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67 lines
1.6 KiB
67 lines
1.6 KiB
<?php declare(strict_types=1);
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/*
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* This file is part of PHPUnit.
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*
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* (c) Sebastian Bergmann <sebastian@phpunit.de>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace PHPUnit\Framework\Constraint;
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use function count;
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use function gettype;
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use function sprintf;
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use function str_starts_with;
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use Countable;
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use EmptyIterator;
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/**
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* @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
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*/
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final class IsEmpty extends Constraint
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{
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/**
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* Returns a string representation of the constraint.
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*/
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public function toString(): string
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{
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return 'is empty';
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}
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/**
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* Evaluates the constraint for parameter $other. Returns true if the
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* constraint is met, false otherwise.
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*/
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protected function matches(mixed $other): bool
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{
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if ($other instanceof EmptyIterator) {
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return true;
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}
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if ($other instanceof Countable) {
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return count($other) === 0;
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}
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return empty($other);
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}
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/**
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* Returns the description of the failure.
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*
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* The beginning of failure messages is "Failed asserting that" in most
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* cases. This method should return the second part of that sentence.
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*/
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protected function failureDescription(mixed $other): string
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{
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$type = gettype($other);
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return sprintf(
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'%s %s %s',
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str_starts_with($type, 'a') || str_starts_with($type, 'o') ? 'an' : 'a',
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$type,
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$this->toString(true),
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);
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}
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}
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