Test for log compression

Closes: #1664
Approved by: lukash

tests/test_logging.py

@@ -22,6 +22,7 @@
 
 import logging
 import collections
+import gzip
 import operator
 import os
 import tempfile
@@ -183,3 +184,25 @@ def test_setup_only_once(self):
  self.logdir, self.log_size, self.log_rotate, self.log_compress)
  # no new handlers
  self.assertEqual(cnt, len(logger.handlers))
+
+ def test_log_compression(self):
+ # log nothing to the console and set log_compress=True and log_size to minimal size, so it's always rotated:
+ self.logging._setup(
+ dnf.logging.SUPERCRITICAL, dnf.logging.SUPERCRITICAL, dnf.logging.TRACE,
+ self.logdir, log_size=1, log_rotate=self.log_rotate, log_compress=True)
+ logger = logging.getLogger("dnf")
+ with tests.support.patch_std_streams() as (stdout, stderr):
+ logger.info("i")
+ logger.critical("c")
+ logfile = os.path.join(self.logdir, "dnf.log")
+ self.assertFile(logfile)
+ with open(logfile) as f:
+ msgs = map(operator.attrgetter("message"),
+ map(_split_logfile_entry, f.readlines()))
+ self.assertSequenceEqual(list(msgs), ['c'])
+ logfile_rotated = os.path.join(self.logdir, "dnf.log.1.gz")
+ self.assertFile(logfile_rotated)
+ with gzip.open(logfile_rotated, 'rt') as f:
+ msgs = map(operator.attrgetter("message"),
+ map(_split_logfile_entry, f.readlines()))
+ self.assertSequenceEqual(list(msgs), ['i'])