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<?php
namespace Hamcrest\Core;
/*
Copyright (c) 2009 hamcrest.org
*/
use Hamcrest\Description;
use Hamcrest\DiagnosingMatcher;
/**
* Tests whether the value is an instance of a class.
*/
class IsInstanceOf extends DiagnosingMatcher
{
private $_theClass;
/**
* Creates a new instance of IsInstanceOf
*
* @param string $theClass
* The predicate evaluates to true for instances of this class
* or one of its subclasses.
*/
public function __construct($theClass)
{
$this->_theClass = $theClass;
}
protected function matchesWithDiagnosticDescription($item, Description $mismatchDescription)
{
if (!is_object($item)) {
$mismatchDescription->appendText('was ')->appendValue($item);
return false;
}
if (!($item instanceof $this->_theClass)) {
$mismatchDescription->appendText('[' . get_class($item) . '] ')
->appendValue($item);
return false;
}
return true;
}
public function describeTo(Description $description)
{
$description->appendText('an instance of ')
->appendText($this->_theClass)
;
}
/**
* Is the value an instance of a particular type?
* This version assumes no relationship between the required type and
* the signature of the method that sets it up, for example in
* <code>assertThat($anObject, anInstanceOf('Thing'));</code>
*
* @factory any
*/
public static function anInstanceOf($theClass)
{
return new self($theClass);
}
}
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