Revert of Import wpt@357b83b809e3cbc7a1805e7c3ca108a7980d782f

third_party/WebKit/LayoutTests/imported/wpt/IndexedDB/support-promises.js

-// Returns an IndexedDB database name likely to be unique to the test case.
-const databaseName = (testCase) => {
-    return 'db' + self.location.pathname + '-' + testCase.name;
-};
-
-// Creates an EventWatcher covering all the events that can be issued by
-// IndexedDB requests and transactions.
-const requestWatcher = (testCase, request) => {
-    return new EventWatcher(testCase, request,
-        ['error', 'success', 'upgradeneeded']);
-};
-
-// Migrates an IndexedDB database whose name is unique for the test case.
-//
-// newVersion must be greater than the database's current version.
-//
-// migrationCallback will be called during a versionchange transaction and will
-// be given the created database and the versionchange transaction.
-//
-// Returns a promise. If the versionchange transaction goes through, the promise
-// resolves to an IndexedDB database that must be closed by the caller. If the
-// versionchange transaction is aborted, the promise resolves to an error.
-const migrateDatabase = (testCase, newVersion, migrationCallback) => {
-    // We cannot use eventWatcher.wait_for('upgradeneeded') here, because
-    // the versionchange transaction auto-commits before the Promise's then
-    // callback gets called.
-    return new Promise((resolve, reject) => {
-        const request = indexedDB.open(databaseName(testCase), newVersion);
-        request.onupgradeneeded = testCase.step_func(event => {
-            const database = event.target.result;
-            const transaction = event.target.transaction;
-            let abortCalled = false;
-
-            // We wrap IDBTransaction.abort so we can set up the correct event
-            // listeners and expectations if the test chooses to abort the
-            // versionchange transaction.
-            const transactionAbort = transaction.abort.bind(transaction);
-            transaction.abort = () => {
-                request.onerror = event => {
-                    event.preventDefault();
-                    resolve(event);
-                };
-                request.onsuccess = () => reject(new Error(
-                    'indexedDB.open should not succeed after the ' +
-                    'versionchange transaction is aborted'));
-                transactionAbort();
-                abortCalled = true;
-            }
-
-            migrationCallback(database, transaction);
-            if (!abortCalled) {
-                request.onsuccess = null;
-                resolve(requestWatcher(testCase, request).wait_for('success'));
-            }
-        });
-        request.onerror = event => reject(event.target.error);
-        request.onsuccess = () => reject(new Error(
-            'indexedDB.open should not succeed without creating a ' +
-            'versionchange transaction'));
-    }).then(event => event.target.result || event.target.error);
-};
-
-// Creates an IndexedDB database whose name is unique for the test case.
-//
-// setupCallback will be called during a versionchange transaction, and will be
-// given the created database and the versionchange transaction.
-//
-// Returns a promise that resolves to an IndexedDB database. The caller must
-// close the database.
-const createDatabase = (testCase, setupCallback) => {
-    const request = indexedDB.deleteDatabase(databaseName(testCase));
-    const eventWatcher = requestWatcher(testCase, request);
-
-    return eventWatcher.wait_for('success').then(event =>
-        migrateDatabase(testCase, 1, setupCallback));
-};
-
-// Opens an IndexedDB database without performing schema changes.
-//
-// The given version number must match the database's current version.
-//
-// Returns a promise that resolves to an IndexedDB database. The caller must
-// close the database.
-const openDatabase = (testCase, version) => {
-    const request = indexedDB.open(databaseName(testCase), version);
-    const eventWatcher = requestWatcher(testCase, request);
-    return eventWatcher.wait_for('success').then(
-        event => event.target.result);
-}
-
-// The data in the 'books' object store records in the first example of the
-// IndexedDB specification.
-const BOOKS_RECORD_DATA = [
-    { title: 'Quarry Memories', author: 'Fred', isbn: 123456 },
-    { title: 'Water Buffaloes', author: 'Fred', isbn: 234567 },
-    { title: 'Bedrock Nights', author: 'Barney', isbn: 345678 },
-];
-
-// Creates a 'books' object store whose contents closely resembles the first
-// example in the IndexedDB specification.
-const createBooksStore = (testCase, database) => {
-    const store = database.createObjectStore('books',
-        { keyPath: 'isbn', autoIncrement: true });
-    store.createIndex('by_author', 'author');
-    store.createIndex('by_title', 'title', { unique: true });
-    for (let record of BOOKS_RECORD_DATA)
-        store.put(record);
-    return store;
-};
-
-// Creates a 'not_books' object store used to test renaming into existing or
-// deleted store names.
-const createNotBooksStore = (testCase, database) => {
-    const store = database.createObjectStore('not_books');
-    store.createIndex('not_by_author', 'author');
-    store.createIndex('not_by_title', 'title', { unique: true });
-    return store;
-};
-
-// Verifies that an object store's indexes match the indexes used to create the
-// books store in the test database's version 1.
-//
-// The errorMessage is used if the assertions fail. It can state that the
-// IndexedDB implementation being tested is incorrect, or that the testing code
-// is using it incorrectly.
-const checkStoreIndexes = (testCase, store, errorMessage) => {
-    assert_array_equals(
-        store.indexNames, ['by_author', 'by_title'], errorMessage);
-    const authorIndex = store.index('by_author');
-    const titleIndex = store.index('by_title');
-    return Promise.all([
-        checkAuthorIndexContents(testCase, authorIndex, errorMessage),
-        checkTitleIndexContents(testCase, titleIndex, errorMessage),
-    ]);
-};
-
-// Verifies that an object store's key generator is in the same state as the
-// key generator created for the books store in the test database's version 1.
-//
-// The errorMessage is used if the assertions fail. It can state that the
-// IndexedDB implementation being tested is incorrect, or that the testing code
-// is using it incorrectly.
-const checkStoreGenerator = (testCase, store, expectedKey, errorMessage) => {
-    const request = store.put(
-        { title: 'Bedrock Nights ' + expectedKey, author: 'Barney' });
-    const eventWatcher = requestWatcher(testCase, request);
-    return eventWatcher.wait_for('success').then(() => {
-        const result = request.result;
-        assert_equals(result, expectedKey, errorMessage);
-    });
-};
-
-// Verifies that an object store's contents matches the contents used to create
-// the books store in the test database's version 1.
-//
-// The errorMessage is used if the assertions fail. It can state that the
-// IndexedDB implementation being tested is incorrect, or that the testing code
-// is using it incorrectly.
-const checkStoreContents = (testCase, store, errorMessage) => {
-    const request = store.get(123456);
-    const eventWatcher = requestWatcher(testCase, request);
-    return eventWatcher.wait_for('success').then(() => {
-        const result = request.result;
-        assert_equals(result.isbn, BOOKS_RECORD_DATA[0].isbn, errorMessage);
-        assert_equals(result.author, BOOKS_RECORD_DATA[0].author, errorMessage);
-        assert_equals(result.title, BOOKS_RECORD_DATA[0].title, errorMessage);
-    });
-};
-
-// Verifies that index matches the 'by_author' index used to create the
-// by_author books store in the test database's version 1.
-//
-// The errorMessage is used if the assertions fail. It can state that the
-// IndexedDB implementation being tested is incorrect, or that the testing code
-// is using it incorrectly.
-const checkAuthorIndexContents = (testCase, index, errorMessage) => {
-    const request = index.get(BOOKS_RECORD_DATA[2].author);
-    const eventWatcher = requestWatcher(testCase, request);
-    return eventWatcher.wait_for('success').then(() => {
-        const result = request.result;
-        assert_equals(result.isbn, BOOKS_RECORD_DATA[2].isbn, errorMessage);
-        assert_equals(result.title, BOOKS_RECORD_DATA[2].title, errorMessage);
-    });
-};
-
-// Verifies that an index matches the 'by_title' index used to create the books
-// store in the test database's version 1.
-//
-// The errorMessage is used if the assertions fail. It can state that the
-// IndexedDB implementation being tested is incorrect, or that the testing code
-// is using it incorrectly.
-const checkTitleIndexContents = (testCase, index, errorMessage) => {
-    const request = index.get(BOOKS_RECORD_DATA[2].title);
-    const eventWatcher = requestWatcher(testCase, request);
-    return eventWatcher.wait_for('success').then(() => {
-        const result = request.result;
-        assert_equals(result.isbn, BOOKS_RECORD_DATA[2].isbn, errorMessage);
-        assert_equals(result.author, BOOKS_RECORD_DATA[2].author, errorMessage);
-    });
-};