Add basic directory_cache test

This class was not tested at all. At least now the cache mechanism
is run in it’s most basic form.

Author: iMichka

unittests/test_all.py

@@ -74,6 +74,7 @@
 import test_smart_pointer
 import test_pattern_parser
 import test_function_pointer
+import test_directory_cache
 
 testers = [
     # , demangled_tester # failing right now
@@ -140,7 +141,8 @@
     test_argument_without_name,
     test_smart_pointer,
     test_pattern_parser,
-    test_function_pointer
+    test_function_pointer,
+    test_directory_cache
 ]
 
 if 'posix' in os.name:

unittests/test_directory_cache.py

@@ -0,0 +1,42 @@
+# Copyright 2014-2016 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
+import parser_test_case
+
+from pygccxml import parser
+
+
+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 = "core_cache.hpp"
+
+    def test_elaborated_types(self):
+        """
+        Test the directory cache
+
+        """
+
+        cache = parser.directory_cache_t(
+            directory="unittests/data/directory_cache_test")
+        # Generate a cache on first read
+        parser.parse([self.header], self.config, cache=cache)
+        # Read from the cache the second time
+        parser.parse([self.header], self.config, cache=cache)
+
+
+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()