def test_0025_create_repository_dependency( self ):
        '''Create a repository dependency on blast_datatypes_0120.'''
        '''
        We are at step 3.
        Create a simple repository dependency for blastxml_to_top_descr_0120 that defines a dependency on blast_datatypes_0120.
        '''
        datatypes_repository = self.test_db_util.get_repository_by_name_and_owner( datatypes_repository_name, common.test_user_2_name )
        tool_repository = self.test_db_util.get_repository_by_name_and_owner( tool_repository_name, common.test_user_1_name )
        dependency_xml_path = self.generate_temp_path( 'test_0120', additional_paths=[ 'dependencies' ] )
        datatypes_tuple = ( self.url, datatypes_repository.name, datatypes_repository.user.username, self.get_repository_tip( datatypes_repository ) )
        self.create_repository_dependency( repository=tool_repository, repository_tuples=[ datatypes_tuple ], filepath=dependency_xml_path )