Implement a proper timestamp comparison with tolerance.

Author: jaraco

Lib/test/test_zipfile/test_core.py

@@ -1824,9 +1824,13 @@ def test_write_without_source_date_epoch(self):
 
             with zipfile.ZipFile(TESTFN, "r") as zf:
                 zip_info = zf.getinfo("test_no_source_date_epoch.txt")
-                current_time = time.localtime()[:6]
-                for z_time, c_time in zip(zip_info.date_time, current_time):
-                    self.assertAlmostEqual(z_time, c_time, delta=1)
+                self.assertTimestampAlmostEqual(time.localtime(), zip_info.date_time, tolerance=1)
+
+    def assertTimestampAlmostEqual(self, time1, time2, tolerance):
+        import datetime
+        dt1 = datetime.datetime(*time1[:6])
+        dt2 = datetime.datetime(*time2[:6])
+        self.assertLessEqual((dt1 - dt2).total_seconds(), tolerance)
 
     def test_close(self):
         """Check that the zipfile is closed after the 'with' block."""