Verify that that cursors weakly hold request, and work if request is GC'd On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB; indexedDB.deleteDatabase(dbname) indexedDB.open(dbname) prepareDatabase(): db = event.target.result store = db.createObjectStore('store') onOpen(): db = event.target.result tx = db.transaction('store') store = tx.objectStore('store') cursorRequest = store.openCursor() otherRequest = store.get(0) openCursorRequestSuccess(): Result will be checked later, to ensure that lazy access is safe otherRequestSuccess(): Verify that the request's result can be accessed lazily: gc() cursor = cursorRequest.result PASS cursor is non-null. PASS cursor.key is "key1" PASS cursor.value is "value1" cursorRequest.extra = 123 cursor.extra = 456 Ensure request is not released if cursor is still around. cursorRequest = null gc() PASS cursorRequestObservation.wasCollected is false cursor.continue() cursor = null gc() PASS cursorObservation.wasCollected is false finalRequest = store.get(0) cursorContinueSuccess(): cursor = event.target.result PASS cursor is non-null. PASS cursor.key is "key2" PASS cursor.value is "value2" PASS event.target.extra is 123 PASS cursor.extra is 456 finalRequestSuccess(): PASS cursor.key is "key2" PASS cursor.value is "value2" cursor = null gc() FAIL cursorRequestObservation.wasCollected should be true. Was false. FAIL cursorObservation.wasCollected should be true. Was false. PASS successfullyParsed is true Some tests failed. TEST COMPLETE