Test the access method.
public function testAccess() {
$request = new Request(array());
$route = new Route('/test-route', array(), array(
'_access' => 'NULL',
));
$this
->assertNull($this->accessChecker
->access($route, $request));
$route = new Route('/test-route', array(), array(
'_access' => 'FALSE',
));
$this
->assertFalse($this->accessChecker
->access($route, $request));
$route = new Route('/test-route', array(), array(
'_access' => 'TRUE',
));
$this
->assertTrue($this->accessChecker
->access($route, $request));
}