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RoundingFamily.php
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RoundingFamily.php
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<?php
/**
* This code is licensed under the BSD 3-Clause License.
*
* Copyright (c) 2017-2019, 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\Mutator\Arithmetic;
use Infection\Mutator\Util\Mutator;
use PhpParser\Node;
/**
* @internal
*/
final class RoundingFamily extends Mutator
{
private const MUTATORS_MAP = [
'floor',
'ceil',
'round',
];
/**
* Mutates from one rounding function to all others:
* 1. floor() to ceil() and round()
* 2. ceil() to floor() and round()
* 3. round() to ceil() and floor()
*
* @param Node\Expr\FuncCall|Node $node
*
* @return \Generator
*/
public function mutate(Node $node)
{
$currentFunctionName = $this->getNormalizedFunctionName($node->name);
$mutateToFunctions = array_diff(self::MUTATORS_MAP, [$currentFunctionName]);
foreach ($mutateToFunctions as $functionName) {
yield new Node\Expr\FuncCall(
new Node\Name($functionName),
[$node->args[0]],
$node->getAttributes()
);
}
}
protected function mutatesNode(Node $node): bool
{
if (!$node instanceof Node\Expr\FuncCall) {
return false;
}
if (!$node->name instanceof Node\Name ||
!\in_array($this->getNormalizedFunctionName($node->name), self::MUTATORS_MAP, true)
) {
return false;
}
return true;
}
private function getNormalizedFunctionName(Node\Name $name): string
{
return strtolower((string) $name);
}
}