Unable to find the sample data

Hi - I am trying out this code and see that the sample file (data_test.csv) referred to in the below statement is missing. There is a data_test.xlsx but am unable to save it as csv as it has multiple worksheets. Am I missing something?

data = fcm.read_data(file_path= os.path.abspath('../unittests/test_cases/data_test.csv'), 
                      sep_concept='->', csv_sep=';')