1 files changed, 32 insertions, 0 deletions
diff --git a/tests/test_cache_invocation.py b/tests/test_cache_invocation.py
new file mode 100644
index 00000000..9d34891d
--- /dev/null
+++ b/tests/test_cache_invocation.py
@@ -0,0 +1,32 @@
+#!/usr/bin/python
+import apt_pkg
+
+import unittest
+
+class TestCache(unittest.TestCase):
+
+    def setUp(self):
+        apt_pkg.init_config()
+        apt_pkg.init_system()
+
+    def test_wrong_invocation(self):
+        """wrongly invoke GetCache() rather than GetDepCache()."""
+        apt_cache = apt_pkg.Cache(apt_pkg.OpProgress())
+        if apt_pkg._COMPAT_0_7:
+            self.assertRaises(ValueError, apt_pkg.Cache, apt_cache)
+            self.assertRaises(ValueError, apt_pkg.Cache,
+                              apt_pkg.AcquireProgress())
+            self.assertRaises(ValueError, apt_pkg.Cache, 0)
+        else:
+            self.assertRaises(TypeError, apt_pkg.Cache, apt_cache)
+            self.assertRaises(TypeError, apt_pkg.Cache,
+                              apt_pkg.AcquireProgress())
+            self.assertRaises(TypeError, apt_pkg.Cache, 0)
+
+    def test_proper_invocation(self):
+        """Invoke it the right way."""
+        apt_cache = apt_pkg.Cache(apt_pkg.OpProgress())
+        apt_depcache = apt_pkg.DepCache(apt_cache)
+
+if __name__ == "__main__":
+    unittest.main()