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<title>IndexedDB: index renaming error handling</title>
<link rel="help"
      href="https://w3c.github.io/IndexedDB/#dom-idbindex-name">
<link rel="author" href="pwnall@chromium.org" title="Victor Costan">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/support-promises.js"></script>
<script>
'use strict';

promise_test(testCase => {
    return createDatabase(testCase, (database, transaction) => {
        createBooksStore(testCase, database);
    }).then(database => {
        database.close();
    }).then(() => migrateDatabase(testCase, 2, (database, transaction) => {
        const store = transaction.objectStore('books');
        const index = store.index('by_author');
        store.deleteIndex('by_author');
        assert_throws_dom(
            'InvalidStateError', () => index.name = 'renamed_by_author');
    })).then(database => database.close());
}, 'IndexedDB deleted index rename throws');

promise_test(testCase => {
    return createDatabase(testCase, (database, transaction) => {
        createBooksStore(testCase, database);
    }).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        const index = store.index('by_author');

        assert_throws_dom(
            'InvalidStateError', () => index.name = 'renamed_by_author');
        database.close();
    });
}, 'IndexedDB index rename throws in a readonly transaction');

promise_test(testCase => {
    return createDatabase(testCase, (database, transaction) => {
        createBooksStore(testCase, database);
    }).then(database => {
        const transaction = database.transaction('books', 'readwrite');
        const store = transaction.objectStore('books');
        const index = store.index('by_author');

        assert_throws_dom(
            'InvalidStateError', () => index.name = 'renamed_by_author');
        database.close();
    });
}, 'IndexedDB index rename throws in a readwrite transaction');

promise_test(testCase => {
    let authorIndex = null;
    return createDatabase(testCase, (database, transaction) => {
        const store = createBooksStore(testCase, database);
        authorIndex = store.index('by_author');
    }).then(database => {
        assert_throws_dom(
            'TransactionInactiveError',
            () => authorIndex.name = 'renamed_by_author');
        database.close();
    });
}, 'IndexedDB index rename throws in an inactive transaction');

promise_test(testCase => {
    return createDatabase(testCase, (database, transaction) => {
        createBooksStore(testCase, database);
    }).then(database => {
        database.close();
    }).then(() => migrateDatabase(testCase, 2, (database, transaction) => {
        const store = transaction.objectStore('books');
        const index = store.index('by_author');

        assert_throws_dom('ConstraintError', () => index.name = 'by_title');
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'An index rename that throws an exception should not change the ' +
            "index's IDBObjectStore.indexNames");
    })).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'Committing a transaction with a failed store rename attempt ' +
            "should not change the index's IDBObjectStore.indexNames");
        const index = store.index('by_author');
        return checkAuthorIndexContents(
            testCase, index,
            'Committing a transaction with a failed rename attempt should ' +
            "not change the index's contents").then(() => database.close());
    });
}, 'IndexedDB index rename to the name of another index throws');

promise_test(testCase => {
    return createDatabase(testCase, (database, transaction) => {
        createBooksStore(testCase, database);
    }).then(database => {
        database.close();
    }).then(() => migrateDatabase(testCase, 2, (database, transaction) => {
        const store = transaction.objectStore('books');
        const index = store.index('by_author');
        const exception = { name: 'Custom stringifying error' };
        assert_throws_exactly(
            exception,
            () => {
              index.name = {
                toString: () => { throw exception; }
              };
            }, 'IDBObjectStore rename should re-raise toString() exception');
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'An index rename that throws an exception should not change the ' +
            "index's IDBObjectStore.indexNames");
    })).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'Committing a transaction with a failed store rename attempt ' +
            "should not change the index's IDBObjectStore.indexNames");
        const index = store.index('by_author');
        return checkAuthorIndexContents(
            testCase, index,
            'Committing a transaction with a failed rename attempt should ' +
            "not change the index's contents").then(() => database.close());
    });
}, 'IndexedDB index rename handles exceptions when stringifying names');

</script>
