B18471 Unit Tests

Unit TestsPassed

	Time	Test
	0 ms	Coverage Data
	1,289 ms	Jenkins > .tox.py3.lib.python3.7.site-packages.swh.clearlydefined.tests.test_mapping::test_mapping
	37 ms	Jenkins > .tox.py3.lib.python3.7.site-packages.swh.clearlydefined.tests.test_mapping::test_mapping_with_empty_sha1
	166 ms	Jenkins > .tox.py3.lib.python3.7.site-packages.swh.clearlydefined.tests.test_mapping::test_mapping_with_wrong_sha1