michael@0: /**
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/
michael@0:  */
michael@0: "use strict";
michael@0: 
michael@0: var self = this;
michael@0: 
michael@0: var testGenerator = testSteps();
michael@0: 
michael@0: function testSteps()
michael@0: {
michael@0:   const dbName = self.window ?
michael@0:                  window.location.pathname :
michael@0:                  "test_transaction_abort_hang";
michael@0:   const objStoreName = "foo";
michael@0:   const transactionCount = 30;
michael@0: 
michael@0:   let completedTransactionCount = 0;
michael@0:   let caughtError = false;
michael@0: 
michael@0:   let abortedTransactionIndex = Math.floor(transactionCount / 2);
michael@0:   if (abortedTransactionIndex % 2 == 0) {
michael@0:     abortedTransactionIndex++;
michael@0:   }
michael@0: 
michael@0:   let request = indexedDB.open(dbName, 1);
michael@0:   request.onerror = errorHandler;
michael@0:   request.onupgradeneeded = grabEventAndContinueHandler;
michael@0:   let event = yield undefined;
michael@0: 
michael@0:   request.result.createObjectStore(objStoreName, { autoIncrement: true });
michael@0: 
michael@0:   request.onupgradeneeded = null;
michael@0:   request.onsuccess = grabEventAndContinueHandler;
michael@0:   event = yield undefined;
michael@0: 
michael@0:   let db = event.target.result;
michael@0: 
michael@0:   for (let i = 0; i < transactionCount; i++) {
michael@0:     const readonly = i % 2 == 0;
michael@0:     const mode = readonly ? "readonly" : "readwrite";
michael@0: 
michael@0:     let transaction = db.transaction(objStoreName, mode);
michael@0: 
michael@0:     if (i == transactionCount - 1) {
michael@0:       // Last one, finish the test.
michael@0:       transaction.oncomplete = grabEventAndContinueHandler;
michael@0:     } else if (i == abortedTransactionIndex - 1) {
michael@0:       transaction.oncomplete = function(event) {
michael@0:         ok(true, "Completed transaction " + ++completedTransactionCount +
michael@0:            " (We may hang after this!)");
michael@0:       };
michael@0:     } else if (i == abortedTransactionIndex) {
michael@0:       // Special transaction that we abort outside the normal event flow.
michael@0:       transaction.onerror = function(event) {
michael@0:         ok(true, "Aborted transaction " + ++completedTransactionCount +
michael@0:            " (We didn't hang!)");
michael@0:         is(event.target.error.name, "AbortError",
michael@0:            "AbortError set as the error on the request");
michael@0:         is(event.target.transaction.error, null,
michael@0:            "No error set on the transaction");
michael@0:         ok(!caughtError, "Haven't seen the error event yet");
michael@0:         caughtError = true;
michael@0:         event.preventDefault();
michael@0:       };
michael@0:       // This has to happen after the we return to the event loop but before the
michael@0:       // transaction starts running.
michael@0:       executeSoon(function() { transaction.abort(); });
michael@0:     } else {
michael@0:       transaction.oncomplete = function(event) {
michael@0:         ok(true, "Completed transaction " + ++completedTransactionCount);
michael@0:       };
michael@0:     }
michael@0: 
michael@0:     if (readonly) {
michael@0:       transaction.objectStore(objStoreName).get(0);
michael@0:     } else {
michael@0:       try { transaction.objectStore(objStoreName).add({}); } catch(e) { }
michael@0:     }
michael@0:   }
michael@0:   ok(true, "Created all transactions");
michael@0: 
michael@0:   event = yield undefined;
michael@0: 
michael@0:   ok(true, "Completed transaction " + ++completedTransactionCount);
michael@0:   ok(caughtError, "Caught the error event when we aborted the transaction");
michael@0: 
michael@0:   finishTest();
michael@0:   yield undefined;
michael@0: }