1 files changed, 21 insertions, 9 deletions

diff --git a/jstests/core/autocomplete.js b/jstests/core/autocomplete.js
index 6eb6e21a7a3..6511292a8d3 100644
--- a/jstests/core/autocomplete.js
+++ b/jstests/core/autocomplete.js
@@ -10,33 +10,45 @@
         return __autocomplete__;
     }
 
-    // Create a collection
+    // Create a collection.
     db.auto_complete_coll.insert({});
 
-    // Validate DB auto completion
+    // Validate DB auto completion.
     const db_stuff = testAutoComplete('db.');
 
-    // Verify we enumerate built-in methods
+    // Verify we enumerate built-in methods.
     assert.contains('db.prototype', db_stuff);
     assert.contains('db.hasOwnProperty', db_stuff);
     assert.contains('db.toString(', db_stuff);
 
-    // Verify we have some methods we added
+    // Verify we have some methods we added.
     assert.contains('db.adminCommand(', db_stuff);
     assert.contains('db.runCommand(', db_stuff);
 
-    // Verify we enumerate collections
+    // Verify we enumerate collections.
     assert.contains('db.auto_complete_coll', db_stuff);
 
-    // Validate Collection autocompletion
+    // Validate Collection autocompletion.
     const coll_stuff = testAutoComplete('db.auto_complete_coll.');
 
-    // Verify we enumerate built-in methods
+    // Verify we enumerate built-in methods.
     assert.contains('db.auto_complete_coll.prototype', coll_stuff);
     assert.contains('db.auto_complete_coll.hasOwnProperty', coll_stuff);
     assert.contains('db.auto_complete_coll.toString(', coll_stuff);
 
-    // Verify we have some methods we added
+    // Verify we have some methods we added.
     assert.contains('db.auto_complete_coll.aggregate(', coll_stuff);
     assert.contains('db.auto_complete_coll.runCommand(', coll_stuff);
-})();
\ No newline at end of file
+
+    // Validate autocompletion when prefix is specified.
+    const empty_stuff = testAutoComplete('');
+
+    assert.contains('Array(', empty_stuff);
+    assert.contains('print(', empty_stuff);
+    assert.contains('ErrorCodes', empty_stuff);
+
+    // Validate autocompletion returns ErrorCodes when ErrorCodes is specified.
+    const error_codes_autocomplete = testAutoComplete('ErrorCodes.');
+
+    assert.contains('ErrorCodes.BadValue', error_codes_autocomplete);
+})();