xref: /PHP-7.2/ext/spl/tests/observer_001.phpt (revision 17ccbeec) 
1--TEST--
2SPL: SplObserver and SplSubject (empty notify)
3--FILE--
4<?php
5
6class ObserverImpl implements SplObserver
7{
8	protected $name = '';
9
10	function __construct($name = 'obj')
11	{
12		$this->name = '$' . $name;
13	}
14
15	function update(SplSubject $subject)
16	{
17		echo $this->name . '->' . __METHOD__ . '(' . $subject->getName() . ");\n";
18	}
19
20	function getName()
21	{
22		return $this->name;
23	}
24}
25
26class SubjectImpl implements SplSubject
27{
28	protected $name = '';
29	protected $observers = array();
30
31	function __construct($name = 'sub')
32	{
33		$this->name = '$' . $name;
34	}
35
36    function attach(SplObserver $observer)
37    {
38    	echo '$sub->' . __METHOD__ . '(' . $observer->getName() . ");\n";
39    	if (!in_array($observer, $this->observers))
40    	{
41	    	$this->observers[] = $observer;
42	    }
43    }
44
45    function detach(SplObserver $observer)
46    {
47    	echo '$sub->' . __METHOD__ . '(' . $observer->getName() . ");\n";
48    	$idx = array_search($observer, $this->observers);
49    	if ($idx !== false)
50    	{
51    		unset($this->observers[$idx]);
52    	}
53    }
54
55    function notify()
56    {
57    	echo '$sub->' . __METHOD__ . "();\n";
58    	foreach($this->observers as $observer)
59    	{
60    		$observer->update($this);
61    	}
62    }
63
64	function getName()
65	{
66		return $this->name;
67	}
68}
69
70$sub = new SubjectImpl;
71
72$ob1 = new ObserverImpl("ob1");
73$ob2 = new ObserverImpl("ob2");
74$ob3 = new ObserverImpl("ob3");
75
76$sub->attach($ob1);
77$sub->attach($ob1);
78$sub->attach($ob2);
79$sub->attach($ob3);
80
81$sub->notify();
82
83$sub->detach($ob3);
84
85$sub->notify();
86
87$sub->detach($ob2);
88$sub->detach($ob1);
89
90$sub->notify();
91
92$sub->attach($ob3);
93
94$sub->notify();
95?>
96===DONE===
97--EXPECT--
98$sub->SubjectImpl::attach($ob1);
99$sub->SubjectImpl::attach($ob1);
100$sub->SubjectImpl::attach($ob2);
101$sub->SubjectImpl::attach($ob3);
102$sub->SubjectImpl::notify();
103$ob1->ObserverImpl::update($sub);
104$ob2->ObserverImpl::update($sub);
105$ob3->ObserverImpl::update($sub);
106$sub->SubjectImpl::detach($ob3);
107$sub->SubjectImpl::notify();
108$ob1->ObserverImpl::update($sub);
109$ob2->ObserverImpl::update($sub);
110$sub->SubjectImpl::detach($ob2);
111$sub->SubjectImpl::detach($ob1);
112$sub->SubjectImpl::notify();
113$sub->SubjectImpl::attach($ob3);
114$sub->SubjectImpl::notify();
115$ob3->ObserverImpl::update($sub);
116===DONE===
117