Add docstring to test_version

Signed-off-by: Jean-Christophe Morin <[email protected]>

src/rez/cli/selftest.py

@@ -59,6 +59,9 @@ def __call__(self, parser, namespace, values, option_string=None):
 
     # create argparse entry for each module's unit test
     for name, module in sorted(tests):
+        if not module.__doc__:
+            raise RuntimeError("Module {0!r} doesn't have a docstring. Please add one.".format(module.__file__))
+
         parser.add_argument(
             "--%s" % name, action=AddTestModuleAction, nargs=0,
             dest="module_tests", default=[],

src/rez/tests/test_version.py

@@ -1,16 +1,18 @@
 # SPDX-License-Identifier: Apache-2.0
 # Copyright Contributors to the Rez Project
 
+"""
+unit tests for 'rez.version' module
+"""
+import random
+import textwrap
+import unittest
 
 from rez.version import Version, AlphanumericVersionToken, \
     VersionRange, reverse_sort_key
 from rez.version._version import _ReversedComparable
 from rez.version import Requirement, RequirementList
 from rez.version import VersionError
-import random
-import textwrap
-import unittest
-
 
 
 def _print(txt=''):