mozilla-central/testing/web-platform/tests/IndexedDB/idbcursor-iterating-update.any.js (file symbol)

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// META: global=window,worker
// META: title=IndexedDB: Index iteration with cursor updates/deletes
// META: script=resources/support.js
'use strict';
const objStoreValues = [
{name: 'foo', id: 1},
{name: 'bar', id: 2},
{name: 'foo', id: 3},
{name: 'bar', id: 4},
];
const objStoreValuesByIndex = [
objStoreValues[1],
objStoreValues[3],
objStoreValues[0],
objStoreValues[2],
];
const functionsThatShouldNotAffectIteration = [
(cursor) => cursor.update({}),
(cursor) => cursor.delete(),
];
functionsThatShouldNotAffectIteration.forEach(
(func) => indexeddb_test(
(t, db) => {
const objStore = db.createObjectStore('items', {autoIncrement: true});
objStore.createIndex('name', 'name', {unique: false});
objStoreValues.forEach((value) => objStore.add(value));
},
(t, db) => {
const txn = db.transaction('items', 'readwrite');
const objStore = txn.objectStore('items');
const nameIndex = objStore.index('name');
const cursorValues = [];
nameIndex.openCursor().onsuccess = (evt) => {
const cursor = evt.target.result;
if (cursor) {
func(cursor);
cursorValues.push(cursor.value);
cursor.continue();
} else {
assert_equals(
cursorValues.length, 4,
`Cursor should iterate over 4 records`);
cursorValues.forEach((value, i) => {
assert_object_equals(value, objStoreValuesByIndex[i]);
});
t.done();
}
};
},
`Calling ${func} doesn't affect index iteration`));