public function testGetRequestFormat() {
$request = new Request();
$this
->assertEquals('html', $request
->getRequestFormat());
$request = new Request();
$this
->assertNull($request
->getRequestFormat(null));
$request = new Request();
$this
->assertNull($request
->setRequestFormat('foo'));
$this
->assertEquals('foo', $request
->getRequestFormat(null));
}