Add tests for parsers validation #39
Add tests for parsers validation #39

The PR #43 was missing tests. This add some minimal test for the
parsers/validation.py module and the two modified functions in #43:

 - validate_pkg_cr_text()
 - validate_file_cpyright()

Signed-off-by: Philippe Ombredanne <ca95c4a6a4931f366cbdaf5878c5016609417d37@nexb.com>
spdx/tools-python