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<?php
/**
* PHPUnit
*
* Copyright (c) 2002-2006, Sebastian Bergmann <sb@sebastian-bergmann.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, STRIC
* 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.
*
* @category Testing
* @package PHPUnit
* @author Jan Borsodi <jb@ez.no>
* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
* @copyright 2002-2006 Sebastian Bergmann <sb@sebastian-bergmann.de>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version SVN: $Id$
* @link http://www.phpunit.de/
* @since File available since Release 3.0.0
*/
require_once 'PHPUnit/Framework.php';
require_once 'PHPUnit/Util/Array.php';
require_once 'PHPUnit/Util/Filter.php';
require_once 'PHPUnit/Util/Type.php';
PHPUnit_Util_Filter::addFileToFilter(__FILE__, 'PHPUNIT');
/**
* Constraint which checks if one value is equal to another.
*
* Equality is checked with PHP's == operator, the operator is explained in detail
* at {@url http://www.php.net/manual/en/types.comparisons.php}.
* Two values are equal if they have the same value disregarding type.
*
* The expected value is passed in the constructor.
*
* @category Testing
* @package PHPUnit
* @author Kore Nordmann <kn@ez.no>
* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
* @copyright 2002-2006 Sebastian Bergmann <sb@sebastian-bergmann.de>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version Release: @package_version@
* @link http://www.phpunit.de/
* @since Class available since Release 3.0.0
*/
class PHPUnit_Framework_Constraint_IsEqual implements PHPUnit_Framework_Constraint
{
private $value;
private $delta = 0;
private $maxDepth = 10;
public function __construct($value, $delta = 0, $maxDepth = 10)
{
$this->value = $value;
$this->delta = $delta;
$this->maxDepth = $maxDepth;
}
/**
* Evaluates the constraint for parameter $other. Returns TRUE if the
* constraint is met, FALSE otherwise.
*
* @parameter mixed $other Value or object to evaluate.
* @return bool
*/
public function evaluate($other)
{
return $this->recursiveComparison($this->value, $other);
}
/**
* @param mixed $other The value passed to evaluate() which failed the
* constraint check.
* @param string $description A string with extra description of what was
* going on while the evaluation failed.
* @param boolean $not Flag to indicate negation.
* @throws PHPUnit_Framework_ExpectationFailedException
*/
public function fail($other, $description, $not = FALSE)
{
if (!$not) {
throw new PHPUnit_Framework_ExpectationFailedException(
$description,
PHPUnit_Framework_ComparisonFailure::diffIdentical($this->value, $other)
);
} else {
throw new PHPUnit_Framework_ExpectationFailedException(
$description
);
}
}
/**
* Returns a string representation of the constraint.
*
* @return string
* @access public
*/
public function toString()
{
$delta = '';
if (is_string($this->value)) {
if (strpos($this->value, "\n") !== FALSE) {
return 'is equal to <text>';
} else {
return sprintf(
'is equal to <string:%s>',
$this->value
);
}
} else {
if ($this->delta != 0) {
$delta = sprintf(
' with delta <%d>',
$this->delta
);
}
return sprintf(
'is equal to %s%s',
PHPUnit_Util_Type::toString($this->value),
$delta
);
}
}
/**
* Perform the actual recursive comparision of two values
*
* @param mixed $a First value
* @param mixed $b Second value
* @param int $depth Depth
* @return bool
*/
protected function recursiveComparison($a, $b, $depth = 0)
{
if ($depth >= $this->maxDepth) {
return TRUE;
}
// Normal comparision for scalar values.
if ((!is_array($a) && !is_object($a)) ||
(!is_array($b) && !is_object($b))) {
if (is_numeric($a) && is_numeric($b)) {
// Optionally apply delta on numeric values.
return $this->numericComparison($a, $b);
} else {
return ($a == $b);
}
}
if (is_object($a) XOR is_object($b)) {
return FALSE;
}
if (is_object($a) && is_object($b) &&
(get_class($a) !== get_class($b))) {
return FALSE;
}
if (is_object($a)) {
$a = (array) $a;
$b = (array) $b;
}
foreach ($a as $key => $v) {
if (!array_key_exists($key, $b)) {
// Abort on missing key in $b.
return FALSE;
}
if (!$this->recursiveComparison($a[$key], $b[$key], $depth + 1)) {
// FALSE, if child comparision fails.
return FALSE;
}
// Unset key to check whether all keys of b are compared.
unset($b[$key]);
}
if (count($b)) {
// There is something in $b, that is missing in $a.
return FALSE;
}
return TRUE;
}
/**
* Compares two numeric values - use delta if applieable
*
* @param mixed $a First value
* @param mixed $b Second value
* @return bool
*/
protected function numericComparison($a, $b)
{
if ($this->delta === FALSE) {
return ($a == $b);
} else {
return (abs($a - $b) <= $this->delta);
}
}
}
?>
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