Neos\Flow\Tests\Unit\ResourceManagement\PersistentResourceTest::setFilenameStoresTheFileExtensionInLowerCase PHP Method

    public function setFilenameStoresTheFileExtensionInLowerCase()
    {
        $resource = new PersistentResource();
        $resource->setFilename('Something.Jpeg');
        $this->assertSame('jpeg', $resource->getFileExtension());
        $this->assertSame('Something.jpeg', $resource->getFilename());
    }