ColumnMixUpTest.java

/*
 * Copyright 2017-2019 the original author or authors.
 *
 * 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 io.r2dbc.postgresql;

import com.zaxxer.hikari.HikariDataSource;
import io.r2dbc.spi.ConnectionFactories;
import io.r2dbc.spi.ConnectionFactory;
import io.r2dbc.spi.ConnectionFactoryOptions;
import io.r2dbc.spi.test.Example;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.jdbc.core.BatchPreparedStatementSetter;
import org.springframework.jdbc.core.JdbcOperations;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.support.TransactionTemplate;
import org.testcontainers.containers.PostgreSQLContainer;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;

import javax.sql.DataSource;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

import static io.r2dbc.postgresql.PostgresqlConnectionFactoryProvider.POSTGRESQL_DRIVER;
import static io.r2dbc.spi.ConnectionFactoryOptions.DATABASE;
import static io.r2dbc.spi.ConnectionFactoryOptions.DRIVER;
import static io.r2dbc.spi.ConnectionFactoryOptions.HOST;
import static io.r2dbc.spi.ConnectionFactoryOptions.PASSWORD;
import static io.r2dbc.spi.ConnectionFactoryOptions.PORT;
import static io.r2dbc.spi.ConnectionFactoryOptions.USER;

final class ColumnMixUpTest {

    private static final int SIZE = 5_000_000;

    private final PostgreSQLContainer<?> container = new PostgreSQLContainer<>("postgres:11.1");
    {
        this.container.start();
    }

    private final ConnectionFactory connectionFactory = ConnectionFactories.get(ConnectionFactoryOptions.builder()
        .option(DRIVER, POSTGRESQL_DRIVER)
        .option(DATABASE, this.container.getDatabaseName())
        .option(HOST, this.container.getContainerIpAddress())
        .option(PORT, this.container.getMappedPort(5432))
        .option(PASSWORD, this.container.getPassword())
        .option(USER, this.container.getUsername())
        .build());

    private final DataSource dataSource = DataSourceBuilder.create()
        .type(HikariDataSource.class)
        .url(this.container.getJdbcUrl())
        .username(this.container.getUsername())
        .password(this.container.getPassword())
        .build();

    private final JdbcOperations jdbcOperations = new JdbcTemplate(this.dataSource);

    private final PlatformTransactionManager transactionManager = new DataSourceTransactionManager(this.dataSource);

    private final TransactionTemplate transactionTemplate = new TransactionTemplate(this.transactionManager);

    @Test
    void columnMixUp() {
        AtomicInteger count = new AtomicInteger(1);

        Mono.from(this.connectionFactory.create())
            .flatMapMany(connection -> Flux.from(connection

                .createStatement("SELECT * from column_mixup")
                .execute())

                .flatMap(result -> result.map((row, rowMetadata) ->
                    String.format("%d: %s", row.get("id", Integer.class), row.get("content", String.class))))

                .concatWith(Example.close(connection)))

            .as(StepVerifier::create)
            .expectNextSequence(IntStream.range(0, SIZE)
                .mapToObj(i -> String.format("%d: value-%d", i + 1, i + 1))
                .collect(Collectors.toList()))
            .verifyComplete();
    }

    @BeforeEach
    void populate() {
        this.jdbcOperations.execute("CREATE TABLE column_mixup ( id SERIAL PRIMARY KEY, content VARCHAR(2000) )");
        this.transactionTemplate.execute(action -> this.jdbcOperations.batchUpdate("INSERT INTO column_mixup(content) VALUES (?)", new BatchPreparedStatementSetter() {

            @Override
            public int getBatchSize() {
                return SIZE;
            }

            @Override
            public void setValues(PreparedStatement ps, int i) throws SQLException {
                ps.setString(1, String.format("value-%d", i + 1));
            }
        }));
    }

}