Fire window.onerror for uncaught IndexedDB errors

third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer.js

 if (this.importScripts) {
     importScripts('../../../resources/testharness.js');
     importScripts('generic-idb-operations.js');
 }
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'empty transaction';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
 
   openRequest.onupgradeneeded = t.step_func(function() {
       openRequest.result.createObjectStore('store');
   });
   openRequest.onsuccess = t.step_func(function() {
     var db = openRequest.result;
     var tx1 = db.transaction('store', 'readwrite');
     var tx2 = db.transaction('store', 'readwrite');
     obs.observe(db, tx1, {operationTypes: ['put']});
     tx2.objectStore('store').put(1, 1);
     tx1.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 0);
     });
     tx2.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 1);
       t.done();
     });
     tx1.onerror = t.unreached_func('transaction should not fail');
     tx2.onerror = t.unreached_func('transaction should not fail');
   });
 }, 'Registering observe call with empty transaction');
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'observer in version change';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs;
   openRequest.onupgradeneeded = t.step_func(function() {
       openRequest.result.createObjectStore('store');
       obs = new IDBObserver(t.step_func(function(changes) { callback_count++; }));
   });
   openRequest.onsuccess = t.step_func(function() {
     var db = openRequest.result;
     var tx1 = db.transaction('store', 'readwrite');
     var tx2 = db.transaction('store', 'readwrite');
     tx1.objectStore('store').get(1);
     tx2.objectStore('store').put(1, 1);
     obs.observe(db, tx1, { operationTypes: ['put'] });
     tx1.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 0);
     });
     tx2.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 1);
       t.done();
     });
     tx1.onerror = t.unreached_func('transaction should not fail');
     tx2.onerror = t.unreached_func('transaction should not fail');
    });
   }, 'Create IDBObserver during version change');
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'ignore observe call';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
   openRequest.onupgradeneeded = t.step_func(function() {
       var db = openRequest.result;
       db.createObjectStore('store');
       obs.observe(db, openRequest.transaction, { operationTypes: ['put'] });
   });
   openRequest.onsuccess = t.step_func(function() {
     var db = openRequest.result;
     var tx = db.transaction('store', 'readwrite');
     tx.objectStore('store').put(1, 1);
     tx.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 0);
       t.done();
     });
     tx.onerror = t.unreached_func('transaction should not fail');
   });
 }, 'Observe call during version change ignored');
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'abort associated transaction';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
   openRequest.onupgradeneeded = t.step_func(function() {
     openRequest.result.createObjectStore('store');
   });
   openRequest.onsuccess = t.step_func(function() {
     var db = openRequest.result;
+
+    // Prevent propagation to global error handler.
+    db.onerror = e => { e.preventDefault(); };
+
     var tx1 = db.transaction('store', 'readwrite');
     var tx2 = db.transaction('store', 'readwrite');
     tx1.objectStore('store').get(1);
     tx2.objectStore('store').put(1, 1);
     obs.observe(db, tx1, { operationTypes: ['put'] });
     tx1.abort();
 
     tx1.onabort = t.step_func(function(){
       countCallbacks(callback_count, 0);
     });
     tx1.oncomplete = t.unreached_func('transaction should not complete');
     tx2.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 0);
       t.done();
     });
     tx2.onerror = t.unreached_func('transaction error should not fail');
   });
 }, 'Abort transaction associated with observer');
 
 async_test(function(t) {
   var dbname = location.pathname + ' - ' + 'abort transaction';
+  indexedDB.deleteDatabase(dbname);
   var openRequest = indexedDB.open(dbname);
   var callback_count = 0;
   var obs = new IDBObserver(t.step_func(function() { callback_count++; }));
   openRequest.onupgradeneeded = t.step_func(function() {
     openRequest.result.createObjectStore('store');
   });
   openRequest.onsuccess = t.step_func(function() {
     var db = openRequest.result;
+
+    // Prevent propagation to global error handler.
+    db.onerror = e => { e.preventDefault(); };
+
     var tx1 = db.transaction('store', 'readwrite');
     var tx2 = db.transaction('store', 'readwrite');
     var tx3 = db.transaction('store', 'readwrite');
     tx1.objectStore('store').get(1);
     tx2.objectStore('store').put(1, 1);
     tx3.objectStore('store').put(1, 1);
     obs.observe(db, tx1, { operationTypes: ['put'] });
     tx2.abort();
     tx1.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 0);
     });
     tx2.oncomplete = t.unreached_func('transaction should not complete');
     tx2.onabort = t.step_func(function() {
       countCallbacks(callback_count, 0);
     });
     tx3.oncomplete = t.step_func(function() {
       countCallbacks(callback_count, 1);
       t.done();
     });
     tx1.onerror = t.unreached_func('transaction should not fail');
     tx3.onerror = t.unreached_func('transaction should not fail');
   });
 }, 'Abort transaction recorded by observer');
 
-done();
+done();