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How to use a fixtureFactory

The FixtureFactory is used to manually create data structures for use with tests. For more information on fixtures see the Fixtures documentation.

In this how to we'll use a FixtureFactory and a custom blue print for giving us a shortcut for creating new objects with information that we need.

namespace App\Test;

use App\Model\MyObject;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\Dev\SapphireTest;

class MyObjectTest extends SapphireTest
    protected FixtureFactory $factory;

    public function __construct()

        $factory = Injector::inst()->create(FixtureFactory::class);

        // Defines a "blueprint" for new objects
        $factory->define(MyObject::class, [
            'MyProperty' => 'My Default Value',

        $this->factory = $factory;

    public function testSomething()
        $MyObjectObj = $this->factory->createObject(
            ['MyOtherProperty' => 'My Custom Value']

        echo $MyObjectObj->MyProperty;
        // returns "My Default Value"

        echo $MyObjectObj->MyOtherProperty;
        // returns "My Custom Value"

Related documentation

API documentation