How to Run Unit Tests

Basically, we can perform unit tests as follows:

$ mvn clean install

Specifying Session Variables

You can add certain session variables to running unit tests as the following. You can see all supported session variables by executing \help set in tsql.

$ mvn clean install -D[SESSION_VAR_NAME]=[SESSION_VAR_VALUE]

Test of Byte Code Generation

Tajo uses java byte code generation on the fly. Currently, this work is experimental and optional feature. So, in order to test it, you should add one parameter to mvn as follows:

$ mvn clean install -DCODEGEN=true

TestCatalog

TestCatalog can perform unit tests for various catalog drivers. In order to specify the driver to be tested, add the following JVM options.

JVM Options for MySQLStore:

-Dtajo.catalog.store.class=org.apache.tajo.catalog.store.MySQLStore -Dtajo.catalog.connection.id=tajo -Dtajo.catalog.connection.password=password -Dtajo.catalog.uri=jdbc:mysql://localhost:3306/tajo

or

JVM Options for PostgreSQLStore

-Dtajo.catalog.store.class=org.apache.tajo.catalog.store.PostgreSQLStore -Dtajo.catalog.connection.id=hyunsik -Dtajo.catalog.connection.password=password -Dtajo.catalog.uri=jdbc:postgresql://localhost/hyunsik

Using HiveCatalogStore for integration unit tests

Tajo includes lots of query tests (call integration test) in order to verify the various query cases and the integrity of the results.
The integration test uses one of catalog store driver, and in default, it uses DerbyStore. But, you can change the catalog store as follows:

mvn clean test -Dtajo.catalog.store.class=org.apache.tajo.catalog.store.HiveCatalogStore 

Printing Stacktrace of All Errors

Basically, Tajo ignores the error message caused by TajoException and TajoRuntimeException because those exceptions are passed into TajoClient. Nevertheless, you may want to see them because of debugging. If you want it, you just add the VM option -Dtajo.debug.enabled=true to your maven or IDE as follows:

mvn install -Dtajo.debug=true