xref: /PHP-8.1/ext/spl/tests/observer_002.phpt (revision 75a678a7) 
1--TEST--
2SPL: SplObjectStorage
3--FILE--
4<?php
5
6class MyObjectStorage extends SplObjectStorage
7{
8    function rewind(): void
9    {
10        echo __METHOD__ . "()\n";
11        parent::rewind();
12    }
13
14    function valid(): bool
15    {
16        echo __METHOD__ . "(" . (parent::valid() ? 1 : 0) . ")\n";
17        return parent::valid();
18    }
19
20    function key(): int
21    {
22        echo __METHOD__ . "(" . parent::key() . ")\n";
23        return parent::key();
24    }
25
26    function current(): object
27    {
28        echo __METHOD__ . "(" . parent::current()->getName() . ")\n";
29        return parent::current();
30    }
31
32    function next(): void
33    {
34        echo __METHOD__ . "()\n";
35        parent::next();
36    }
37}
38
39class ObserverImpl implements SplObserver
40{
41    protected $name = '';
42
43    function __construct($name = 'obj')
44    {
45        $this->name = '$' . $name;
46    }
47
48    function update(SplSubject $subject): void
49    {
50        echo $this->name . '->' . __METHOD__ . '(' . $subject->getName() . ");\n";
51    }
52
53    function getName()
54    {
55        return $this->name;
56    }
57}
58
59class SubjectImpl implements SplSubject
60{
61    protected $name = '';
62    protected $observers;
63
64    function __construct($name = 'sub')
65    {
66        $this->observers = new MyObjectStorage;
67        $this->name = '$' . $name;
68    }
69
70    function attach(SplObserver $observer): void
71    {
72        echo $this->name . '->' . __METHOD__ . '(' . $observer->getName() . ");\n";
73        $this->observers->attach($observer);
74    }
75
76    function detach(SplObserver $observer): void
77    {
78        echo $this->name . '->' . __METHOD__ . '(' . $observer->getName() . ");\n";
79        $this->observers->detach($observer);
80    }
81
82    function count(): int
83    {
84        return $this->observers->count();
85    }
86
87    function notify(): void
88    {
89        echo $this->name . '->' . __METHOD__ . "();\n";
90        foreach($this->observers as $key => $observer)
91        {
92            $observer->update($this);
93        }
94    }
95
96    function getName()
97    {
98        return $this->name;
99    }
100
101    function contains($obj)
102    {
103        return $this->observers->contains($obj);
104    }
105}
106
107$sub = new SubjectImpl;
108
109$ob1 = new ObserverImpl("ob1");
110$ob2 = new ObserverImpl("ob2");
111$ob3 = new ObserverImpl("ob3");
112
113var_dump($sub->contains($ob1));
114$sub->attach($ob1);
115var_dump($sub->contains($ob1));
116$sub->attach($ob1);
117$sub->attach($ob2);
118$sub->attach($ob3);
119var_dump($sub->count());
120
121$sub->notify();
122
123$sub->detach($ob3);
124var_dump($sub->count());
125
126$sub->notify();
127
128$sub->detach($ob2);
129$sub->detach($ob1);
130var_dump($sub->count());
131
132$sub->notify();
133
134$sub->attach($ob3);
135var_dump($sub->count());
136
137$sub->notify();
138
139?>
140--EXPECT--
141bool(false)
142$sub->SubjectImpl::attach($ob1);
143bool(true)
144$sub->SubjectImpl::attach($ob1);
145$sub->SubjectImpl::attach($ob2);
146$sub->SubjectImpl::attach($ob3);
147int(3)
148$sub->SubjectImpl::notify();
149MyObjectStorage::rewind()
150MyObjectStorage::valid(1)
151MyObjectStorage::current($ob1)
152MyObjectStorage::key(0)
153$ob1->ObserverImpl::update($sub);
154MyObjectStorage::next()
155MyObjectStorage::valid(1)
156MyObjectStorage::current($ob2)
157MyObjectStorage::key(1)
158$ob2->ObserverImpl::update($sub);
159MyObjectStorage::next()
160MyObjectStorage::valid(1)
161MyObjectStorage::current($ob3)
162MyObjectStorage::key(2)
163$ob3->ObserverImpl::update($sub);
164MyObjectStorage::next()
165MyObjectStorage::valid(0)
166$sub->SubjectImpl::detach($ob3);
167int(2)
168$sub->SubjectImpl::notify();
169MyObjectStorage::rewind()
170MyObjectStorage::valid(1)
171MyObjectStorage::current($ob1)
172MyObjectStorage::key(0)
173$ob1->ObserverImpl::update($sub);
174MyObjectStorage::next()
175MyObjectStorage::valid(1)
176MyObjectStorage::current($ob2)
177MyObjectStorage::key(1)
178$ob2->ObserverImpl::update($sub);
179MyObjectStorage::next()
180MyObjectStorage::valid(0)
181$sub->SubjectImpl::detach($ob2);
182$sub->SubjectImpl::detach($ob1);
183int(0)
184$sub->SubjectImpl::notify();
185MyObjectStorage::rewind()
186MyObjectStorage::valid(0)
187$sub->SubjectImpl::attach($ob3);
188int(1)
189$sub->SubjectImpl::notify();
190MyObjectStorage::rewind()
191MyObjectStorage::valid(1)
192MyObjectStorage::current($ob3)
193MyObjectStorage::key(0)
194$ob3->ObserverImpl::update($sub);
195MyObjectStorage::next()
196MyObjectStorage::valid(0)
197