@covers Symfony\Component\DependencyInjection\ParameterBag\ParameterBag::has
public function testHas() {
$bag = new ParameterBag(array(
'foo' => 'bar',
));
$this
->assertTrue($bag
->has('foo'), '->has() returns true if a parameter is defined');
$this
->assertTrue($bag
->has('Foo'), '->has() converts the key to lowercase');
$this
->assertFalse($bag
->has('bar'), '->has() returns false if a parameter is not defined');
}