add the base test in #16
loglevel for utils.py
fix #17
modulize the test
re-generated testes reference of updatded version
Merge branch 'regen_tests' into same_result_for_s2t_and_t2s
add a complete test, fix #16
update version because of bug fix in #16
Merge pull request #20 from sih4sing5hong5/same_result_for_s2t_and_t2s

test s2t and t2s