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<?php
namespace Hamcrest;
/*
Copyright (c) 2009 hamcrest.org
*/
/**
* Supporting class for matching a feature of an object. Implement
* <code>featureValueOf()</code> in a subclass to pull out the feature to be
* matched against.
*/
abstract class FeatureMatcher extends TypeSafeDiagnosingMatcher
{
private $_subMatcher;
private $_featureDescription;
private $_featureName;
/**
* Constructor.
*
* @param string $type
* @param string $subtype
* @param \Hamcrest\Matcher $subMatcher The matcher to apply to the feature
* @param string $featureDescription Descriptive text to use in describeTo
* @param string $featureName Identifying text for mismatch message
*/
public function __construct($type, $subtype, Matcher $subMatcher, $featureDescription, $featureName)
{
parent::__construct($type, $subtype);
$this->_subMatcher = $subMatcher;
$this->_featureDescription = $featureDescription;
$this->_featureName = $featureName;
}
/**
* Implement this to extract the interesting feature.
*
* @param mixed $actual the target object
*
* @return mixed the feature to be matched
*/
abstract protected function featureValueOf($actual);
public function matchesSafelyWithDiagnosticDescription($actual, Description $mismatchDescription)
{
$featureValue = $this->featureValueOf($actual);
if (!$this->_subMatcher->matches($featureValue)) {
$mismatchDescription->appendText($this->_featureName)
->appendText(' was ')->appendValue($featureValue);
return false;
}
return true;
}
final public function describeTo(Description $description)
{
$description->appendText($this->_featureDescription)->appendText(' ')
->appendDescriptionOf($this->_subMatcher)
;
}
}
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