Fix wrap-range bug

CHANGELOG

@@ -1,5 +1,8 @@
 CHANGELOG
 
+2010.12.07; Tuesday
+    Fixed bug in which wrap-around ranges sometimes skip values.
+
 2010.11.29; Monday
     Flawed implementation of the day of the week / day of the month changed
     made on 2010.11.15 corrected and "test_dom_either_or_dow" made more

README.markdown

@@ -26,7 +26,7 @@ Examples
     >>> job.check_trigger((2010, 5, 2, 1, 0), utc_offset=-6)
     True
 
-### Simple user-space cron in less than ten lines:  ###
+### Simple cron scheduler in less than ten lines:  ###
 
     import time
     import os
@@ -40,4 +40,3 @@ Examples
                 os.system(job.comment)
 
         time.sleep(60)
-

cronex.py

@@ -345,10 +345,8 @@ def parse_atom(parse, minmax):
             return set(xrange(prefix, suffix + 1, increment))
         else:
             # Example: 12-4/2; (12, 12 + n, ..., 12 + m*n) U (n_0, ..., 4)
-            top = xrange(prefix, minmax[1] + 1, increment)
-            ceilvalue = increment - (minmax[1] - top[-1] - 1)
-            bottom = set(xrange(ceilvalue - minmax[0], suffix + 1, increment))
-            bottom.update(top)
-            return bottom
+            noskips = list(xrange(prefix, minmax[1] + 1))
+            noskips+= list(xrange(minmax[0], suffix + 1))
+            return set(noskips[::increment])
     else:
         raise ValueError("Atom \"%s\" not in a recognized format." % parse )

test/test_cronex.py

@@ -99,7 +99,8 @@ def test_parse_atom(self):
             (('11-5/3',(1,14)),set([11, 14, 3])),
             (('*',(1, 100)), set(xrange(1,101))),
             (('*/5',(1,100)), set(xrange(1,101,5))),
-            (('666',(1,1000)), set([666]))]
+            (('666',(1,1000)), set([666])),
+            (('21-1',(0,23)), set([21,22,23,0,1]))]
 
         for give_the_function, want_from_function in input_expect:
             self.assertEqual(want_from_function,