when( context.getRuleDescr() ).thenReturn( ruleDescr );
when( context.getPackageBuilder() ).thenReturn( new PackageBuilder() );
// calling the build method
RuleBuilder builder = new RuleBuilder();
builder.buildAttributes( context );
// check expectations
verify( rule ).setNoLoop( true );
verify( rule ).setAutoFocus( false );
verify( rule ).setAgendaGroup( "my agenda" );