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<title>IndexedDB: index renaming support</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 => {
    let authorIndex = null, authorIndex2 = null;
    let renamedAuthorIndex = null, renamedAuthorIndex2 = null;
    return createDatabase(testCase, (database, transaction) => {
        const store = createBooksStore(testCase, database);
        authorIndex = store.index('by_author');
    }).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'Test setup should have created two indexes');
        authorIndex2 = store.index('by_author');
        return checkAuthorIndexContents(
            testCase, authorIndex2,
            'The index should have the expected contents before any renaming').
            then(() => database.close());
    }).then(() => migrateDatabase(testCase, 2, (database, transaction) => {
        const store = transaction.objectStore('books');
        renamedAuthorIndex = store.index('by_author');
        renamedAuthorIndex.name = 'renamed_by_author';

        assert_equals(
            renamedAuthorIndex.name, 'renamed_by_author',
            'IDBIndex name should change immediately after a rename');
        assert_array_equals(
            store.indexNames, ['by_title', 'renamed_by_author'],
            'IDBObjectStore.indexNames should immediately reflect the rename');
        assert_equals(
            store.index('renamed_by_author'), renamedAuthorIndex,
            'IDBObjectStore.index should return the renamed index store when ' +
            'queried using the new name immediately after the rename');
        assert_throws_dom(
            'NotFoundError', () => store.index('by_author'),
            'IDBObjectStore.index should throw when queried using the ' +
            "renamed index's old name immediately after the rename");
    })).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_title', 'renamed_by_author'],
            'IDBObjectStore.indexNames should still reflect the rename after ' +
            'the versionchange transaction commits');
        renamedAuthorIndex2 = store.index('renamed_by_author');
        return checkAuthorIndexContents(
            testCase, renamedAuthorIndex2,
            'Renaming an index should not change its contents').then(
            () => database.close());
    }).then(() => {
        assert_equals(
            authorIndex.name, 'by_author',
            'IDBIndex obtained before the rename transaction should not ' +
            'reflect the rename');
        assert_equals(
            authorIndex2.name, 'by_author',
            'IDBIndex obtained before the rename transaction should not ' +
            'reflect the rename');
        assert_equals(
            renamedAuthorIndex.name, 'renamed_by_author',
            'IDBIndex used in the rename transaction should keep reflecting ' +
            'the new name after the transaction is committed');
        assert_equals(
            renamedAuthorIndex2.name, 'renamed_by_author',
            'IDBIndex obtained after the rename transaction should reflect ' +
            'the new name');
    });
}, 'IndexedDB index rename in new transaction');

promise_test(testCase => {
    let renamedAuthorIndex = null, renamedAuthorIndex2 = null;
    return createDatabase(testCase, (database, transaction) => {
        const store = createBooksStore(testCase, database);
        renamedAuthorIndex = store.index('by_author');
        renamedAuthorIndex.name = 'renamed_by_author';

        assert_equals(
            renamedAuthorIndex.name, 'renamed_by_author',
            'IDBIndex name should change immediately after a rename');
        assert_array_equals(
            store.indexNames, ['by_title', 'renamed_by_author'],
            'IDBObjectStore.indexNames should immediately reflect the rename');
        assert_equals(
            store.index('renamed_by_author'), renamedAuthorIndex,
            'IDBObjectStore.index should return the renamed index store when ' +
            'queried using the new name immediately after the rename');
        assert_throws_dom(
            'NotFoundError', () => store.index('by_author'),
            'IDBObjectStore.index should throw when queried using the ' +
            "renamed index's old name immediately after the rename");
    }).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_title', 'renamed_by_author'],
            'IDBObjectStore.indexNames should still reflect the rename after ' +
            'the versionchange transaction commits');
        renamedAuthorIndex2 = store.index('renamed_by_author');
        return checkAuthorIndexContents(
            testCase, renamedAuthorIndex2,
            'Renaming an index should not change its contents').then(
            () => database.close());
    }).then(() => {
        assert_equals(
            renamedAuthorIndex.name, 'renamed_by_author',
            'IDBIndex used in the rename transaction should keep reflecting ' +
            'the new name after the transaction is committed');
        assert_equals(
            renamedAuthorIndex2.name, 'renamed_by_author',
            'IDBIndex obtained after the rename transaction should reflect ' +
            'the new name');
    });
}, 'IndexedDB index rename in the transaction where it is created');

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');
        index.name = 'by_author';
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'Renaming an index to the same name 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 that renames a store to the same name ' +
            "should not change the index's IDBObjectStore.indexNames");
        const index = store.index('by_author');
        return checkAuthorIndexContents(
            testCase, index,
            'Committing a transaction that renames an index to the same name ' +
            "should not change the index's contents").then(
            () => database.close());
    });
}, 'IndexedDB index rename to the same name succeeds');

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_title');
        index.name = 'by_title';
        assert_array_equals(
            store.indexNames, ['by_title'],
            'IDBObjectStore.indexNames should immediately reflect the rename');
    })).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_title'],
            'IDBObjectStore.indexNames should still reflect the rename after ' +
            'the versionchange transaction commits');
        const index = store.index('by_title');
        return checkAuthorIndexContents(
            testCase, index,
            'Renaming an index should not change its contents').then(
            () => database.close());
    });
}, 'IndexedDB index rename to the name of a deleted index succeeds');

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');
        store.index('by_author').name = 'tmp';
        store.index('by_title').name = 'by_author';
        store.index('tmp').name = 'by_title';
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'IDBObjectStore.indexNames should reflect the swap immediately ' +
            'after the renames');
        return checkTitleIndexContents(
            testCase, store.index('by_author'),
            'Renaming an index should not change its contents');
    })).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_author', 'by_title'],
            'IDBObjectStore.indexNames should still reflect the swap after ' +
            'the versionchange transaction commits');
        const index = store.index('by_title');
        return checkAuthorIndexContents(
            testCase, index,
            'Renaming an index should not change its contents').then(
            () => database.close());
    });
}, 'IndexedDB index swapping via renames succeeds');

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');

        index.name = 42;
        assert_equals(index.name, '42',
            'IDBIndex name should change immediately after a rename to a ' +
            'number');
        assert_array_equals(
            store.indexNames, ['42', 'by_title'],
            'IDBObjectStore.indexNames should immediately reflect the ' +
            'stringifying rename');

        index.name = true;
        assert_equals(index.name, 'true',
            'IDBIndex name should change immediately after a rename to a ' +
            'boolean');

        index.name = {};
        assert_equals(index.name, '[object Object]',
            'IDBIndex name should change immediately after a rename to an ' +
            'object');

        index.name = () => null;
        assert_equals(index.name, '() => null',
            'IDBIndex name should change immediately after a rename to a ' +
            'function');

        index.name = undefined;
        assert_equals(index.name, 'undefined',
            'IDBIndex name should change immediately after a rename to ' +
            'undefined');
    })).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, ['by_title', 'undefined'],
            'IDBObjectStore.indexNames should reflect the last rename ' +
            'after the versionchange transaction commits');
        const index = store.index('undefined');
        return checkAuthorIndexContents(
            testCase, index,
            'Renaming an index should not change its contents').then(
            () => database.close());
    });
}, 'IndexedDB index rename stringifies non-string names');

for (let escapedName of ['', '\\u0000', '\\uDC00\\uD800']) ((escapedName) => {
  const name = JSON.parse('"' + escapedName + '"');
  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');

        index.name = name;
        assert_equals(index.name, name,
            'IDBIndex name should change immediately after the rename');
        assert_array_equals(
            store.indexNames, [name, 'by_title'].sort(),
            'IDBObjectStore.indexNames should immediately reflect the rename');
    })).then(database => {
        const transaction = database.transaction('books', 'readonly');
        const store = transaction.objectStore('books');
        assert_array_equals(
            store.indexNames, [name, 'by_title'].sort(),
            'IDBObjectStore.indexNames should reflect the rename ' +
            'after the versionchange transaction commits');
        const index = store.index(name);
        return checkAuthorIndexContents(
            testCase, index,
            'Renaming an index should not change its contents').then(
            () => database.close());
    });
  }, 'IndexedDB index can be renamed to "' + escapedName + '"');
})(escapedName);

</script>
