code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.integrations.source.db2;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.ImmutableSet;
  import io.airbyte.commons.json.Jsons;
  import io.airbyte.db.jdbc.JdbcUtils;
  import io.airbyte.integrations.source.jdbc.AbstractJdbcSource;
  import io.airbyte.integrations.source.jdbc.test.JdbcSourceAcceptanceTest;
  import java.sql.JDBCType;
  import java.util.Collections;
  import java.util.Set;
  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.testcontainers.containers.Db2Container;
  
  class Db2JdbcSourceAcceptanceTest extends JdbcSourceAcceptanceTest {
  
    private static Set<String> TEST_TABLES = Collections.emptySet();
    private static Db2Container db;
    private JsonNode config;
  
    @BeforeAll
    static void init() {
      db = new Db2Container("ibmcom/db2:11.5.5.0").acceptLicense();
      db.start();
  
      // Db2 transforms names to upper case, so we need to use upper case name to retrieve data later.
      SCHEMA_NAME = "JDBC_INTEGRATION_TEST1";
      SCHEMA_NAME2 = "JDBC_INTEGRATION_TEST2";
      TEST_SCHEMAS = ImmutableSet.of(SCHEMA_NAME, SCHEMA_NAME2);
      TABLE_NAME = "ID_AND_NAME";
      TABLE_NAME_WITH_SPACES = "ID AND NAME";
      TABLE_NAME_WITHOUT_PK = "ID_AND_NAME_WITHOUT_PK";
      TABLE_NAME_COMPOSITE_PK = "FULL_NAME_COMPOSITE_PK";
      TABLE_NAME_WITHOUT_CURSOR_TYPE = "TABLE_NAME_WITHOUT_CURSOR_TYPE";
      TABLE_NAME_WITH_NULLABLE_CURSOR_TYPE = "TABLE_NAME_WITH_NULLABLE_CURSOR_TYPE";
      TEST_TABLES = ImmutableSet
          .of(TABLE_NAME, TABLE_NAME_WITHOUT_PK, TABLE_NAME_COMPOSITE_PK);
      COL_ID = "ID";
      COL_NAME = "NAME";
      COL_UPDATED_AT = "UPDATED_AT";
      COL_FIRST_NAME = "FIRST_NAME";
      COL_LAST_NAME = "LAST_NAME";
      COL_LAST_NAME_WITH_SPACE = "LAST NAME";
      // In Db2 PK columns must be declared with NOT NULL statement.
      COLUMN_CLAUSE_WITH_PK = "id INTEGER NOT NULL, name VARCHAR(200), updated_at DATE";
      COLUMN_CLAUSE_WITH_COMPOSITE_PK = "first_name VARCHAR(200) NOT NULL, last_name VARCHAR(200) NOT NULL, updated_at DATE";
      // There is no IF EXISTS statement for a schema in Db2.
      // The schema name must be in the catalog when attempting the DROP statement; otherwise an error is
      // returned.
      DROP_SCHEMA_QUERY = "DROP SCHEMA %s RESTRICT";
      CREATE_TABLE_WITHOUT_CURSOR_TYPE_QUERY = "CREATE TABLE %s (%s boolean)";
      INSERT_TABLE_WITHOUT_CURSOR_TYPE_QUERY = "INSERT INTO %s VALUES(true)";
    }
  
    @BeforeEach
    public void setup() throws Exception {
      config = Jsons.jsonNode(ImmutableMap.builder()
          .put(JdbcUtils.HOST_KEY, db.getHost())
          .put(JdbcUtils.PORT_KEY, db.getFirstMappedPort())
          .put("db", db.getDatabaseName())
          .put(JdbcUtils.USERNAME_KEY, db.getUsername())
          .put(JdbcUtils.PASSWORD_KEY, db.getPassword())
          .put(JdbcUtils.ENCRYPTION_KEY, Jsons.jsonNode(ImmutableMap.builder()
              .put("encryption_method", "unencrypted")
              .build()))
          .build());
  
      super.setup();
    }
  
    @AfterEach
    public void clean() throws Exception {
      // In Db2 before dropping a schema, all objects that were in that schema must be dropped or moved to
      // another schema.
      for (final String tableName : TEST_TABLES) {
        final String dropTableQuery = String
            .format("DROP TABLE IF EXISTS %s.%s", SCHEMA_NAME, tableName);
        super.database.execute(connection -> connection.createStatement().execute(dropTableQuery));
      }
      for (int i = 2; i < 10; i++) {
        final String dropTableQuery = String
            .format("DROP TABLE IF EXISTS %s.%s%s", SCHEMA_NAME, TABLE_NAME, i);
        super.database.execute(connection -> connection.createStatement().execute(dropTableQuery));
      }
      super.database.execute(connection -> connection.createStatement().execute(String
          .format("DROP TABLE IF EXISTS %s.%s", SCHEMA_NAME,
              sourceOperations.enquoteIdentifier(connection, TABLE_NAME_WITH_SPACES))));
      super.database.execute(connection -> connection.createStatement().execute(String
          .format("DROP TABLE IF EXISTS %s.%s", SCHEMA_NAME,
              sourceOperations.enquoteIdentifier(connection, TABLE_NAME_WITH_SPACES + 2))));
      super.database.execute(connection -> connection.createStatement().execute(String
          .format("DROP TABLE IF EXISTS %s.%s", SCHEMA_NAME2,
              sourceOperations.enquoteIdentifier(connection, TABLE_NAME))));
      super.database.execute(connection -> connection.createStatement().execute(String
          .format("DROP TABLE IF EXISTS %s.%s", SCHEMA_NAME,
              sourceOperations.enquoteIdentifier(connection, TABLE_NAME_WITHOUT_CURSOR_TYPE))));
      super.database.execute(connection -> connection.createStatement().execute(String
          .format("DROP TABLE IF EXISTS %s.%s", SCHEMA_NAME,
              sourceOperations.enquoteIdentifier(connection, TABLE_NAME_WITH_NULLABLE_CURSOR_TYPE))));
      super.tearDown();
    }
  
    @AfterAll
    static void cleanUp() {
      db.close();
    }
  
    @Override
    public boolean supportsSchemas() {
      return true;
    }
  
    @Override
    public JsonNode getConfig() {
      return Jsons.clone(config);
    }
  
    @Override
    public String getDriverClass() {
      return Db2Source.DRIVER_CLASS;
    }
  
    @Override
    public AbstractJdbcSource<JDBCType> getJdbcSource() {
      return new Db2Source();
    }
  
  }
  