<?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 objects for equality.
*/
class ObjectComparator extends ArrayComparator
{
/**
* Returns whether the comparator can compare two values.
*
* @param mixed $expected The first value to compare
* @param mixed $actual The second value to compare
*
* @return bool
*/
public function accepts($expected, $actual)
{
return \is_object($expected) && \is_object($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
* @param array $processed List of already processed elements (used to prevent infinite recursion)
*
* @throws ComparisonFailure
*/
public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = false, $ignoreCase = false, array &$processed = [])
{
if (\get_class($actual) !== \get_class($expected)) {
throw new ComparisonFailure(
$expected,
$actual,
$this->exporter->export($expected),
$this->exporter->export($actual),
false,
\sprintf(
'%s is not instance of expected class "%s".',
$this->exporter->export($actual),
\get_class($expected)
)
);
}

// don't compare twice to allow for cyclic dependencies
if (\in_array([$actual, $expected], $processed, true) ||
\in_array([$expected, $actual], $processed, true)) {
return;
}

$processed[] = [$actual, $expected];

// don't compare objects if they are identical
// this helps to avoid the error "maximum function nesting level reached"
// CAUTION: this conditional clause is not tested
if ($actual !== $expected) {
try {
parent::assertEquals(
$this->toArray($expected),
$this->toArray($actual),
$delta,
$canonicalize,
$ignoreCase,
$processed
);
} catch (ComparisonFailure $e) {
throw new ComparisonFailure(
$expected,
$actual,
// replace "Array" with "MyClass object"
\substr_replace($e->getExpectedAsString(), \get_class($expected) . ' Object', 0, 5),
\substr_replace($e->getActualAsString(), \get_class($actual) . ' Object', 0, 5),
false,
'Failed asserting that two objects are equal.'
);
}
}
}

/**
* Converts an object to an array containing all of its private, protected
* and public properties.
*
* @param object $object
*
* @return array
*/
protected function toArray($object)
{
return $this->exporter->toArray($object);
}
}