Evaluation.php
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Evaluation.php
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	<?php
	namespace Eris\Quantifier;

	use Eris\Generator\GeneratedValueSingle;
	use PHPUnit\Framework\AssertionFailedError;

	/**
	* TODO: change namespace. To what?
	*/
	final class Evaluation
	{
	private $assertion;
	private $onFailure;
	private $onSuccess;
	private $values;

	public static function of($assertion)
	{
	return new self($assertion);
	}

	private function __construct($assertion)
	{
	$this->assertion = $assertion;
	$this->onFailure = function () {
	};
	$this->onSuccess = function () {
	};
	}

	public function with(GeneratedValueSingle $values)
	{
	$this->values = $values;
	return $this;
	}

	public function onFailure(callable $action)
	{
	$this->onFailure = $action;
	return $this;
	}

	public function onSuccess(callable $action)
	{
	$this->onSuccess = $action;
	return $this;
	}

	public function execute()
	{
	try {
	call_user_func_array(
	$this->assertion,
	$this->values->unbox()
	);
	} catch (AssertionFailedError $e) {
	call_user_func($this->onFailure, $this->values, $e);
	return;
	}
	call_user_func($this->onSuccess, $this->values);
	}
	}