Issue #18409: Idle: add unittest for AutoComplete. Patch by Phil Webster.
diff --git a/Lib/idlelib/AutoComplete.py b/Lib/idlelib/AutoComplete.py
index cb38691..1248f00 100644
--- a/Lib/idlelib/AutoComplete.py
+++ b/Lib/idlelib/AutoComplete.py
@@ -222,3 +222,8 @@
         namespace = sys.modules.copy()
         namespace.update(__main__.__dict__)
         return eval(name, namespace)
+
+
+if __name__ == '__main__':
+    from unittest import main
+    main('idlelib.idle_test.test_autocomplete', verbosity=2)