https://github.com/robotframework/robotframework/blob/master/doc/releasenotes/rf-3.2.rst#id151
- 测试用例解析文件后缀名调整为缺省仅解析“.robot”文件。需要解析其它如，“.tsv”、“.txt”文件时，需要在执行参数加上“--extension robot:tsv:txt”参数。
robot --extension robot:tsv:txt
Only *.robot files are parsed by default
- 测试目录解析API由robot.api.TestDataDirectory调整为robot.running.TestSuiteBuilder。
# after RF 3.2.x
from robot.running import TestSuiteBuilder
root_tc_node = TestSuiteBuilder(included_extensions=('robot','tsv','txt')).build(rf_source)
# before RF 3.2.x
from robot.api import TestDataDirectory
root_tc_node = TestDataDirectory(source=rf_source).populate()
