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<?php
/**
* PHPUnit
*
* Copyright (c) 2001-2013, Sebastian Bergmann <sebastian@phpunit.de>.
* 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 Sebastian Bergmann nor the names of his
* 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 OWNER 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.
*
* @package PHPUnit
* @subpackage Framework_Constraint
* @author Sebastian Bergmann <sebastian@phpunit.de>
* @author Bernhard Schussek <bschussek@2bepublished.at>
* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
* @link http://www.phpunit.de/
* @since File available since Release 3.0.0
*/
/**
* Constraint that asserts that one value is identical to another.
*
* Identical check is performed with PHP's === operator, the operator is
* explained in detail at
* {@url http://www.php.net/manual/en/types.comparisons.php}.
* Two values are identical if they have the same value and are of the same
* type.
*
* The expected value is passed in the constructor.
*
* @package PHPUnit
* @subpackage Framework_Constraint
* @author Sebastian Bergmann <sebastian@phpunit.de>
* @author Bernhard Schussek <bschussek@2bepublished.at>
* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
* @link http://www.phpunit.de/
* @since Class available since Release 3.0.0
*/
class PHPUnit_Framework_Constraint_IsIdentical extends PHPUnit_Framework_Constraint
{
/**
* @var double
*/
const EPSILON = 0.0000000001;
/**
* @var mixed
*/
protected $value;
/**
* @param mixed $value
*/
public function __construct($value)
{
$this->value = $value;
}
/**
* Evaluates the constraint for parameter $other
*
* If $returnResult is set to FALSE (the default), an exception is thrown
* in case of a failure. NULL is returned otherwise.
*
* If $returnResult is TRUE, the result of the evaluation is returned as
* a boolean value instead: TRUE in case of success, FALSE in case of a
* failure.
*
* @param mixed $other Value or object to evaluate.
* @param string $description Additional information about the test
* @param bool $returnResult Whether to return a result or throw an exception
* @return mixed
* @throws PHPUnit_Framework_ExpectationFailedException
*/
public function evaluate($other, $description = '', $returnResult = FALSE)
{
if (is_double($this->value) && is_double($other) &&
!is_infinite($this->value) && !is_infinite($other) &&
!is_nan($this->value) && !is_nan($other)) {
$success = abs($this->value - $other) < self::EPSILON;
}
else {
$success = $this->value === $other;
}
if ($returnResult) {
return $success;
}
if (!$success) {
$f = NULL;
// if both values are strings, make sure a diff is generated
if (is_string($this->value) && is_string($other)) {
$f = new PHPUnit_Framework_ComparisonFailure(
$this->value,
$other,
$this->value,
$other
);
}
$this->fail($other, $description, $f);
}
}
/**
* Returns the description of the failure
*
* The beginning of failure messages is "Failed asserting that" in most
* cases. This method should return the second part of that sentence.
*
* @param mixed $other Evaluated value or object.
* @return string
*/
protected function failureDescription($other)
{
if (is_object($this->value) && is_object($other)) {
return 'two variables reference the same object';
}
if (is_string($this->value) && is_string($other)) {
return 'two strings are identical';
}
return parent::failureDescription($other);
}
/**
* Returns a string representation of the constraint.
*
* @return string
*/
public function toString()
{
if (is_object($this->value)) {
return 'is identical to an object of class "' .
get_class($this->value) . '"';
} else {
return 'is identical to ' .
PHPUnit_Util_Type::export($this->value);
}
}
}
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