Add test for None comparisons

Author: iMichka

unittests/data/null_comparison.hpp

@@ -0,0 +1,20 @@
+#include <iostream>
+using namespace std;
+
+namespace ns{
+    class Test 
+    { 
+        public: 
+        string var;  
+    }; 
+    
+    int TestFunction1(Test a, Test b) 
+    {
+        return 0;
+    }
+
+    int TestFunction2(Test a, Test b=Test()) 
+    {
+        return 0;
+    }
+}

unittests/test_all.py

@@ -82,6 +82,7 @@
 from . import test_order
 from . import test_find_noncopyable_vars
 from . import test_hash
+from . import test_null_comparison
 
 testers = [
     pep8_tester,
@@ -154,7 +155,8 @@
     test_elaborated_types,
     test_order,
     test_find_noncopyable_vars,
-    test_hash
+    test_hash,
+    test_null_comparison,
 ]
 
 if platform.system() != 'Windows':

unittests/test_null_comparison.py

@@ -0,0 +1,48 @@
+# Copyright 2014-2017 Insight Software Consortium.
+# Copyright 2004-2009 Roman Yakovenko.
+# Distributed under the Boost Software License, Version 1.0.
+# See http://www.boost.org/LICENSE_1_0.txt
+
+import unittest
+
+from . import parser_test_case
+
+from pygccxml import parser
+from pygccxml import declarations
+
+
+class Test(parser_test_case.parser_test_case_t):
+
+    def __init__(self, *args):
+        parser_test_case.parser_test_case_t.__init__(self, *args)
+        self.header = "null_comparison.hpp"
+
+    def test_argument_null_comparison(self):
+        """
+        Test for None comparisons with default arguments
+        """
+
+        decls = parser.parse([self.header], self.config)
+        global_ns = declarations.get_global_namespace(decls)
+
+        ns = global_ns.namespace("ns")
+
+        func = ns.free_function(name="TestFunction1")
+        assert (func.arguments[0] > func.arguments[1]) == False
+
+        func = ns.free_function(name="TestFunction2")
+        assert (func.arguments[0] > func.arguments[1]) == False
+
+
+def create_suite():
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(Test))
+    return suite
+
+
+def run_suite():
+    unittest.TextTestRunner(verbosity=2).run(create_suite())
+
+
+if __name__ == "__main__":
+    run_suite()