Back to Repositories

Testing JDBC Driver Integration Workflow in HikariCP

This test suite validates JDBC driver integration and connection handling in HikariCP’s connection pooling implementation. It focuses on testing driver initialization, connection establishment, and error handling scenarios.

Test Coverage Overview

The test suite provides comprehensive coverage of JDBC driver functionality within HikariCP.

Key areas tested include:

Driver initialization and configuration
Connection pool creation and management
Connection wrapper functionality
Error handling for invalid JDBC URLs

Integration points focus on driver-datasource interaction and connection validation.

Implementation Analysis

The testing approach uses JUnit to verify both successful and failure scenarios of JDBC driver integration. The implementation employs stub drivers and mock objects to isolate connection pool behavior.

Technical patterns include:

Connection pool configuration validation
Driver wrapper testing
Resource cleanup management
Exception handling verification

Technical Details

Testing tools and configuration:

JUnit 4 testing framework
HikariConfig for pool configuration
StubDriver mock implementation
DriverDataSource wrapper testing
Connection validation using test queries
Automated resource cleanup with @After annotations

Best Practices Demonstrated

The test suite exemplifies strong testing practices in database connection management.

Notable practices include:

Proper resource cleanup after tests
Isolated test cases with specific assertions
Comprehensive error scenario coverage
Clear test method naming conventions
Effective use of JUnit annotations

brettwooldridge/hikaricp

src/test/java/com/zaxxer/hikari/pool/JdbcDriverTest.java

            
/*
 * Copyright (C) 2014 Brett Wooldridge
 *
 * 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 com.zaxxer.hikari.pool;

import static com.zaxxer.hikari.pool.TestElf.newHikariConfig;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.sql.Connection;
import java.sql.SQLException;

import org.junit.After;
import org.junit.Test;

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import com.zaxxer.hikari.util.DriverDataSource;

public class JdbcDriverTest
{
   private HikariDataSource ds;

   @After
   public void teardown()
   {
      if (ds != null) {
         ds.close();
      }
   }

   @Test
   public void driverTest1() throws SQLException
   {
      HikariConfig config = newHikariConfig();
      config.setMinimumIdle(1);
      config.setMaximumPoolSize(1);
      config.setConnectionTestQuery("VALUES 1");
      config.setDriverClassName("com.zaxxer.hikari.mocks.StubDriver");
      config.setJdbcUrl("jdbc:stub");
      config.addDataSourceProperty("user", "bart");
      config.addDataSourceProperty("password", "simpson");

      ds = new HikariDataSource(config);

      assertTrue(ds.isWrapperFor(DriverDataSource.class));

      DriverDataSource unwrap = ds.unwrap(DriverDataSource.class);
      assertNotNull(unwrap);

      try (Connection connection = ds.getConnection()) {
         // test that getConnection() succeeds
      }
   }

   @Test
   public void driverTest2() throws SQLException
   {
      HikariConfig config = newHikariConfig();

      config.setMinimumIdle(1);
      config.setMaximumPoolSize(1);
      config.setConnectionTestQuery("VALUES 1");
      config.setDriverClassName("com.zaxxer.hikari.mocks.StubDriver");
      config.setJdbcUrl("jdbc:invalid");

      try {
         ds = new HikariDataSource(config);
      }
      catch (RuntimeException e) {
         assertTrue(e.getMessage().contains("claims to not accept"));
      }
   }
}