Set the default field storage backend for fields created during tests.
Overrides DrupalWebTestCase::setUp
function setUp() {
// Since this is a base class for many test cases, support the same
// flexibility that DrupalWebTestCase::setUp() has for the modules to be
// passed in as either an array or a variable number of string arguments.
$modules = func_get_args();
if (isset($modules[0]) && is_array($modules[0])) {
$modules = $modules[0];
}
parent::setUp($modules);
// Set default storage backend.
variable_set('field_storage_default', $this->default_storage);
}