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<?php
namespace SilverStripe\Forms\Tests;
use SilverStripe\Dev\SapphireTest;
use SilverStripe\Forms\CheckboxField_Readonly;
class CheckboxFieldReadonlyTest extends SapphireTest
{
public function testPerformReadonlyTransformation()
$field = new CheckboxField_Readonly('Test');
$result = $field->performReadonlyTransformation();
$this->assertInstanceOf(CheckboxField_Readonly::class, $result);
$this->assertNotSame($result, $field);
}