java Source code

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Here is the source code for org.graylog2.inputs.syslog.tcp.SyslogTCPFramingRouterHandlerTest.java

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/**
 * This file is part of Graylog.
 *
 * Graylog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Graylog.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.graylog2.inputs.syslog.tcp;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.handler.codec.Delimiters;
import io.netty.handler.codec.TooLongFrameException;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.nio.charset.StandardCharsets;

import static org.assertj.core.api.Assertions.assertThat;

public class SyslogTCPFramingRouterHandlerTest {
    private EmbeddedChannel channel;

    @Before
    public void setUp() {
        channel = new EmbeddedChannel(new SyslogTCPFramingRouterHandler(32, Delimiters.lineDelimiter()));
    }

    @After
    public void tearDown() {
        assertThat(channel.finish()).isFalse();
    }

    @Test
    public void testMessageReceivedOctetFrame() {
        final ByteBuf buf = Unpooled.copiedBuffer("12 <45>Test 123", StandardCharsets.US_ASCII);
        final ByteBuf expectedBuffer = Unpooled.copiedBuffer("<45>Test 123", StandardCharsets.UTF_8);
        assertThat(channel.writeInbound(buf)).isTrue();
        assertThat((ByteBuf) channel.readInbound()).isEqualTo(expectedBuffer);
        assertThat((ByteBuf) channel.readInbound()).isNull();
    }

    @Test
    public void testMessageReceivedOctetFrameMultipart() {
        final ByteBuf buf1 = Unpooled.copiedBuffer("12 <45>", StandardCharsets.US_ASCII);
        final ByteBuf buf2 = Unpooled.copiedBuffer("Test 123", StandardCharsets.US_ASCII);
        final ByteBuf expectedBuffer = Unpooled.copiedBuffer("<45>Test 123", StandardCharsets.UTF_8);
        assertThat(channel.writeInbound(buf1)).isFalse();
        assertThat(channel.writeInbound(buf2)).isTrue();
        assertThat((ByteBuf) channel.readInbound()).isEqualTo(expectedBuffer);
        assertThat((ByteBuf) channel.readInbound()).isNull();
    }

    @Test
    public void testMessageReceivedOctetFrameIncomplete() {
        final ByteBuf buf = Unpooled.copiedBuffer("12 <45>", StandardCharsets.US_ASCII);
        assertThat(channel.writeInbound(buf)).isFalse();
        assertThat((ByteBuf) channel.readInbound()).isNull();
    }

    @Test
    public void testMessageReceivedDelimiterFrame() {
        final ByteBuf buf = Unpooled.copiedBuffer("<45>\n", StandardCharsets.US_ASCII);
        final ByteBuf expectedBuffer = Unpooled.copiedBuffer("<45>", StandardCharsets.US_ASCII);
        assertThat(channel.writeInbound(buf)).isTrue();
        assertThat((ByteBuf) channel.readInbound()).isEqualTo(expectedBuffer);
        assertThat((ByteBuf) channel.readInbound()).isNull();
    }

    @Test
    public void testMessageReceivedDelimiterFrameMultipart() {
        final ByteBuf buf1 = Unpooled.copiedBuffer("<45>", StandardCharsets.US_ASCII);
        final ByteBuf buf2 = Unpooled.copiedBuffer("Test 123\n", StandardCharsets.US_ASCII);
        final ByteBuf expectedBuffer = Unpooled.copiedBuffer("<45>Test 123", StandardCharsets.US_ASCII);
        assertThat(channel.writeInbound(buf1)).isFalse();
        assertThat(channel.writeInbound(buf2)).isTrue();
        assertThat((ByteBuf) channel.readInbound()).isEqualTo(expectedBuffer);
        assertThat((ByteBuf) channel.readInbound()).isNull();
    }

    @Test
    public void testMessageReceivedDelimiterFrameIncomplete() {
        final ByteBuf buf = Unpooled.copiedBuffer("<45>", StandardCharsets.US_ASCII);
        assertThat(channel.writeInbound(buf)).isFalse();
        assertThat((ByteBuf) channel.readInbound()).isNull();
    }

    @Test
    public void testMessageReceivedDelimiterFrameLongerThanMaxFrameLength() {
        final ByteBuf buf = Unpooled.copiedBuffer("<45>012345678901234567890123456789\n",
                StandardCharsets.US_ASCII);
        assertThat(buf.readableBytes()).isGreaterThan(32);

        try {
            channel.writeInbound(buf);
        } catch (TooLongFrameException e) {
            assertThat(e).hasMessage("frame length (34) exceeds the allowed maximum (32)");
        }
    }

    @Test
    public void testMessageReceivedWithEmptyBuffer() {
        final ByteBuf emptyBuffer = Unpooled.EMPTY_BUFFER;
        assertThat(channel.writeInbound(emptyBuffer)).isTrue();
        assertThat((ByteBuf) channel.readInbound()).isEqualTo(emptyBuffer);
        assertThat((ByteBuf) channel.readInbound()).isNull();
    }
}