Use package-level logger for test-related warnings.

Do not use root logger for output from diffpy.srreal.tests.

Author: pavoljuhas

diffpy/srreal/tests/__init__.py

@@ -17,6 +17,13 @@
 """
 
 
+# create logger instance for the tests subpackage
+import logging
+
+logging.basicConfig()
+logger = logging.getLogger(__name__)
+del logging
+
 
 def testsuite():
     '''Build a unit tests suite for the diffpy.srreal package.

diffpy/srreal/tests/testutils.py

@@ -10,9 +10,8 @@
 """
 
 
-import logging
-
 from diffpy.srreal.structureconverters import convertObjCrystCrystal
+from diffpy.srreal.tests import logger
 
 # class TestCaseObjCrystOptional
 
@@ -22,10 +21,10 @@
     convertObjCrystCrystal(pyobjcryst.crystal.Crystal())
 except ImportError:
     TestCaseObjCrystOptional = object
-    logging.warning('Cannot import pyobjcryst, pyobjcryst tests skipped.')
+    logger.warning('Cannot import pyobjcryst, pyobjcryst tests skipped.')
 except TypeError:
     TestCaseObjCrystOptional = object
-    logging.warning('Compiled without ObjCryst, pyobjcryst tests skipped.')
+    logger.warning('Compiled without ObjCryst, pyobjcryst tests skipped.')
 
 # class TestCasePeriodictableOptional
 
@@ -34,7 +33,7 @@
     from unittest import TestCase as TestCasePeriodictableOptional
 except ImportError:
     TestCasePeriodictableOptional = object
-    logging.warning('Cannot import periodictable, periodictable tests skipped.')
+    logger.warning('Cannot import periodictable, periodictable tests skipped.')
 
 # helper functions