add test rule to Makefile (& improve test in groupConnectivityNaive)

Makefile

 default: groupConnectivity.so clean_obj
 
+.PHONY: test
+
 groupConnectivity.so: groupConnectivity.pyx group-connectivity.h setup.py compileTimeOptions.h generateCompileTimeOptions.sh rings.h fast-array.h twoCuts.h parmap.py groupConnectivityNaive.py
 	./generateCompileTimeOptions.sh > options.h
 	python setup.py build_ext
@@ -12,3 +14,7 @@ clean_obj:
 clean: clean_obj
 	rm -f groupConnectivity.so
 
+test: *.py
+	python2 parmap.py
+	python2 groupConnectivityNaive.py
+

groupConnectivityNaive.py

@@ -152,7 +152,9 @@ def myHistogram(data):
 
 if __name__ == "__main__":
   import doctest
-    ret = doctest.testmod()
-    print "%i tests of %i failed." % ret
+  (f, t) = doctest.testmod()
+  print "%s: %i tests of %i failed." % (__file__, f, t)
+  if f > 0:
+    exit(1)