[Python-checkins] python/dist/src/Lib/test test_datetime.py,1.37,1.38

tim_one@users.sourceforge.net tim_one@users.sourceforge.net
Fri, 07 Feb 2003 14:50:29 -0800


Update of /cvsroot/python/python/dist/src/Lib/test
In directory sc8-pr-cvs1:/tmp/cvs-serv12260/python/Lib/test

Modified Files:
	test_datetime.py 
Log Message:
Comparison for timedelta, time, date and datetime objects:  __eq__ and
__ne__ no longer complain if they don't know how to compare to the other
thing.  If no meaningful way to compare is known, saying "not equal" is
sensible.  This allows things like

    if adatetime in some_sequence:
and
    somedict[adatetime] = whatever

to work as expected even if some_sequence contains non-datetime objects,
or somedict non-datetime keys, because they only call __eq__.

It still complains (raises TypeError) for mixed-type comparisons in
contexts that require a total ordering, such as list.sort(), use as a
key in a BTree-based data structure, and cmp().


Index: test_datetime.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_datetime.py,v
retrieving revision 1.37
retrieving revision 1.38
diff -C2 -d -r1.37 -r1.38
*** test_datetime.py	7 Feb 2003 21:49:01 -0000	1.37
--- test_datetime.py	7 Feb 2003 22:50:26 -0000	1.38
***************
*** 135,141 ****
  
  #############################################################################
  # timedelta tests
  
! class TestTimeDelta(unittest.TestCase):
  
      def test_constructor(self):
--- 135,183 ----
  
  #############################################################################
+ # Base clase for testing a particular aspect of timedelta, time, date and
+ # datetime comparisons.
+ 
+ class HarmlessMixedComparison(unittest.TestCase):
+     # Test that __eq__ and __ne__ don't complain for mixed-type comparisons.
+ 
+     # Subclasses must define 'theclass', and theclass(1, 1, 1) must be a
+     # legit constructor.
+ 
+     def test_harmless_mixed_comparison(self):
+         me = self.theclass(1, 1, 1)
+ 
+         self.failIf(me == ())
+         self.failUnless(me != ())
+         self.failIf(() == me)
+         self.failUnless(() != me)
+ 
+         self.failUnless(me in [1, 20L, [], me])
+         self.failIf(me not in [1, 20L, [], me])
+ 
+         self.failUnless([] in [me, 1, 20L, []])
+         self.failIf([] not in [me, 1, 20L, []])
+ 
+     def test_harmful_mixed_comparison(self):
+         me = self.theclass(1, 1, 1)
+ 
+         self.assertRaises(TypeError, lambda: me < ())
+         self.assertRaises(TypeError, lambda: me <= ())
+         self.assertRaises(TypeError, lambda: me > ())
+         self.assertRaises(TypeError, lambda: me >= ())
+ 
+         self.assertRaises(TypeError, lambda: () < me)
+         self.assertRaises(TypeError, lambda: () <= me)
+         self.assertRaises(TypeError, lambda: () > me)
+         self.assertRaises(TypeError, lambda: () >= me)
+ 
+         self.assertRaises(TypeError, cmp, (), me)
+         self.assertRaises(TypeError, cmp, me, ())
+ 
+ #############################################################################
  # timedelta tests
  
! class TestTimeDelta(HarmlessMixedComparison):
! 
!     theclass = timedelta
  
      def test_constructor(self):
***************
*** 302,314 ****
              self.assertEqual(cmp(t2, t1), 1)
  
!         for badarg in 10, 10L, 34.5, "abc", {}, [], ():
!             self.assertRaises(TypeError, lambda: t1 == badarg)
!             self.assertRaises(TypeError, lambda: t1 != badarg)
              self.assertRaises(TypeError, lambda: t1 <= badarg)
              self.assertRaises(TypeError, lambda: t1 < badarg)
              self.assertRaises(TypeError, lambda: t1 > badarg)
              self.assertRaises(TypeError, lambda: t1 >= badarg)
-             self.assertRaises(TypeError, lambda: badarg == t1)
-             self.assertRaises(TypeError, lambda: badarg != t1)
              self.assertRaises(TypeError, lambda: badarg <= t1)
              self.assertRaises(TypeError, lambda: badarg < t1)
--- 344,359 ----
              self.assertEqual(cmp(t2, t1), 1)
  
!         badargs = 10, 10L, 34.5, "abc", {}, [], ()
!         for badarg in badargs:
!             self.assertEqual(t1 == badarg, False)
!             self.assertEqual(t1 != badarg, True)
!             self.assertEqual(badarg == t1, False)
!             self.assertEqual(badarg != t1, True)
! 
!         for badarg in badargs:
              self.assertRaises(TypeError, lambda: t1 <= badarg)
              self.assertRaises(TypeError, lambda: t1 < badarg)
              self.assertRaises(TypeError, lambda: t1 > badarg)
              self.assertRaises(TypeError, lambda: t1 >= badarg)
              self.assertRaises(TypeError, lambda: badarg <= t1)
              self.assertRaises(TypeError, lambda: badarg < t1)
***************
*** 447,451 ****
          self.assertEqual(dt2, dt - days)
  
! class TestDate(unittest.TestCase):
      # Tests here should pass for both dates and datetimes, except for a
      # few tests that TestDateTime overrides.
--- 492,496 ----
          self.assertEqual(dt2, dt - days)
  
! class TestDate(HarmlessMixedComparison):
      # Tests here should pass for both dates and datetimes, except for a
      # few tests that TestDateTime overrides.
***************
*** 854,866 ****
              self.assertEqual(cmp(t2, t1), 1)
  
!         for badarg in 10, 10L, 34.5, "abc", {}, [], ():
!             self.assertRaises(TypeError, lambda: t1 == badarg)
!             self.assertRaises(TypeError, lambda: t1 != badarg)
!             self.assertRaises(TypeError, lambda: t1 <= badarg)
              self.assertRaises(TypeError, lambda: t1 < badarg)
              self.assertRaises(TypeError, lambda: t1 > badarg)
              self.assertRaises(TypeError, lambda: t1 >= badarg)
-             self.assertRaises(TypeError, lambda: badarg == t1)
-             self.assertRaises(TypeError, lambda: badarg != t1)
              self.assertRaises(TypeError, lambda: badarg <= t1)
              self.assertRaises(TypeError, lambda: badarg < t1)
--- 899,913 ----
              self.assertEqual(cmp(t2, t1), 1)
  
!         badargs = 10, 10L, 34.5, "abc", {}, [], ()
!         for badarg in badargs:
!             self.assertEqual(t1 == badarg, False)
!             self.assertEqual(t1 != badarg, True)
!             self.assertEqual(badarg == t1, False)
!             self.assertEqual(badarg != t1, True)
! 
!         for badarg in badargs:
              self.assertRaises(TypeError, lambda: t1 < badarg)
              self.assertRaises(TypeError, lambda: t1 > badarg)
              self.assertRaises(TypeError, lambda: t1 >= badarg)
              self.assertRaises(TypeError, lambda: badarg <= t1)
              self.assertRaises(TypeError, lambda: badarg < t1)
***************
*** 1362,1366 ****
          self.assertRaises(ValueError, dt.astimezone, alsobog) # also naive
  
! class TestTime(unittest.TestCase):
  
      theclass = time
--- 1409,1413 ----
          self.assertRaises(ValueError, dt.astimezone, alsobog) # also naive
  
! class TestTime(HarmlessMixedComparison):
  
      theclass = time
***************
*** 1432,1444 ****
          if CMP_BUG_FIXED:
              badargs += (date(1, 1, 1), datetime(1, 1, 1, 1, 1), timedelta(9))
          for badarg in badargs:
-             self.assertRaises(TypeError, lambda: t1 == badarg)
-             self.assertRaises(TypeError, lambda: t1 != badarg)
              self.assertRaises(TypeError, lambda: t1 <= badarg)
              self.assertRaises(TypeError, lambda: t1 < badarg)
              self.assertRaises(TypeError, lambda: t1 > badarg)
              self.assertRaises(TypeError, lambda: t1 >= badarg)
-             self.assertRaises(TypeError, lambda: badarg == t1)
-             self.assertRaises(TypeError, lambda: badarg != t1)
              self.assertRaises(TypeError, lambda: badarg <= t1)
              self.assertRaises(TypeError, lambda: badarg < t1)
--- 1479,1494 ----
          if CMP_BUG_FIXED:
              badargs += (date(1, 1, 1), datetime(1, 1, 1, 1, 1), timedelta(9))
+ 
+         for badarg in badargs:
+             self.assertEqual(t1 == badarg, False)
+             self.assertEqual(t1 != badarg, True)
+             self.assertEqual(badarg == t1, False)
+             self.assertEqual(badarg != t1, True)
+ 
          for badarg in badargs:
              self.assertRaises(TypeError, lambda: t1 <= badarg)
              self.assertRaises(TypeError, lambda: t1 < badarg)
              self.assertRaises(TypeError, lambda: t1 > badarg)
              self.assertRaises(TypeError, lambda: t1 >= badarg)
              self.assertRaises(TypeError, lambda: badarg <= t1)
              self.assertRaises(TypeError, lambda: badarg < t1)