test: adds integration tests

Adds integration tests for setting the query options optimizer
statistics package.

@@ -15,10 +15,13 @@
 */
 
 /*
-* Test setting and getting the optimizer version to use.
+* Test setting and getting the following query options:
+* - Optimizer version
+* - Optimizer statistics package
 */
 
 -- Set and get valid values.
+-- Optimizer version
 @EXPECT NO_RESULT
 SET OPTIMIZER_VERSION = '1';
 
@@ -43,7 +46,21 @@ SET OPTIMIZER_VERSION = '';
 @EXPECT RESULT_SET 'OPTIMIZER_VERSION',''
 SHOW VARIABLE OPTIMIZER_VERSION;
 
+-- Optimizer statistics package
+@EXPECT NO_RESULT
+SET OPTIMIZER_STATISTICS_PACKAGE = 'custom-package_withNumbers-1234';
+
+@EXPECT RESULT_SET 'OPTIMIZER_STATISTICS_PACKAGE','custom-package_withNumbers-1234'
+SHOW VARIABLE OPTIMIZER_STATISTICS_PACKAGE;
+
+@EXPECT NO_RESULT
+SET OPTIMIZER_STATISTICS_PACKAGE = '';
+
+@EXPECT RESULT_SET 'OPTIMIZER_STATISTICS_PACKAGE',''
+SHOW VARIABLE OPTIMIZER_STATISTICS_PACKAGE;
+
 -- Try to set invalid values.
+-- Optimizer version
 @EXPECT EXCEPTION INVALID_ARGUMENT 'INVALID_ARGUMENT: Unknown value for OPTIMIZER_VERSION: 'None''
 SET OPTIMIZER_VERSION = 'None';