LoggedUserBuilder example

Author: DanielEScherzer

Zend/tests/friends/example_003.phpt

@@ -0,0 +1,94 @@
+--TEST--
+Friends: RFC example 3 (UserBuilder and LoggedUserBuilder)
+--FILE--
+<?php
+
+class User {
+    friend UserBuilder;
+
+    public protected(set) ?int $userId = null;
+    public protected(set) ?string $username = null;
+
+    // Protected constructor - use the UserBuilder
+    protected function __construct() {}
+}
+
+class UserBuilder {
+
+    public function newWithId(int $userId): User {
+        $u = new User();
+        $u->userId = $userId;
+        return $u;
+    }
+
+    public function newWithName(string $username): User {
+        $u = new User();
+        $u->username = $username;
+        return $u;
+    }
+}
+
+class LoggedUserBuilder extends UserBuilder {
+
+    public function newWithId(int $userId): User {
+        echo "Creating user with id: $userId\n";
+        return parent::newWithId($userId);
+    }
+
+    public function newWithName(string $username): User {
+        echo "Creating user with name: $username\n";
+        return parent::newWithName($username);
+    }
+}
+
+$builder = new UserBuilder();
+
+$alice = $builder->newWithId(1);
+var_dump($alice);
+
+$bob = $builder->newWithName("Bob");
+var_dump($bob);
+
+echo "\n\n----------\n\n";
+
+// LoggedUserBuilder doesn't actually access anything protected, that is all
+// done in the parent:: calls, this works fine
+$loggedBuilder = new LoggedUserBuilder();
+$charlie = $loggedBuilder->newWithId(3);
+var_dump($charlie);
+
+$daniel = $loggedBuilder->newWithName("Daniel");
+var_dump($daniel);
+
+?>
+--EXPECTF--
+object(User)#%d (2) {
+  ["userId"]=>
+  int(1)
+  ["username"]=>
+  NULL
+}
+object(User)#%d (2) {
+  ["userId"]=>
+  NULL
+  ["username"]=>
+  string(3) "Bob"
+}
+
+
+----------
+
+Creating user with id: 3
+object(User)#%d (2) {
+  ["userId"]=>
+  int(3)
+  ["username"]=>
+  NULL
+}
+Creating user with name: Daniel
+object(User)#%d (2) {
+  ["userId"]=>
+  NULL
+  ["username"]=>
+  string(6) "Daniel"
+}