TST: Add test for FilterReader [Init] `maxlines` override

fail2ban/tests/clientreadertestcase.py

@@ -139,7 +139,8 @@ class FilterReaderTest(unittest.TestCase):
 			"error: PAM: )?User not known to the\\nunderlying authentication."
 			"+$<SKIPLINES>^.+ module for .* from <HOST>\\s*$"],
 			['set', 'testcase01', 'addignoreregex', 
-			"^.+ john from host 192.168.1.1\\s*$"]]
+			"^.+ john from host 192.168.1.1\\s*$"],
+			['set', 'testcase01', 'maxlines', "1"]]
 		filterReader = FilterReader("testcase01", "testcase01", {})
 		filterReader.setBaseDir(TEST_FILES_DIR)
 		filterReader.read()
@@ -150,6 +151,15 @@ class FilterReaderTest(unittest.TestCase):
 		# is unreliable
 		self.assertEquals(sorted(filterReader.convert()), sorted(output))
 
+		filterReader = FilterReader(
+			"testcase01", "testcase01", {'maxlines': "5"})
+		filterReader.setBaseDir(TEST_FILES_DIR)
+		filterReader.read()
+		#filterReader.getOptions(["failregex", "ignoreregex"])
+		filterReader.getOptions(None)
+		output[-1][-1] = "5"
+		self.assertEquals(sorted(filterReader.convert()), sorted(output))
+
 class JailsReaderTest(unittest.TestCase):
 
 	def testProvidingBadBasedir(self):

fail2ban/tests/files/filter.d/testcase01.conf

@@ -32,3 +32,7 @@ failregex = ^%(__prefix_line)s(?:error: PAM: )?Authentication failure for .* fro
 # Values:  TEXT
 #
 ignoreregex = ^.+ john from host 192.168.1.1\s*$
+
+[Init]
+# "maxlines" is number of log lines to buffer for multi-line regex searches
+maxlines = 1