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<?php declare(strict_types=1);
/*
* This file is part of PHPUnit.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PHPUnit\Framework\Constraint;
use function abs;
use function get_class;
use function is_array;
use function is_float;
use function is_infinite;
use function is_nan;
use function is_object;
use function is_string;
use function sprintf;
use PHPUnit\Framework\ExpectationFailedException;
use SebastianBergmann\Comparator\ComparisonFailure;
/**
* @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
*/
final class IsIdentical extends Constraint
{
/**
* @var float
*/
private const EPSILON = 0.0000000001;
/**
* @var mixed
*/
private $value;
public function __construct($value)
{
$this->value = $value;
}
/**
* Evaluates the constraint for parameter $other.
*
* If $returnResult is set to false (the default), an exception is thrown
* in case of a failure. null is returned otherwise.
*
* If $returnResult is true, the result of the evaluation is returned as
* a boolean value instead: true in case of success, false in case of a
* failure.
*
* @throws \SebastianBergmann\RecursionContext\InvalidArgumentException
* @throws ExpectationFailedException
*/
public function evaluate($other, string $description = '', bool $returnResult = false): ?bool
{
if (is_float($this->value) && is_float($other) &&
!is_infinite($this->value) && !is_infinite($other) &&
!is_nan($this->value) && !is_nan($other)) {
$success = abs($this->value - $other) < self::EPSILON;
} else {
$success = $this->value === $other;
}
if ($returnResult) {
return $success;
}
if (!$success) {
$f = null;
// if both values are strings, make sure a diff is generated
if (is_string($this->value) && is_string($other)) {
$f = new ComparisonFailure(
$this->value,
$other,
sprintf("'%s'", $this->value),
sprintf("'%s'", $other)
);
}
// if both values are array, make sure a diff is generated
if (is_array($this->value) && is_array($other)) {
$f = new ComparisonFailure(
$this->value,
$other,
$this->exporter()->export($this->value),
$this->exporter()->export($other)
);
}
$this->fail($other, $description, $f);
}
return null;
}
/**
* Returns a string representation of the constraint.
*
* @throws \SebastianBergmann\RecursionContext\InvalidArgumentException
*/
public function toString(): string
{
if (is_object($this->value)) {
return 'is identical to an object of class "' .
get_class($this->value) . '"';
}
return 'is identical to ' . $this->exporter()->export($this->value);
}
/**
* Returns the description of the failure.
*
* The beginning of failure messages is "Failed asserting that" in most
* cases. This method should return the second part of that sentence.
*
* @param mixed $other evaluated value or object
*
* @throws \SebastianBergmann\RecursionContext\InvalidArgumentException
*/
protected function failureDescription($other): string
{
if (is_object($this->value) && is_object($other)) {
return 'two variables reference the same object';
}
if (is_string($this->value) && is_string($other)) {
return 'two strings are identical';
}
if (is_array($this->value) && is_array($other)) {
return 'two arrays are identical';
}
return parent::failureDescription($other);
}
}
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