test that 4 occurences of log "skipping url replacement" are found

tests/support.py

@@ -8,6 +8,8 @@ import os
 import re
 import subprocess
 import sys
+import logging
+from logging.handlers import BufferingHandler
 
 from functools import wraps
 from contextlib import contextmanager
@@ -157,3 +159,18 @@ def get_settings():
     settings['DIRECT_TEMPLATES'] = ['archives']
     settings['filenames'] = {}
     return settings
+
+
+class LogCountHandler(BufferingHandler):
+    """
+    Capturing and counting logged messages.
+    """
+
+    def __init__(self, capacity=1000):
+        logging.handlers.BufferingHandler.__init__(self, capacity)
+
+    def count_logs(self, msg=None, level=None):
+        return len([l for l in self.buffer
+            if (msg is None or re.match(msg, l.getMessage()))
+            and (level is None or l.levelno == level)
+            ])

tests/test_pelican.py

@@ -8,11 +8,13 @@ from filecmp import dircmp
 from tempfile import mkdtemp
 from shutil import rmtree
 import locale
+import logging
 
 from mock import patch
 
 from pelican import Pelican
 from pelican.settings import read_settings
+from .support import LogCountHandler
 
 CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
 SAMPLES_PATH = os.path.abspath(os.sep.join((CURRENT_DIR, "..", "samples")))
@@ -42,6 +44,8 @@ class TestPelican(unittest.TestCase):
     # to run pelican in different situations and see how it behaves
 
     def setUp(self):
+        self.logcount_handler = LogCountHandler()
+        logging.getLogger().addHandler(self.logcount_handler)
         self.temp_path = mkdtemp()
         self.old_locale = locale.setlocale(locale.LC_ALL)
         locale.setlocale(locale.LC_ALL, 'C')
@@ -49,6 +53,7 @@ class TestPelican(unittest.TestCase):
     def tearDown(self):
         rmtree(self.temp_path)
         locale.setlocale(locale.LC_ALL, self.old_locale)
+        logging.getLogger().removeHandler(self.logcount_handler)
 
     def assertFilesEqual(self, diff):
         msg = "some generated files differ from the expected functional " \
@@ -73,6 +78,10 @@ class TestPelican(unittest.TestCase):
         pelican.run()
         dcmp = dircmp(self.temp_path, os.sep.join((OUTPUT_PATH, "basic")))
         self.assertFilesEqual(recursiveDiff(dcmp))
+        self.assertEqual(self.logcount_handler.count_logs(
+            msg="Unable to find.*skipping url replacement",
+            level=logging.WARNING,
+            ), 4, msg="bad number of occurences found for this log")
 
     def test_custom_generation_works(self):
         # the same thing with a specified set of settings should work