CONSOLE ERROR: Uncaught this exception is expected CONSOLE ERROR: Uncaught this exception is expected Test exceptions in IDBRequest handlers cause aborts. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". dbname = "exception-in-event-aborts.html" indexedDB.deleteDatabase(dbname) indexedDB.open(dbname) store = db.createObjectStore('storeName', null) store.add({x: 'value', y: 'zzz'}, 'key') trans = db.transaction(['storeName'], 'readwrite') trans.onabort = transactionAborted1 trans.oncomplete = unexpectedCompleteCallback store = trans.objectStore('storeName') store.add({x: 'value2', y: 'zzz2'}, 'key2') event.preventDefault() Throwing PASS Got expected error: 'this exception is expected' PASS The transaction was aborted. trans = db.transaction(['storeName'], 'readwrite') trans.onabort = transactionAborted2 trans.oncomplete = unexpectedCompleteCallback store = trans.objectStore('storeName') store.add({x: 'value', y: 'zzz'}, 'key') event.preventDefault() Throwing PASS Got expected error: 'this exception is expected' PASS The transaction was aborted. trans = db.transaction(['storeName'], 'readwrite') trans.onabort = unexpectedAbortCallback trans.oncomplete = transactionCompleted1 store = trans.objectStore('storeName') store.add({x: 'value3', y: 'zzz3'}, 'key3') event.preventDefault() Throwing within a try block PASS The transaction completed. trans = db.transaction(['storeName'], 'readwrite') trans.onabort = unexpectedAbortCallback trans.oncomplete = transactionCompleted2 store = trans.objectStore('storeName') store.add({x: 'value4', y: 'zzz4'}, 'key4') PASS key4 added PASS The transaction completed. PASS successfullyParsed is true TEST COMPLETE