DecrementIntegerTest.php

<?php
/**
 * This code is licensed under the BSD 3-Clause License.
 *
 * Copyright (c) 2017, Maks Rafalko
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

declare(strict_types=1);

namespace Infection\Tests\Mutator\Number;

use Infection\Tests\Mutator\BaseMutatorTestCase;

final class DecrementIntegerTest extends BaseMutatorTestCase
{
    /**
     * @dataProvider mutationsProvider
     *
     * @param string|string[] $expected
     */
    public function test_it_can_mutate(string $input, $expected = []): void
    {
        $this->doTest($input, $expected);
    }

    public function mutationsProvider(): iterable
    {
        yield 'It does not decrement an integer in a comparison' => [
            <<<'PHP'
<?php

if ($foo < 10) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is being compared as identical with result of count()' => [
            <<<'PHP'
<?php

if (count($a) === 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero with yoda style when it is being compared as identical with result of count()' => [
            <<<'PHP'
<?php

if (0 === count($a)) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero with when it is being compared as identical with result of cOunT()' => [
            <<<'PHP'
<?php

if (cOunT($a) === 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is being compared as identical with result of sizeOf()' => [
            <<<'PHP'
<?php

if (sizeOf($a) === 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is being compared as not identical with result of count()' => [
            <<<'PHP'
<?php

if (count($a) !== 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is compared as equal with result of count()' => [
            <<<'PHP'
<?php

if (count($a) == 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is compared as not equal with result of count()' => [
            <<<'PHP'
<?php

if (count($a) != 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is compared as more than count()' => [
            <<<'PHP'
<?php

if (count($a) > 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is compared as less than count() on the right side' => [
            <<<'PHP'
<?php

if (0 < count($a)) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is compared as less than or equal to count() on the right side' => [
            <<<'PHP'
<?php

if (0 <= count($a)) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is compared as equal to count() on the right side' => [
            <<<'PHP'
<?php

if (0 == count($a)) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does not decrement zero when it is compared as greater than count() on the right side' => [
            <<<'PHP'
<?php

if (0 > count($a)) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement zero when it is compared as more or equal than count()' => [
            <<<'PHP'
<?php

if (count($a) >= 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It doest not decrement zero when it is compared as less than count()' => [
            <<<'PHP'
<?php

if (count($a) < 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It does decrement when compared against a variable function' => [
            <<<'PHP'
<?php

if ($foo === 0) {
    echo 'bar';
}
PHP
            ,
            <<<'PHP'
<?php

if ($foo === -1) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It decrements zero when it is compared any other, not count() function' => [
            <<<'PHP'
<?php

if (abs($a) === 0) {
    echo 'bar';
}
PHP
            ,
            <<<'PHP'
<?php

if (abs($a) === -1) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It doest not decrements zero when it is compared as less or equal than count()' => [
            <<<'PHP'
<?php

if (count($a) <= 0) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It decrements zero' => [
            <<<'PHP'
<?php

$a = 0;
PHP
            ,
            <<<'PHP'
<?php

$a = -1;
PHP
            ,
        ];

        yield 'It increments a negative integer' => [
            <<<'PHP'
<?php

if ($foo === -10) {
    echo 'bar';
}
PHP
            ,
            <<<'PHP'
<?php

if ($foo === -11) {
    echo 'bar';
}
PHP
            ,
        ];

        yield 'It decrements an assignment' => [
            <<<'PHP'
<?php

$foo = 10;
PHP
            ,
            <<<'PHP'
<?php

$foo = 9;
PHP
        ];

        yield 'It decrements an assignment of 0' => [
            <<<'PHP'
<?php

$foo = 0;
PHP
            ,
            <<<'PHP'
<?php

$foo = -1;
PHP
        ];

        yield 'It does not decrement an assignment of 1' => [
            <<<'PHP'
<?php

$foo = 1;
PHP
        ];

        yield 'It does not decrement 1 in greater comparison' => [
            <<<'PHP'
<?php

if ($foo > 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement 1 in greater or equal comparison' => [
            <<<'PHP'
<?php

if ($foo >= 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement 1 in smaller comparison' => [
            <<<'PHP'
<?php

if ($foo < 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement 1 in smaller or equal comparison' => [
            <<<'PHP'
<?php

if ($foo <= 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement 1 in equal comparison' => [
            <<<'PHP'
<?php

if ($foo == 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement 1 in not equal comparison' => [
            <<<'PHP'
<?php

if ($foo != 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement 1 in identical comparison' => [
            <<<'PHP'
<?php

if ($foo === 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement 1 in not identical comparison' => [
            <<<'PHP'
<?php

if ($foo !== 1) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement zero when it is being compared as identical with result of grapheme_strlen()' => [
            <<<'PHP'
<?php

if (grapheme_strlen($a) === 0) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement zero when it is being compared as identical with result of iconv_strlen()' => [
            <<<'PHP'
<?php

if (iconv_strlen($a) === 0) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement zero when it is being compared as identical with result of mb_strlen()' => [
            <<<'PHP'
<?php

if (mb_strlen($a) === 0) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement zero when it is being compared as identical with result of sizeof()' => [
            <<<'PHP'
<?php

if (sizeof($a) === 0) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement zero when it is being compared as identical with result of strlen()' => [
            <<<'PHP'
<?php

if (strlen($a) === 0) {
    echo 'bar';
}
PHP
        ];

        yield 'It does not decrement when it is accessed zero index of an array' => [
            <<<'PHP'
<?php
$b = $a[0];
PHP
        ];

        yield 'It does not decrement limit argument of preg_split function when it equals to 0' => [
            <<<'PHP'
<?php

preg_split('//', 'string', 0);
PHP
        ];

        yield 'It does decrement limit argument of preg_split function when it greater than 0' => [
            <<<'PHP'
<?php

preg_split('//', 'string', 1);
PHP
            ,
            <<<'PHP'
<?php

preg_split('//', 'string', 0);
PHP
        ];

        yield 'It does decrement limit argument of preg_split function when it equal to -1' => [
            <<<'PHP'
<?php

preg_split('//', 'string', -1);
PHP
            ,
            <<<'PHP'
<?php

preg_split('//', 'string', -2);
PHP
        ];
    }
}