code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.db.jdbc;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.Lists;
  import io.airbyte.commons.io.IOs;
  import io.airbyte.commons.json.Jsons;
  import io.airbyte.commons.string.Strings;
  import io.airbyte.db.factory.DataSourceFactory;
  import io.airbyte.db.factory.DatabaseDriver;
  import io.airbyte.test.utils.PostgreSQLContainerHelper;
  import java.sql.SQLException;
  import java.util.List;
  import java.util.stream.Stream;
  import javax.sql.DataSource;
  import org.junit.jupiter.api.AfterAll;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.testcontainers.containers.PostgreSQLContainer;
  import org.testcontainers.utility.MountableFile;
  
  class TestDefaultJdbcDatabase {
  
    private static final List<JsonNode> RECORDS_AS_JSON = Lists.newArrayList(
        Jsons.jsonNode(ImmutableMap.of("id", 1, "name", "picard")),
        Jsons.jsonNode(ImmutableMap.of("id", 2, "name", "crusher")),
        Jsons.jsonNode(ImmutableMap.of("id", 3, "name", "vash")));
  
    private static PostgreSQLContainer<?> PSQL_DB;
    private final JdbcSourceOperations sourceOperations = JdbcUtils.getDefaultSourceOperations();
    private DataSource dataSource;
    private JdbcDatabase database;
  
    @BeforeAll
    static void init() {
      PSQL_DB = new PostgreSQLContainer<>("postgres:13-alpine");
      PSQL_DB.start();
    }
  
    @AfterAll
    static void cleanUp() {
      PSQL_DB.close();
    }
  
    @BeforeEach
    void setup() throws Exception {
      final String dbName = Strings.addRandomSuffix("db", "_", 10);
  
      final JsonNode config = getConfig(PSQL_DB, dbName);
      final String initScriptName = "init_" + dbName.concat(".sql");
      final String tmpFilePath = IOs.writeFileToRandomTmpDir(initScriptName, "CREATE DATABASE " + dbName + ";");
      PostgreSQLContainerHelper.runSqlScript(MountableFile.forHostPath(tmpFilePath), PSQL_DB);
  
      dataSource = getDataSourceFromConfig(config);
      database = new DefaultJdbcDatabase(dataSource);
      database.execute(connection -> {
        connection.createStatement().execute("CREATE TABLE id_and_name(id INTEGER, name VARCHAR(200));");
        connection.createStatement().execute("INSERT INTO id_and_name (id, name) VALUES (1,'picard'),  (2, 'crusher'), (3, 'vash');");
      });
    }
  
    @AfterEach
    void close() throws Exception {
      DataSourceFactory.close(dataSource);
    }
  
    @Test
    void testBufferedResultQuery() throws SQLException {
      final List<JsonNode> actual = database.bufferedResultSetQuery(
          connection -> connection.createStatement().executeQuery("SELECT * FROM id_and_name;"),
          sourceOperations::rowToJson);
  
      assertEquals(RECORDS_AS_JSON, actual);
    }
  
    @Test
    void testResultSetQuery() throws SQLException {
      try (final Stream<JsonNode> actual = database.unsafeResultSetQuery(
          connection -> connection.createStatement().executeQuery("SELECT * FROM id_and_name;"),
          sourceOperations::rowToJson)) {
        assertEquals(RECORDS_AS_JSON, actual.toList());
      }
    }
  
    @Test
    void testQuery() throws SQLException {
      final List<JsonNode> actual = database.queryJsons(
          connection -> connection.prepareStatement("SELECT * FROM id_and_name;"),
          sourceOperations::rowToJson);
      assertEquals(RECORDS_AS_JSON, actual);
    }
  
    private DataSource getDataSourceFromConfig(final JsonNode config) {
      return DataSourceFactory.create(
          config.get(JdbcUtils.USERNAME_KEY).asText(),
          config.get(JdbcUtils.PASSWORD_KEY).asText(),
          DatabaseDriver.POSTGRESQL.getDriverClassName(),
          String.format(DatabaseDriver.POSTGRESQL.getUrlFormatString(),
              config.get(JdbcUtils.HOST_KEY).asText(),
              config.get(JdbcUtils.PORT_KEY).asInt(),
              config.get(JdbcUtils.DATABASE_KEY).asText()));
    }
  
    private JsonNode getConfig(final PostgreSQLContainer<?> psqlDb, final String dbName) {
      return Jsons.jsonNode(ImmutableMap.builder()
          .put(JdbcUtils.HOST_KEY, psqlDb.getHost())
          .put(JdbcUtils.PORT_KEY, psqlDb.getFirstMappedPort())
          .put(JdbcUtils.DATABASE_KEY, dbName)
          .put(JdbcUtils.USERNAME_KEY, psqlDb.getUsername())
          .put(JdbcUtils.PASSWORD_KEY, psqlDb.getPassword())
          .build());
    }
  
  }
  