Tests importing an updated field instance.
function testImportChange() {
$field_id = 'field_test_import';
$instance_id = "test_entity.test_bundle.{$field_id}";
$instance_config_name = "field.instance.{$instance_id}";
// Import default config.
$this
->installConfig(array(
'field_test_config',
));
$active = $this->container
->get('config.storage');
$staging = $this->container
->get('config.storage.staging');
$this
->copyConfig($active, $staging);
// Save as files in the the staging directory.
$instance = $active
->read($instance_config_name);
$new_label = 'Test update import field';
$instance['label'] = $new_label;
$staging
->write($instance_config_name, $instance);
// Import the content of the staging directory.
$this
->configImporter()
->import();
// Check that the updated config was correctly imported.
$instance = entity_load('field_instance', $instance_id);
$this
->assertEqual($instance['label'], $new_label, 'Instance label updated');
}