function test_can_write_settings()
{
$settings = Jetpack_Sync_Settings::get_settings();
foreach (array('dequeue_max_bytes', 'sync_wait_time', 'upload_max_bytes', 'upload_max_rows', 'max_queue_size', 'max_queue_lag', 'disable', 'render_filtered_content') as $key) {
$this->assertTrue(isset($settings[$key]));
}
$settings['dequeue_max_bytes'] = 50;
Jetpack_Sync_Settings::update_settings($settings);
$updated_settings = Jetpack_Sync_Settings::get_settings();
$this->assertSame(50, $updated_settings['dequeue_max_bytes']);
}