anchor.diff:          assertThat(tweet2.getContent()).isNotNull().isEqualTo("null");
       }
   ----
  -
   
   ==== Custom replacer
   
  
positive.code: 
  TIP: For complete source code of replacers examples https://github.com/database-rider/database-rider/blob/master/rider-core/src/test/java/com/github/database/rider/core/replacers/[Look here^].
  
  
  ==== Date replacer
  
  Following is an example test using a date replacer:
  
negative.code: ----
  
  ====
  
  === Dynamic connection config
  
  In order to have dynamic JDBC connection on your tests one can use system properties, see example below:
  
  [source,java]
  ----
  @RunWith(JUnit4.class)
  public class EntityManagerSystemConfigOverrideTestIt {
      private static final String PROP_KEY_URL = "javax.persistence.jdbc.url";
      private static final String PROP_VALUE_URL = "jdbc:hsqldb:mem:susi;DB_CLOSE_DELAY=-1";
      private static final String PROP_KEY_DRIVER = "javax.persistence.jdbc.driver";
      private static final String PROP_KEY_USER = "javax.persistence.jdbc.user";
      private static final String PROP_KEY_PASSWORD = "javax.persistence.jdbc.password";
  
      @Rule
      public EntityManagerProvider emProvider = EntityManagerProvider.instance("rules-it");
  
      @Rule
      public DBUnitRule dbUnitRule = DBUnitRule.instance(emProvider.connection());
  
      @BeforeClass
      public static void setup() {
          System.clearProperty(PROP_KEY_URL);
          System.clearProperty(PROP_KEY_DRIVER);
          System.clearProperty(PROP_KEY_USER);
          System.clearProperty(PROP_KEY_PASSWORD);
          System.setProperty(PROP_KEY_URL, "jdbc:hsqldb:mem:susi;DB_CLOSE_DELAY=-1");
          System.setProperty(PROP_KEY_DRIVER, "org.hsqldb.jdbc.JDBCDriver");
          System.setProperty(PROP_KEY_USER, "sa");
          System.setProperty(PROP_KEY_PASSWORD, "");
      }
  
      @AfterClass
      public static void tearDown() {
          System.clearProperty(PROP_KEY_URL);
          System.clearProperty(PROP_KEY_DRIVER);
          System.clearProperty(PROP_KEY_USER);
          System.clearProperty(PROP_KEY_PASSWORD);
      }
  
      //tests using new connection
  ----
  
  This way the https://github.com/database-rider/database-rider/blob/78b0ae11eeed17354f8adc6c35640a160a1447ee/rider-core/src/test/resources/META-INF/persistence.xml#L4-L20[original persistence.xml^] configuration was replaced dynamically before test execution.
  
  === Transactional Tests
  
  