/**
* Invoke all delegates containing in the chain.
* Stops invoking if delegate return a not null result
*
*/
function invoke()
{
$args = func_get_args();
return lmbDelegate::invokeChain($this->delegates, $args);
}
function testInvokeChain()
{
$s1 = new DelegateTestingStub();
$s2 = new DelegateTestingStub();
$s3 = new DelegateTestingStub();
$d1 = new lmbDelegate($s1, 'instanceMethod');
$d2 = new lmbDelegate($s2, 'instanceReturningMethod');
//returns argument
$d3 = new lmbDelegate($s3, 'instanceMethod');
lmbDelegate::invokeChain(array($d1, $d2, $d3), array('bar'));
$this->assertTrue($s1->instance_called);
$this->assertEqual($s1->instance_arg, 'bar');
$this->assertTrue($s2->instance_called);
$this->assertFalse($s3->instance_called);
$this->assertNull($s3->instance_arg);
}
