test_case.php

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<?php
/**
 *  Base include file for SimpleTest
 *  @package    SimpleTest
 *  @subpackage UnitTester
 *  @version    $Id: test_case.php 1726 2008-04-08 01:20:10Z lastcraft $
 */

/**#@+
 * Includes SimpleTest files and defined the root constant
 * for dependent libraries.
 */
require_once(dirname(__FILE__) . '/invoker.php');
require_once(dirname(__FILE__) . '/errors.php');
require_once(dirname(__FILE__) . '/compatibility.php');
require_once(dirname(__FILE__) . '/scorer.php');
require_once(dirname(__FILE__) . '/expectation.php');
require_once(dirname(__FILE__) . '/dumper.php');
require_once(dirname(__FILE__) . '/simpletest.php');
if (version_compare(phpversion(), '5') >= 0) {
    require_once(dirname(__FILE__) . '/exceptions.php');
    require_once(dirname(__FILE__) . '/reflection_php5.php');
} else {
    require_once(dirname(__FILE__) . '/reflection_php4.php');
}
if (! defined('SIMPLE_TEST')) {
    /**
     * @ignore
     */
    define('SIMPLE_TEST', dirname(__FILE__) . DIRECTORY_SEPARATOR);
}
/**#@-*/

/**
 *    Basic test case. This is the smallest unit of a test
 *    suite. It searches for
 *    all methods that start with the the string "test" and
 *    runs them. Working test cases extend this class.
 *    @package      SimpleTest
 *    @subpackage   UnitTester
 */
class SimpleTestCase {
    var $_label = false;
    var $_reporter;
    var $_observers;
    var $_should_skip = false;

    /**
     *    Sets up the test with no display.
     *    @param string $label    If no test name is given then
     *                            the class name is used.
     *    @access public
     */
    function SimpleTestCase($label = false) {
        if ($label) {
            $this->_label = $label;
        }
    }

    /**
     *    Accessor for the test name for subclasses.
     *    @return string           Name of the test.
     *    @access public
     */
    function getLabel() {
        return $this->_label ? $this->_label : get_class($this);
    }

    /**
     *    This is a placeholder for skipping tests. In this
     *    method you place skipIf() and skipUnless() calls to
     *    set the skipping state.
     *    @access public
     */
    function skip() {
    }

    /**
     *    Will issue a message to the reporter and tell the test
     *    case to skip if the incoming flag is true.
     *    @param string $should_skip    Condition causing the tests to be skipped.
     *    @param string $message        Text of skip condition.
     *    @access public
     */
    function skipIf($should_skip, $message = '%s') {
        if ($should_skip && ! $this->_should_skip) {
            $this->_should_skip = true;
            $message = sprintf($message, 'Skipping [' . get_class($this) . ']');
            $this->_reporter->paintSkip($message . $this->getAssertionLine());
        }
    }

    /**
     *    Will issue a message to the reporter and tell the test
     *    case to skip if the incoming flag is false.
     *    @param string $shouldnt_skip  Condition causing the tests to be run.
     *    @param string $message        Text of skip condition.
     *    @access public
     */
    function skipUnless($shouldnt_skip, $message = false) {
        $this->skipIf(! $shouldnt_skip, $message);
    }

    /**
     *    Used to invoke the single tests.
     *    @return SimpleInvoker        Individual test runner.
     *    @access public
     */
    function &createInvoker() {
        $invoker = &new SimpleErrorTrappingInvoker(new SimpleInvoker($this));
        if (version_compare(phpversion(), '5') >= 0) {
            $invoker = &new SimpleExceptionTrappingInvoker($invoker);
        }
        return $invoker;
    }

    /**
     *    Uses reflection to run every method within itself
     *    starting with the string "test" unless a method
     *    is specified.
     *    @param SimpleReporter $reporter    Current test reporter.
     *    @return boolean                    True if all tests passed.
     *    @access public
     */
    function run(&$reporter) {
        $context = &SimpleTest::getContext();
        $context->setTest($this);
        $context->setReporter($reporter);
        $this->_reporter = &$reporter;
        $started = false;
        foreach ($this->getTests() as $method) {
            if ($reporter->shouldInvoke($this->getLabel(), $method)) {
                $this->skip();
                if ($this->_should_skip) {
                    break;
                }
                if (! $started) {
                    $reporter->paintCaseStart($this->getLabel());
                    $started = true;
                }
                $invoker = &$this->_reporter->createInvoker($this->createInvoker());
                $invoker->before($method);
                $invoker->invoke($method);
                $invoker->after($method);
            }
        }
        if ($started) {
            $reporter->paintCaseEnd($this->getLabel());
        }
        unset($this->_reporter);
        return $reporter->getStatus();
    }

    /**
     *    Gets a list of test names. Normally that will
     *    be all internal methods that start with the
     *    name "test". This method should be overridden
     *    if you want a different rule.
     *    @return array        List of test names.
     *    @access public
     */
    function getTests() {
        $methods = array();
        foreach (get_class_methods(get_class($this)) as $method) {
            if ($this->_isTest($method)) {
                $methods[] = $method;
            }
        }
        return $methods;
    }

    /**
     *    Tests to see if the method is a test that should
     *    be run. Currently any method that starts with 'test'
     *    is a candidate unless it is the constructor.
     *    @param string $method        Method name to try.
     *    @return boolean              True if test method.
     *    @access protected
     */
    function _isTest($method) {
        if (strtolower(substr($method, 0, 4)) == 'test') {
            return ! SimpleTestCompatibility::isA($this, strtolower($method));
        }
        return false;
    }

    /**
     *    Announces the start of the test.
     *    @param string $method    Test method just started.
     *    @access public
     */
    function before($method) {
        $this->_reporter->paintMethodStart($method);
        $this->_observers = array();
    }

    /**
     *    Sets up unit test wide variables at the start
     *    of each test method. To be overridden in
     *    actual user test cases.
     *    @access public
     */
    function setUp() {
    }

    /**
     *    Clears the data set in the setUp() method call.
     *    To be overridden by the user in actual user test cases.
     *    @access public
     */
    function tearDown() {
    }

    /**
     *    Announces the end of the test. Includes private clean up.
     *    @param string $method    Test method just finished.
     *    @access public
     */
    function after($method) {
        for ($i = 0; $i < count($this->_observers); $i++) {
            $this->_observers[$i]->atTestEnd($method, $this);
        }
        $this->_reporter->paintMethodEnd($method);
    }

    /**
     *    Sets up an observer for the test end.
     *    @param object $observer    Must have atTestEnd()
     *                               method.
     *    @access public
     */
    function tell(&$observer) {
        $this->_observers[] = &$observer;
    }

    /**
     *    @deprecated
     */
    function pass($message = "Pass") {
        if (! isset($this->_reporter)) {
            trigger_error('Can only make assertions within test methods');
        }
        $this->_reporter->paintPass(
                $message . $this->getAssertionLine());
        return true;
    }

    /**
     *    Sends a fail event with a message.
     *    @param string $message        Message to send.
     *    @access public
     */
    function fail($message = "Fail") {
        if (! isset($this->_reporter)) {
            trigger_error('Can only make assertions within test methods');
        }
        $this->_reporter->paintFail(
                $message . $this->getAssertionLine());
        return false;
    }

    /**
     *    Formats a PHP error and dispatches it to the
     *    reporter.
     *    @param integer $severity  PHP error code.
     *    @param string $message    Text of error.
     *    @param string $file       File error occoured in.
     *    @param integer $line      Line number of error.
     *    @access public
     */
    function error($severity, $message, $file, $line) {
        if (! isset($this->_reporter)) {
            trigger_error('Can only make assertions within test methods');
        }
        $this->_reporter->paintError(
                "Unexpected PHP error [$message] severity [$severity] in [$file line $line]");
    }

    /**
     *    Formats an exception and dispatches it to the
     *    reporter.
     *    @param Exception $exception    Object thrown.
     *    @access public
     */
    function exception($exception) {
        $this->_reporter->paintException($exception);
    }

    /**
     *    @deprecated
     */
    function signal($type, &$payload) {
        if (! isset($this->_reporter)) {
            trigger_error('Can only make assertions within test methods');
        }
        $this->_reporter->paintSignal($type, $payload);
    }

    /**
     *    Runs an expectation directly, for extending the
     *    tests with new expectation classes.
     *    @param SimpleExpectation $expectation  Expectation subclass.
     *    @param mixed $compare               Value to compare.
     *    @param string $message                 Message to display.
     *    @return boolean                        True on pass
     *    @access public
     */
    function assert(&$expectation, $compare, $message = '%s') {
        if ($expectation->test($compare)) {
            return $this->pass(sprintf(
                    $message,
                    $expectation->overlayMessage($compare, $this->_reporter->getDumper())));
        } else {
            return $this->fail(sprintf(
                    $message,
                    $expectation->overlayMessage($compare, $this->_reporter->getDumper())));
        }
    }

    /**
     *    @deprecated
     */
    function assertExpectation(&$expectation, $compare, $message = '%s') {
        return $this->assert($expectation, $compare, $message);
    }

    /**
     *    Uses a stack trace to find the line of an assertion.
     *    @return string           Line number of first assert*
     *                             method embedded in format string.
     *    @access public
     */
    function getAssertionLine() {
        $trace = new SimpleStackTrace(array('assert', 'expect', 'pass', 'fail', 'skip'));
        return $trace->traceMethod();
    }

    /**
     *    Sends a formatted dump of a variable to the
     *    test suite for those emergency debugging
     *    situations.
     *    @param mixed $variable    Variable to display.
     *    @param string $message    Message to display.
     *    @return mixed             The original variable.
     *    @access public
     */
    function dump($variable, $message = false) {
        $dumper = $this->_reporter->getDumper();
        $formatted = $dumper->dump($variable);
        if ($message) {
            $formatted = $message . "\n" . $formatted;
        }
        $this->_reporter->paintFormattedMessage($formatted);
        return $variable;
    }