Online PHP editor | output for DN0de

<?php class ImmutableObject { private $property; public function __construct($property) { $this->property = $property; } public function withProperty($property) { $clone = clone($this); $clone->property = $property; return $clone; } public function getProperty() { return $this->property; } } class BrokenImmutableObject { private $property; public function __construct($property) { $this->property = $property; } public function withProperty($property) { if ($property == $this->property) { return $this; } $clone = clone($this); $clone->property = $property; return $clone; } public function getProperty() { return $this->property; } } function it($m,$p){echo ($p?'✔︎':'✘')." It $m\n"; if(!$p){$GLOBALS['f']=1;}}function done(){if(@$GLOBALS['f'])die(1);} foreach (array('ImmutableObject', 'BrokenImmutableObject') as $class) { print "\n".$class."\n".str_repeat('=', strlen($class))."\n\n"; // Expectation, $start will always have value 'start' $start = new $class('start'); // Expectation, $next is an immutable copy of $start with value 'start' $next = $start->withProperty('start'); // Expectation, $end is an immutable copy of $start with value 'end' $end = $start->withProperty('end'); it('has the value "start" (has value "'.$start->getProperty().'")', 'start' === $start->getProperty()); it('has the value "start" (has value "'.$next->getProperty().'")', 'start' === $next->getProperty()); it('has the value "end" (has value "'.$end->getProperty().'")', 'end' === $end->getProperty()); print "\n"; }