@covers Symfony\Component\HttpFoundation\ParameterBag::has
public function testHas() {
$bag = new ParameterBag(array(
'foo' => 'bar',
));
$this
->assertTrue($bag
->has('foo'), '->has() returns true if a parameter is defined');
$this
->assertFalse($bag
->has('unknown'), '->has() return false if a parameter is not defined');
}