content: /*
   * Copyright (c) 2002, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
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   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
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   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
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   */
  
  package testsuite.simple;
  
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.sql.SQLException;
  
  import org.junit.jupiter.api.Test;
  
  import testsuite.BaseTestCase;
  
  public class TransactionTest extends BaseTestCase {
      private static final double DOUBLE_CONST = 25.4312;
      private static final double EPSILON = .0000001;
  
      @Test
      public void testTransaction() throws SQLException {
          try {
              createTable("trans_test", "(id INT NOT NULL PRIMARY KEY, decdata DOUBLE)", "InnoDB");
              this.conn.setAutoCommit(false);
              this.stmt.executeUpdate("INSERT INTO trans_test (id, decdata) VALUES (1, 1.0)");
              this.conn.rollback();
              this.rs = this.stmt.executeQuery("SELECT * from trans_test");
  
              boolean hasResults = this.rs.next();
              assertTrue(hasResults != true, "Results returned, rollback to empty table failed");
              this.stmt.executeUpdate("INSERT INTO trans_test (id, decdata) VALUES (2, " + DOUBLE_CONST + ")");
              this.conn.commit();
              this.rs = this.stmt.executeQuery("SELECT * from trans_test where id=2");
              hasResults = this.rs.next();
              assertTrue(hasResults, "No rows in table after INSERT");
  
              double doubleVal = this.rs.getDouble(2);
              double delta = Math.abs(DOUBLE_CONST - doubleVal);
              assertTrue((delta < EPSILON), "Double value returned != " + DOUBLE_CONST);
          } finally {
              this.conn.setAutoCommit(true);
          }
      }
  }
  