1 files changed, 29 insertions, 0 deletions
diff --git a/tests/test_overrides.py b/tests/test_overrides.py
index dd2aa6a..e1af1f1 100644
--- a/tests/test_overrides.py
+++ b/tests/test_overrides.py
@@ -4,6 +4,8 @@
 import unittest
 
 import gi.overrides
+import gi.module
+
 try:
     from gi.repository import Regress
     Regress  # pyflakes
@@ -27,3 +29,30 @@ class TestRegistry(unittest.TestCase):
         # Regress override is in tests/gi/overrides, separate from gi/overrides
         # https://bugzilla.gnome.org/show_bug.cgi?id=680913
         self.assertEqual(Regress.REGRESS_OVERRIDE, 42)
+
+
+class TestModule(unittest.TestCase):
+    # Tests for gi.module
+
+    def test_get_introspection_module_caching(self):
+        # This test attempts to minimize side effects by
+        # using a DynamicModule directly instead of going though:
+        # from gi.repository import Foo
+
+        # Clear out introspection module cache before running this test.
+        old_modules = gi.module._introspection_modules
+        gi.module._introspection_modules = {}
+
+        mod_name = 'GIMarshallingTests'
+        mod1 = gi.module.get_introspection_module(mod_name)
+        mod2 = gi.module.get_introspection_module(mod_name)
+        self.assertTrue(mod1 is mod2)
+
+        # Using a DynamicModule will use get_introspection_module internally
+        # in its _load method.
+        mod_overridden = gi.module.DynamicModule(mod_name)
+        mod_overridden._load()
+        self.assertTrue(mod1 is mod_overridden._introspection_module)
+
+        # Restore the previous cache
+        gi.module._introspection_modules = old_modules