3 files changed, 51 insertions, 1 deletions
diff --git a/tests/regressiontests/dateformat/tests.py b/tests/regressiontests/dateformat/tests.py
index 481e36a7dd..d649d4789c 100644
--- a/tests/regressiontests/dateformat/tests.py
+++ b/tests/regressiontests/dateformat/tests.py
@@ -37,7 +37,7 @@ u'th'
 u'31'
 >>> no_tz or format(my_birthday, 'T') == 'CET'
 True
->>> no_tz or format(my_birthday, 'U') == '300531600'
+>>> no_tz or format(my_birthday, 'U') == '300315600'
 True
 >>> format(my_birthday, 'w')
 u'0'
diff --git a/tests/regressiontests/utils/dateformat.py b/tests/regressiontests/utils/dateformat.py
new file mode 100644
index 0000000000..63b8201752
--- /dev/null
+++ b/tests/regressiontests/utils/dateformat.py
@@ -0,0 +1,48 @@
+"""
+>>> from datetime import datetime, date
+>>> from django.utils.dateformat import format
+>>> from django.utils.tzinfo import FixedOffset, LocalTimezone
+
+# date
+>>> d = date(2009, 5, 16)
+>>> date.fromtimestamp(int(format(d, 'U'))) == d
+True
+
+# Naive datetime
+>>> dt = datetime(2009, 5, 16, 5, 30, 30)
+>>> datetime.fromtimestamp(int(format(dt, 'U'))) == dt
+True
+
+# datetime with local tzinfo
+>>> ltz = LocalTimezone(datetime.now())
+>>> dt = datetime(2009, 5, 16, 5, 30, 30, tzinfo=ltz)
+>>> datetime.fromtimestamp(int(format(dt, 'U')), ltz) == dt
+True
+>>> datetime.fromtimestamp(int(format(dt, 'U'))) == dt.replace(tzinfo=None)
+True
+
+# datetime with arbitrary tzinfo
+>>> tz = FixedOffset(-510)
+>>> ltz = LocalTimezone(datetime.now())
+>>> dt = datetime(2009, 5, 16, 5, 30, 30, tzinfo=tz)
+>>> datetime.fromtimestamp(int(format(dt, 'U')), tz) == dt
+True
+>>> datetime.fromtimestamp(int(format(dt, 'U')), ltz) == dt
+True
+>>> datetime.fromtimestamp(int(format(dt, 'U'))) == dt.astimezone(ltz).replace(tzinfo=None)
+True
+>>> datetime.fromtimestamp(int(format(dt, 'U')), tz).utctimetuple() == dt.utctimetuple()
+True
+>>> datetime.fromtimestamp(int(format(dt, 'U')), ltz).utctimetuple() == dt.utctimetuple()
+True
+
+# Epoch
+>>> utc = FixedOffset(0)
+>>> udt = datetime(1970, 1, 1, tzinfo=utc)
+>>> format(udt, 'U')
+u'0'
+"""
+
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()
diff --git a/tests/regressiontests/utils/tests.py b/tests/regressiontests/utils/tests.py
index 485c5faa75..6d345d9afb 100644
--- a/tests/regressiontests/utils/tests.py
+++ b/tests/regressiontests/utils/tests.py
@@ -8,6 +8,7 @@ from django.utils import html, checksums
 
 import timesince
 import datastructures
+import dateformat
 import itercompat
 from decorators import DecoratorFromMiddlewareTests
 
@@ -22,6 +23,7 @@ except NameError:
 __test__ = {
     'timesince': timesince,
     'datastructures': datastructures,
+    'dateformat': dateformat,
     'itercompat': itercompat,
 }