<?php
/*
* This file is part of sebastian/comparator.
*
* (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 SebastianBergmann\Comparator;

/**
* Compares scalar or NULL values for equality.
*/
class ScalarComparator extends Comparator
{
/**
* Returns whether the comparator can compare two values.
*
* @param mixed $expected The first value to compare
* @param mixed $actual The second value to compare
*
* @return bool
*
* @since Method available since Release 3.6.0
*/
public function accepts($expected, $actual)
{
return ((\is_scalar($expected) xor null === $expected) &&
(\is_scalar($actual) xor null === $actual))
// allow comparison between strings and objects featuring __toString()
|| (\is_string($expected) && \is_object($actual) && \method_exists($actual, '__toString'))
|| (\is_object($expected) && \method_exists($expected, '__toString') && \is_string($actual));
}

/**
* Asserts that two values are equal.
*
* @param mixed $expected First value to compare
* @param mixed $actual Second value to compare
* @param float $delta Allowed numerical distance between two values to consider them equal
* @param bool $canonicalize Arrays are sorted before comparison when set to true
* @param bool $ignoreCase Case is ignored when set to true
*
* @throws ComparisonFailure
*/
public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
{
$expectedToCompare = $expected;
$actualToCompare = $actual;

// always compare as strings to avoid strange behaviour
// otherwise 0 == 'Foobar'
if (\is_string($expected) || \is_string($actual)) {
$expectedToCompare = (string) $expectedToCompare;
$actualToCompare = (string) $actualToCompare;

if ($ignoreCase) {
$expectedToCompare = \strtolower($expectedToCompare);
$actualToCompare = \strtolower($actualToCompare);
}
}

if ($expectedToCompare != $actualToCompare) {
if (\is_string($expected) && \is_string($actual)) {
throw new ComparisonFailure(
$expected,
$actual,
$this->exporter->export($expected),
$this->exporter->export($actual),
false,
'Failed asserting that two strings are equal.'
);
}

throw new ComparisonFailure(
$expected,
$actual,
// no diff is required
'',
'',
false,
\sprintf(
'Failed asserting that %s matches expected %s.',
$this->exporter->export($actual),
$this->exporter->export($expected)
)
);
}
}
}