Added is_newer_than function

Added is_newer_than function to compare if the provided
time is newer than current time for specified number of
seconds

Fixes bug 1036343

Change-Id: Ic133b0e7e2337b6b0fdad244ded6a93f8db48379

2 files changed, 17 insertions, 0 deletions

diff --git a/openstack/common/timeutils.py b/openstack/common/timeutils.py
index 93b34fc..8600439 100644
--- a/openstack/common/timeutils.py
+++ b/openstack/common/timeutils.py
@@ -74,6 +74,11 @@ def is_older_than(before, seconds):
     return utcnow() - before > datetime.timedelta(seconds=seconds)
 
 
+def is_newer_than(after, seconds):
+    """Return True if after is newer than seconds."""
+    return after - utcnow() > datetime.timedelta(seconds=seconds)
+
+
 def utcnow_ts():
     """Timestamp version of our utcnow function."""
     return calendar.timegm(utcnow().timetuple())
diff --git a/tests/unit/test_timeutils.py b/tests/unit/test_timeutils.py
index 7e6ae72..38ac3ed 100644
--- a/tests/unit/test_timeutils.py
+++ b/tests/unit/test_timeutils.py
@@ -33,6 +33,8 @@ class TimeUtilsTest(unittest.TestCase):
                                                         tzinfo=utc_timezone)
         self.one_minute_before = datetime.datetime(1997, 8, 29, 6, 13, 0,
                                                    tzinfo=iso8601.iso8601.UTC)
+        self.one_minute_after = datetime.datetime(1997, 8, 29, 6, 15, 0,
+                                                  tzinfo=iso8601.iso8601.UTC)
         self.skynet_self_aware_time_perfect_str = '1997-08-29T06:14:00.000000'
         self.skynet_self_aware_time_perfect = datetime.datetime(1997, 8, 29,
                                                                 6, 14, 0)
@@ -75,6 +77,16 @@ class TimeUtilsTest(unittest.TestCase):
             expect_false = timeutils.is_older_than(self.one_minute_before, 61)
             self.assertFalse(expect_false)
 
+    def test_is_newer_than(self):
+        with mock.patch('datetime.datetime') as datetime_mock:
+            datetime_mock.utcnow.return_value = self.skynet_self_aware_time
+            expect_true = timeutils.is_newer_than(self.one_minute_after, 59)
+            self.assertTrue(expect_true)
+            expect_false = timeutils.is_newer_than(self.one_minute_after, 60)
+            self.assertFalse(expect_false)
+            expect_false = timeutils.is_newer_than(self.one_minute_after, 61)
+            self.assertFalse(expect_false)
+
     def test_utcnow_ts(self):
         skynet_self_aware_timestamp = 872835240
         dt = datetime.datetime.utcfromtimestamp(skynet_self_aware_timestamp)