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<?php
/**
* base include file for SimpleTest
* @package SimpleTest
* @subpackage UnitTester
* @version $Id: dumper.php,v 1.29 2006/05/13 14:37:16 lastcraft Exp $
*/
/**
* does type matter
*/
if (! defined('TYPE_MATTERS')) {
define('TYPE_MATTERS', true);
}
/**
* Displays variables as text and does diffs.
* @package SimpleTest
* @subpackage UnitTester
*/
class SimpleDumper {
/**
* Renders a variable in a shorter form than print_r().
* @param mixed $value Variable to render as a string.
* @return string Human readable string form.
* @access public
*/
function describeValue($value) {
$type = $this->getType($value);
switch($type) {
case "Null":
return "NULL";
case "Boolean":
return "Boolean: " . ($value ? "true" : "false");
case "Array":
return "Array: " . count($value) . " items";
case "Object":
return "Object: of " . get_class($value);
case "String":
return "String: " . $this->clipString($value, 200);
default:
return "$type: $value";
}
return "Unknown";
}
/**
* Gets the string representation of a type.
* @param mixed $value Variable to check against.
* @return string Type.
* @access public
*/
function getType($value) {
if (! isset($value)) {
return "Null";
} elseif (is_bool($value)) {
return "Boolean";
} elseif (is_string($value)) {
return "String";
} elseif (is_integer($value)) {
return "Integer";
} elseif (is_float($value)) {
return "Float";
} elseif (is_array($value)) {
return "Array";
} elseif (is_resource($value)) {
return "Resource";
} elseif (is_object($value)) {
return "Object";
}
return "Unknown";
}
/**
* Creates a human readable description of the
* difference between two variables. Uses a
* dynamic call.
* @param mixed $first First variable.
* @param mixed $second Value to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Description of difference.
* @access public
*/
function describeDifference($first, $second, $identical = false) {
if ($identical) {
if (! $this->_isTypeMatch($first, $second)) {
return "with type mismatch as [" . $this->describeValue($first) .
"] does not match [" . $this->describeValue($second) . "]";
}
}
$type = $this->getType($first);
if ($type == "Unknown") {
return "with unknown type";
}
$method = '_describe' . $type . 'Difference';
return $this->$method($first, $second, $identical);
}
/**
* Tests to see if types match.
* @param mixed $first First variable.
* @param mixed $second Value to compare with.
* @return boolean True if matches.
* @access private
*/
function _isTypeMatch($first, $second) {
return ($this->getType($first) == $this->getType($second));
}
/**
* Clips a string to a maximum length.
* @param string $value String to truncate.
* @param integer $size Minimum string size to show.
* @param integer $position Centre of string section.
* @return string Shortened version.
* @access public
*/
function clipString($value, $size, $position = 0) {
$length = strlen($value);
if ($length <= $size) {
return $value;
}
$position = min($position, $length);
$start = ($size/2 > $position ? 0 : $position - $size/2);
if ($start + $size > $length) {
$start = $length - $size;
}
$value = substr($value, $start, $size);
return ($start > 0 ? "..." : "") . $value . ($start + $size < $length ? "..." : "");
}
/**
* Creates a human readable description of the
* difference between two variables. The minimal
* version.
* @param null $first First value.
* @param mixed $second Value to compare with.
* @return string Human readable description.
* @access private
*/
function _describeGenericDifference($first, $second) {
return "as [" . $this->describeValue($first) .
"] does not match [" .
$this->describeValue($second) . "]";
}
/**
* Creates a human readable description of the
* difference between a null and another variable.
* @param null $first First null.
* @param mixed $second Null to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeNullDifference($first, $second, $identical) {
return $this->_describeGenericDifference($first, $second);
}
/**
* Creates a human readable description of the
* difference between a boolean and another variable.
* @param boolean $first First boolean.
* @param mixed $second Boolean to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeBooleanDifference($first, $second, $identical) {
return $this->_describeGenericDifference($first, $second);
}
/**
* Creates a human readable description of the
* difference between a string and another variable.
* @param string $first First string.
* @param mixed $second String to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeStringDifference($first, $second, $identical) {
if (is_object($second) || is_array($second)) {
return $this->_describeGenericDifference($first, $second);
}
$position = $this->_stringDiffersAt($first, $second);
$message = "at character $position";
$message .= " with [" .
$this->clipString($first, 200, $position) . "] and [" .
$this->clipString($second, 200, $position) . "]";
return $message;
}
/**
* Creates a human readable description of the
* difference between an integer and another variable.
* @param integer $first First number.
* @param mixed $second Number to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeIntegerDifference($first, $second, $identical) {
if (is_object($second) || is_array($second)) {
return $this->_describeGenericDifference($first, $second);
}
return "because [" . $this->describeValue($first) .
"] differs from [" .
$this->describeValue($second) . "] by " .
abs($first - $second);
}
/**
* Creates a human readable description of the
* difference between two floating point numbers.
* @param float $first First float.
* @param mixed $second Float to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeFloatDifference($first, $second, $identical) {
if (is_object($second) || is_array($second)) {
return $this->_describeGenericDifference($first, $second);
}
return "because [" . $this->describeValue($first) .
"] differs from [" .
$this->describeValue($second) . "] by " .
abs($first - $second);
}
/**
* Creates a human readable description of the
* difference between two arrays.
* @param array $first First array.
* @param mixed $second Array to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeArrayDifference($first, $second, $identical) {
if (! is_array($second)) {
return $this->_describeGenericDifference($first, $second);
}
if (! $this->_isMatchingKeys($first, $second, $identical)) {
return "as key list [" .
implode(", ", array_keys($first)) . "] does not match key list [" .
implode(", ", array_keys($second)) . "]";
}
foreach (array_keys($first) as $key) {
if ($identical && ($first[$key] === $second[$key])) {
continue;
}
if (! $identical && ($first[$key] == $second[$key])) {
continue;
}
return "with member [$key] " . $this->describeDifference(
$first[$key],
$second[$key],
$identical);
}
return "";
}
/**
* Compares two arrays to see if their key lists match.
* For an identical match, the ordering and types of the keys
* is significant.
* @param array $first First array.
* @param array $second Array to compare with.
* @param boolean $identical If true then type anomolies count.
* @return boolean True if matching.
* @access private
*/
function _isMatchingKeys($first, $second, $identical) {
$first_keys = array_keys($first);
$second_keys = array_keys($second);
if ($identical) {
return ($first_keys === $second_keys);
}
sort($first_keys);
sort($second_keys);
return ($first_keys == $second_keys);
}
/**
* Creates a human readable description of the
* difference between a resource and another variable.
* @param resource $first First resource.
* @param mixed $second Resource to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeResourceDifference($first, $second, $identical) {
return $this->_describeGenericDifference($first, $second);
}
/**
* Creates a human readable description of the
* difference between two objects.
* @param object $first First object.
* @param mixed $second Object to compare with.
* @param boolean $identical If true then type anomolies count.
* @return string Human readable description.
* @access private
*/
function _describeObjectDifference($first, $second, $identical) {
if (! is_object($second)) {
return $this->_describeGenericDifference($first, $second);
}
return $this->_describeArrayDifference(
get_object_vars($first),
get_object_vars($second),
$identical);
}
/**
* Find the first character position that differs
* in two strings by binary chop.
* @param string $first First string.
* @param string $second String to compare with.
* @return integer Position of first differing
* character.
* @access private
*/
function _stringDiffersAt($first, $second) {
if (! $first || ! $second) {
return 0;
}
if (strlen($first) < strlen($second)) {
list($first, $second) = array($second, $first);
}
$position = 0;
$step = strlen($first);
while ($step > 1) {
$step = (integer)(($step + 1) / 2);
if (strncmp($first, $second, $position + $step) == 0) {
$position += $step;
}
}
return $position;
}
/**
* Sends a formatted dump of a variable to a string.
* @param mixed $variable Variable to display.
* @return string Output from print_r().
* @access public
* @static
*/
function dump($variable) {
ob_start();
print_r($variable);
$formatted = ob_get_contents();
ob_end_clean();
return $formatted;
}
}
?>
|
