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<?php
// $Id$
/**
* Assertion that can display failure information.
* Also includes various helper methods.
* @package SimpleTest
* @subpackage UnitTester
* @abstract
*/
class SimpleExpectation {
var $_dumper = false;
var $_message;
/**
* Creates a dumper for displaying values and sets
* the test message.
* @param string $message Customised message on failure.
*/
function SimpleExpectation($message = '%s') {
$this->_message = $message;
}
/**
* Tests the expectation. True if correct.
* @param mixed $compare Comparison value.
* @return boolean True if correct.
* @access public
* @abstract
*/
function test($compare) {}
/**
* Returns a human readable test message.
* @param mixed $compare Comparison value.
* @return string Description of success
* or failure.
* @access public
* @abstract
*/
function testMessage($compare) {}
/**
* Overlays the generated message onto the stored user
* message. An additional message can be interjected.
* @param mixed $compare Comparison value.
* @param SimpleDumper $dumper For formatting the results.
* @return string Description of success
* or failure.
* @access public
*/
function overlayMessage($compare, $dumper) {
$this->_dumper = $dumper;
return sprintf($this->_message, $this->testMessage($compare));
}
/**
* Accessor for the dumper.
* @return SimpleDumper Current value dumper.
* @access protected
*/
function &_getDumper() {
if (!$this->_dumper) {
$dumper = &new SimpleDumper();
return $dumper;
}
return $this->_dumper;
}
/**
* Test to see if a value is an expectation object.
* A useful utility method.
* @param mixed $expectation Hopefully an Epectation
* class.
* @return boolean True if descended from
* this class.
* @access public
* @static
*/
function isExpectation($expectation) {
return is_object($expectation) && is_a($expectation, 'SimpleExpectation');
}
}
/**
* A wildcard expectation always matches.
* @package SimpleTest
* @subpackage MockObjects
*/
class AnythingExpectation extends SimpleExpectation {
/**
* Tests the expectation. Always true.
* @param mixed $compare Ignored.
* @return boolean True.
* @access public
*/
function test($compare) {
return true;
}
/**
* Returns a human readable test message.
* @param mixed $compare Comparison value.
* @return string Description of success
* or failure.
* @access public
*/
function testMessage($compare) {
$dumper = &$this->_getDumper();
return 'Anything always matches [' . $dumper->describeValue($compare) . ']';
}
}
/**
* An expectation that passes on boolean true.
* @package SimpleTest
* @subpackage MockObjects
*/
class TrueExpectation extends SimpleExpectation {
/**
* Tests the expectation.
* @param mixed $compare Should be true.
* @return boolean True on match.
* @access public
*/
function test($compare) {
return (boolean)$compare;
}
/**
* Returns a human readable test message.
* @param mixed $compare Comparison value.
* @return string Description of success
* or failure.
* @access public
*/
function testMessage($compare) {
$dumper = &$this->_getDumper();
return 'Expected true, got [' . $dumper->describeValue($compare) . ']';
}
}
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