io.crate.protocols.postgres.MessagesTest.java Source code

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Here is the source code for io.crate.protocols.postgres.MessagesTest.java

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/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.protocols.postgres;

import io.crate.data.RowN;
import io.crate.types.DataTypes;
import io.netty.buffer.ByteBuf;
import io.netty.channel.embedded.EmbeddedChannel;
import org.junit.Test;

import java.nio.charset.StandardCharsets;
import java.util.Arrays;

import static com.carrotsearch.randomizedtesting.RandomizedTest.$;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.core.Is.is;

public class MessagesTest {

    @Test
    public void testNullValuesAddToLength() throws Exception {
        EmbeddedChannel channel = new EmbeddedChannel();
        Messages.sendDataRow(channel, new RowN($(10, null)), Arrays.asList(DataTypes.INTEGER, DataTypes.STRING),
                null);
        channel.flush();
        ByteBuf buffer = channel.readOutbound();

        // message type
        assertThat((char) buffer.readByte(), is('D'));

        // size of the message
        assertThat(buffer.readInt(), is(16));
        assertThat(buffer.readableBytes(), is(12)); // 16 - INT4 because the size was already read
    }

    @Test
    public void testCommandCompleteWithWhitespace() throws Exception {
        final EmbeddedChannel channel = new EmbeddedChannel();
        final String response = "SELECT 42";

        Messages.sendCommandComplete(channel, "Select 1", 42);
        verifyResponse(channel, response);
        Messages.sendCommandComplete(channel, " Select 1", 42);
        verifyResponse(channel, response);
        Messages.sendCommandComplete(channel, "  Select 1 ", 42);
        verifyResponse(channel, response);
        Messages.sendCommandComplete(channel, "\n  Select 1", 42);
        verifyResponse(channel, response);
    }

    private static void verifyResponse(EmbeddedChannel channel, String response) {
        byte[] responseBytes = response.getBytes(StandardCharsets.UTF_8);
        ByteBuf buffer = (ByteBuf) channel.outboundMessages().poll();
        assertThat(buffer.readByte(), is((byte) 'C'));
        assertThat(buffer.readInt(), is(responseBytes.length + 4 + 1));
        byte[] string = new byte[9];
        buffer.readBytes(string);
        assertThat(string, is(responseBytes));
    }
}