/vendor/phpunit/phpunit/src/Framework/Constraint/IsEmpty.php

 1<?php
 2/*
 3 * This file is part of PHPUnit.
 4 *
 5 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 6 *
 7 * For the full copyright and license information, please view the LICENSE
 8 * file that was distributed with this source code.
 9 */
10
11/**
12 * Constraint that checks whether a variable is empty().
13 */
14class PHPUnit_Framework_Constraint_IsEmpty extends PHPUnit_Framework_Constraint
15{
16    /**
17     * Evaluates the constraint for parameter $other. Returns true if the
18     * constraint is met, false otherwise.
19     *
20     * @param mixed $other Value or object to evaluate.
21     *
22     * @return bool
23     */
24    protected function matches($other)
25    {
26        if ($other instanceof Countable) {
27            return count($other) === 0;
28        }
29
30        return empty($other);
31    }
32
33    /**
34     * Returns a string representation of the constraint.
35     *
36     * @return string
37     */
38    public function toString()
39    {
40        return 'is empty';
41    }
42
43    /**
44     * Returns the description of the failure
45     *
46     * The beginning of failure messages is "Failed asserting that" in most
47     * cases. This method should return the second part of that sentence.
48     *
49     * @param mixed $other Evaluated value or object.
50     *
51     * @return string
52     */
53    protected function failureDescription($other)
54    {
55        $type = gettype($other);
56
57        return sprintf(
58            '%s %s %s',
59            $type[0] == 'a' || $type[0] == 'o' ? 'an' : 'a',
60            $type,
61            $this->toString()
62        );
63    }
64}