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<?php
/**
* A class to manage all aspects for Code Coverage Analysis
*
* This class
*
* PHP versions 4 and 5
*
* CakePHP(tm) Tests <http://book.cakephp.org/view/1196/Testing>
* Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The Open Group Test Suite License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://book.cakephp.org/view/1196/Testing CakePHP(tm) Tests
* @package cake
* @subpackage cake.cake.tests.lib
* @since CakePHP(tm) v 1.2.0.4433
* @license http://www.opensource.org/licenses/opengroup.php The Open Group Test Suite License
*/
App::import('Core', 'Folder');

/**
* Short description for class.
*
* @package cake
* @subpackage cake.cake.tests.lib
*/
class CodeCoverageManager {

/**
* Is this an app test case?
*
* @var string
*/
var $appTest = false;

/**
* Is this an app test case?
*
* @var string
*/
var $pluginTest = false;

/**
* Is this a grouptest?
*
* @var string
* @access public
*/
var $groupTest = false;

/**
* The test case file to analyze
*
* @var string
*/
var $testCaseFile = '';

/**
* The currently used CakeTestReporter
*
* @var string
*/
var $reporter = '';

/**
* undocumented variable
*
* @var string
*/
var $numDiffContextLines = 7;

/**
* Returns a singleton instance
*
* @return object
* @access public
*/
function &getInstance() {
static $instance = array();
if (!$instance) {
$instance[0] =& new CodeCoverageManager();
}
return $instance[0];
}

/**
* Initializes a new Coverage Analyzation for a given test case file
*
* @param string $testCaseFile The test case file being covered.
* @param object $reporter Instance of the reporter running.
* @return void
* @static
*/
function init($testCaseFile, &$reporter) {
$manager =& CodeCoverageManager::getInstance();
$manager->reporter =& $reporter;
$testCaseFile = str_replace(DS . DS, DS, $testCaseFile);
$thisFile = str_replace('.php', '.test.php', basename(__FILE__));

if (strpos($testCaseFile, $thisFile) !== false) {
trigger_error(__('Xdebug supports no parallel coverage analysis - so this is not possible.', true), E_USER_ERROR);
}
$manager->setParams($reporter);
$manager->testCaseFile = $testCaseFile;
}

/**
* Start/resume Code coverage collection.
*
* @return void
* @static
*/
function start() {
xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
}

/**
* Stops/pauses code coverage collection. Does not clean the
* code coverage memory. Use clean() to clear code coverage memory
*
* @return void
* @static
*/
function stop() {
xdebug_stop_code_coverage(false);
}

/**
* Clears the existing code coverage information. Also stops any
* running collection.
*
* @return void
* @static
*/
function clear() {
xdebug_stop_code_coverage();
}

/**
* Set the parameters from a reporter to the CodeCoverageManager
*
* @return void
*/
function setParams(&$reporter) {
if ($reporter->params['app']) {
$this->appTest = true;
}

if ($reporter->params['group']) {
$this->groupTest = true;
}

if ($reporter->params['plugin']) {
$this->pluginTest = Inflector::underscore($reporter->params['plugin']);
}
}

/**
* Stops the current code coverage analyzation and dumps a nice report
* depending on the reporter that was passed to start()
*
* @return void
* @static
*/
function report($output = true) {
$manager =& CodeCoverageManager::getInstance();

CodeCoverageManager::stop();
CodeCoverageManager::clear();

list($coverageData, $testObjectFile) = $manager->_getCoverageData();

if (empty($coverageData) && $output) {
echo "The test object file is never loaded.\n";
}

if (!$manager->groupTest) {
$execCodeLines = $manager->__getExecutableLines(file_get_contents($testObjectFile));
$result = '';

switch (get_class($manager->reporter)) {
case 'CakeHtmlReporter':
$result = $manager->reportCaseHtmlDiff(@file($testObjectFile), $coverageData, $execCodeLines, $manager->numDiffContextLines);
break;
case 'CakeCliReporter':
default:
$result = $manager->reportCaseCli(@file($testObjectFile), $coverageData, $execCodeLines, $manager->numDiffContextLines);
break;
}
} else {
$execCodeLines = $manager->__getExecutableLines($testObjectFile);
$result = '';

switch (get_class($manager->reporter)) {
case 'CakeHtmlReporter':
$result = $manager->reportGroupHtml($testObjectFile, $coverageData, $execCodeLines, $manager->numDiffContextLines);
break;
case 'CakeCliReporter':
default:
$result = $manager->reportGroupCli($testObjectFile, $coverageData, $execCodeLines, $manager->numDiffContextLines);
break;
}
}

if ($output) {
echo $result;
}
}

/**
* Gets the coverage data for the test case or group test that is being run.
*
* @return void
*/
function _getCoverageData() {
$coverageData = array();
$dump = xdebug_get_code_coverage();

if ($this->groupTest) {
$testObjectFile = $this->__testObjectFilesFromGroupFile($this->testCaseFile, $this->appTest);
foreach ($testObjectFile as $file) {
if (!file_exists($file)) {
trigger_error(sprintf(__('This test object file is invalid: %s', true), $file));
return ;
}
}
foreach ($testObjectFile as $file) {
if (isset($dump[$file])) {
$coverageData[$file] = $dump[$file];
}
}
} else {
$testObjectFile = $this->__testObjectFileFromCaseFile($this->testCaseFile, $this->appTest);

if (!file_exists($testObjectFile)) {
trigger_error(sprintf(__('This test object file is invalid: %s', true), $testObjectFile));
return ;
}

if (isset($dump[$testObjectFile])) {
$coverageData = $dump[$testObjectFile];
}
}
return array($coverageData, $testObjectFile);
}

/**
* Diff reporting
*
* @param string $testObjectFile
* @param string $coverageData
* @param string $execCodeLines
* @param string $output
* @return void
* @static
*/
function reportCaseHtmlDiff($testObjectFile, $coverageData, $execCodeLines, $numContextLines) {
$manager = CodeCoverageManager::getInstance();
$total = count($testObjectFile);
$lines = array();

for ($i = 1; $i < $total + 1; $i++) {
$foundByManualFinder = isset($execCodeLines[$i]) && trim($execCodeLines[$i]) != '';
$foundByXdebug = isset($coverageData[$i]);

if (!$foundByManualFinder || !$foundByXdebug || $coverageData[$i] === -2) {
if (isset($lines[$i])) {
$lines[$i] = 'ignored ' . $lines[$i];
} else {
$lines[$i] = 'ignored';
}
continue;
}

if ($coverageData[$i] !== -1) {
if (isset($lines[$i])) {
$lines[$i] = 'covered ' . $lines[$i];
} else {
$lines[$i] = 'covered';
}
continue;
}
$lines[$i] = 'uncovered show';
$foundEndBlockInContextSearch = false;

for ($j = 1; $j <= $numContextLines; $j++) {
$key = $i - $j;

if ($key > 0 && isset($lines[$key])) {
if (strpos($lines[$key], 'end') !== false) {
$foundEndBlockInContextSearch = true;
if ($j < $numContextLines) {
$lines[$key] = str_replace('end', '', $lines[$key-1]);
}
}

if (strpos($lines[$key], 'uncovered') === false) {
if (strpos($lines[$key], 'covered') !== false) {
$lines[$key] .= ' show';
} else {
$lines[$key] = 'ignored show';
}
}

if ($j == $numContextLines) {
$lineBeforeIsEndBlock = strpos($lines[$key-1], 'end') !== false;
$lineBeforeIsShown = strpos($lines[$key-1], 'show') !== false;
$lineBeforeIsUncovered = strpos($lines[$key-1], 'uncovered') !== false;

if (!$foundEndBlockInContextSearch && !$lineBeforeIsUncovered && ($lineBeforeIsEndBlock)) {
$lines[$key-1] = str_replace('end', '', $lines[$key-1]);
}

if (!$lineBeforeIsShown && !$lineBeforeIsUncovered) {
$lines[$key] .= ' start';
}
}
}
$key = $i + $j;

if ($key < $total) {
$lines[$key] = 'show';

if ($j == $numContextLines) {
$lines[$key] .= ' end';
}
}
}
}

// find the last "uncovered" or "show"n line and "end" its block
$lastShownLine = $manager->__array_strpos($lines, 'show', true);
if (isset($lines[$lastShownLine])) {
$lines[$lastShownLine] .= ' end';
}

// give the first start line another class so we can control the top padding of the entire results
$firstShownLine = $manager->__array_strpos($lines, 'show');
if (isset($lines[$firstShownLine])) {
$lines[$firstShownLine] .= ' realstart';
}

// get the output
$lineCount = $coveredCount = 0;
$report = '';
foreach ($testObjectFile as $num => $line) {
// start line count at 1
$num++;
$class = $lines[$num];

if (strpos($class, 'ignored') === false) {
$lineCount++;

if (strpos($class, 'covered') !== false && strpos($class, 'uncovered') === false) {
$coveredCount++;
}
}

if (strpos($class, 'show') !== false) {
$report .= $manager->__paintCodeline($class, $num, $line);
}
}
return $manager->__paintHeader($lineCount, $coveredCount, $report);
}

/**
* CLI reporting
*
* @param string $testObjectFile
* @param string $coverageData
* @param string $execCodeLines
* @param string $output
* @return void
* @static
*/
function reportCaseCli($testObjectFile, $coverageData, $execCodeLines) {
$manager = CodeCoverageManager::getInstance();
$lineCount = $coveredCount = 0;
$report = '';

foreach ($testObjectFile as $num => $line) {
$num++;
$foundByManualFinder = isset($execCodeLines[$num]) && trim($execCodeLines[$num]) != '';
$foundByXdebug = isset($coverageData[$num]) && $coverageData[$num] !== -2;

if ($foundByManualFinder && $foundByXdebug) {
$lineCount++;

if ($coverageData[$num] > 0) {
$coveredCount++;
}
}
}
return $manager->__paintHeaderCli($lineCount, $coveredCount, $report);
}

/**
* Diff reporting
*
* @param string $testObjectFile
* @param string $coverageData
* @param string $execCodeLines
* @param string $output
* @return void
* @static
*/
function reportGroupHtml($testObjectFiles, $coverageData, $execCodeLines, $numContextLines) {
$manager = CodeCoverageManager::getInstance();
$report = '';

foreach ($testObjectFiles as $testObjectFile) {
$lineCount = $coveredCount = 0;
$objFilename = $testObjectFile;
$testObjectFile = file($testObjectFile);

foreach ($testObjectFile as $num => $line) {
$num++;
$foundByManualFinder = isset($execCodeLines[$objFilename][$num]) && trim($execCodeLines[$objFilename][$num]) != '';
$foundByXdebug = isset($coverageData[$objFilename][$num]) && $coverageData[$objFilename][$num] !== -2;

if ($foundByManualFinder && $foundByXdebug) {
$class = 'uncovered';
$lineCount++;

if ($coverageData[$objFilename][$num] > 0) {
$class = 'covered';
$coveredCount++;
}
} else {
$class = 'ignored';
}
}
$report .= $manager->__paintGroupResultLine($objFilename, $lineCount, $coveredCount);
}
return $manager->__paintGroupResultHeader($report);
}

/**
* CLI reporting
*
* @param string $testObjectFile
* @param string $coverageData
* @param string $execCodeLines
* @param string $output
* @return void
* @static
*/
function reportGroupCli($testObjectFiles, $coverageData, $execCodeLines) {
$manager = CodeCoverageManager::getInstance();
$report = '';

foreach ($testObjectFiles as $testObjectFile) {
$lineCount = $coveredCount = 0;
$objFilename = $testObjectFile;
$testObjectFile = file($testObjectFile);

foreach ($testObjectFile as $num => $line) {
$num++;
$foundByManualFinder = isset($execCodeLines[$objFilename][$num]) && trim($execCodeLines[$objFilename][$num]) != '';
$foundByXdebug = isset($coverageData[$objFilename][$num]) && $coverageData[$objFilename][$num] !== -2;

if ($foundByManualFinder && $foundByXdebug) {
$lineCount++;

if ($coverageData[$objFilename][$num] > 0) {
$coveredCount++;
}
}
}
$report .= $manager->__paintGroupResultLineCli($objFilename, $lineCount, $coveredCount);
}
return $report;
}

/**
* Returns the name of the test object file based on a given test case file name
*
* @param string $file
* @param string $isApp
* @return string name of the test object file
* @access private
*/
function __testObjectFileFromCaseFile($file, $isApp = true) {
$manager = CodeCoverageManager::getInstance();
$path = $manager->__getTestFilesPath($isApp);
$folderPrefixMap = array(
'behaviors' => 'models',
'components' => 'controllers',
'helpers' => 'views'
);

foreach ($folderPrefixMap as $dir => $prefix) {
if (strpos($file, $dir) === 0) {
$path .= $prefix . DS;
break;
}
}
$testManager =& new TestManager();
$testFile = str_replace(array('/', $testManager->_testExtension), array(DS, '.php'), $file);

$folder =& new Folder();
$folder->cd(ROOT . DS . CAKE_TESTS_LIB);
$contents = $folder->read();

if (in_array(basename($testFile), $contents[1])) {
$testFile = basename($testFile);
$path = ROOT . DS . CAKE_TESTS_LIB;
}
$path .= $testFile;
$realpath = realpath($path);

if ($realpath) {
return $realpath;
}
return $path;
}

/**
* Returns an array of names of the test object files based on a given test group file name
*
* @param array $files
* @param string $isApp
* @return array names of the test object files
* @access private
*/
function __testObjectFilesFromGroupFile($groupFile, $isApp = true) {
$manager = CodeCoverageManager::getInstance();
$testManager =& new TestManager();

$path = TESTS;
if (!$isApp) {
$path = CAKE_CORE_INCLUDE_PATH . DS . 'cake' . DS . 'tests';
}
if (!!$manager->pluginTest) {
$path = App::pluginPath($manager->pluginTest) . DS . 'tests';
}

$result = array();
if ($groupFile == 'all') {
$files = array_keys($testManager->getTestCaseList());
foreach ($files as $file) {
$file = str_replace(DS . 'tests' . DS . 'cases' . DS, DS, $file);
$file = str_replace('.test.php', '.php', $file);
$file = str_replace(DS . DS, DS, $file);
$result[] = $file;
}
} else {
$path .= DS . 'groups' . DS . $groupFile . $testManager->_groupExtension;
if (!file_exists($path)) {
trigger_error(__('This group file does not exist!', true));
return array();
}

$result = array();
$groupContent = file_get_contents($path);
$ds = '\s*\.\s*DS\s*\.\s*';
$pluginTest = 'APP\.\'plugins\'' . $ds . '\'' . $manager->pluginTest . '\'' . $ds . '\'tests\'' . $ds . '\'cases\'';
$pluginTest .= '|App::pluginPath\(\'' . $manager->pluginTest . '\'\)' . $ds . '\'tests\'' . $ds . '\'cases\'';
$pattern = '/\s*TestManager::addTestFile\(\s*\$this,\s*(' . $pluginTest . '|APP_TEST_CASES|CORE_TEST_CASES)' . $ds . '(.*?)\)/i';
preg_match_all($pattern, $groupContent, $matches);

foreach ($matches[2] as $file) {
$patterns = array(
'/\s*\.\s*DS\s*\.\s*/',
'/\s*APP_TEST_CASES\s*/',
'/\s*CORE_TEST_CASES\s*/',
);

$replacements = array(DS, '', '');
$file = preg_replace($patterns, $replacements, $file);
$file = str_replace("'", '', $file);
$result[] = $manager->__testObjectFileFromCaseFile($file, $isApp) . '.php';
}
}
return $result;
}

/**
* Parses a given code string into an array of lines and replaces some non-executable code lines with the needed
* amount of new lines in order for the code line numbers to stay in sync
*
* @param string $content
* @return array array of lines
* @access private
*/
function __getExecutableLines($content) {
if (is_array($content)) {
$manager =& CodeCoverageManager::getInstance();
$result = array();
foreach ($content as $file) {
$result[$file] = $manager->__getExecutableLines(file_get_contents($file));
}
return $result;
}
$content = h($content);
// arrays are 0-indexed, but we want 1-indexed stuff now as we are talking code lines mind you (**)
$content = "\n" . $content;
// // strip unwanted lines
$content = preg_replace_callback("/(@codeCoverageIgnoreStart.*?@codeCoverageIgnoreEnd)/is", array('CodeCoverageManager', '__replaceWithNewlines'), $content);
// strip php | ?\> tag only lines
$content = preg_replace('/[ |\t]*[&lt;\?php|\?&gt;]+[ |\t]*/', '', $content);

// strip lines that contain only braces and parenthesis
$content = preg_replace('/[ |\t]*[{|}|\(|\)]+[ |\t]*/', '', $content);
$result = explode("\n", $content);
// unset the zero line again to get the original line numbers, but starting at 1, see (**)
unset($result[0]);
return $result;
}

/**
* Replaces a given arg with the number of newlines in it
*
* @return string the number of newlines in a given arg
* @access private
*/
function __replaceWithNewlines() {
$args = func_get_args();
$numLineBreaks = count(explode("\n", $args[0][0]));
return str_pad('', $numLineBreaks - 1, "\n");
}

/**
* Paints the headline for code coverage analysis
*
* @param string $codeCoverage
* @param string $report
* @return void
* @access private
*/
function __paintHeader($lineCount, $coveredCount, $report) {
$manager =& CodeCoverageManager::getInstance();
$codeCoverage = $manager->__calcCoverage($lineCount, $coveredCount);
return $report = '<h2>Code Coverage: ' . $codeCoverage . '%</h2>
<div class="code-coverage-results"><pre>' . $report . '</pre></div>';
}

/**
* Displays a notification concerning group test results
*
* @return void
* @access public
*/
function __paintGroupResultHeader($report) {
return '<div class="code-coverage-results"><p class="note">Please keep in mind that the coverage can vary a little bit depending on how much the different tests in the group interfere. If for example, TEST A calls a line from TEST OBJECT B, the coverage for TEST OBJECT B will be a little greater than if you were running the corresponding test case for TEST OBJECT B alone.</p><pre>' . $report . '</pre></div>';
}

/**
* Paints the headline for code coverage analysis
*
* @param string $codeCoverage
* @param string $report
* @return void
* @access private
*/
function __paintGroupResultLine($file, $lineCount, $coveredCount) {
$manager =& CodeCoverageManager::getInstance();
$codeCoverage = $manager->__calcCoverage($lineCount, $coveredCount);
$class = 'result-bad';

if ($codeCoverage > 50) {
$class = 'result-ok';
}
if ($codeCoverage > 80) {
$class = 'result-good';
}
return '<p>Code Coverage for ' . $file . ': <span class="' . $class . '">' . $codeCoverage . '%</span></p>';
}

/**
* Paints the headline for code coverage analysis
*
* @param string $codeCoverage
* @param string $report
* @return void
* @access private
*/
function __paintGroupResultLineCli($file, $lineCount, $coveredCount) {
$manager =& CodeCoverageManager::getInstance();
$codeCoverage = $manager->__calcCoverage($lineCount, $coveredCount);
$class = 'bad';
if ($codeCoverage > 50) {
$class = 'ok';
}
if ($codeCoverage > 80) {
$class = 'good';
}
return "\n" . 'Code Coverage for ' . $file . ': ' . $codeCoverage . '% (' . $class . ')' . "\n";
}

/**
* Paints the headline for code coverage analysis in the CLI
*
* @param string $codeCoverage
* @param string $report
* @return void
* @access private
*/
function __paintHeaderCli($lineCount, $coveredCount, $report) {
$manager =& CodeCoverageManager::getInstance();
$codeCoverage = $manager->__calcCoverage($lineCount, $coveredCount);
$class = 'bad';
if ($codeCoverage > 50) {
$class = 'ok';
}
if ($codeCoverage > 80) {
$class = 'good';
}
return $report = "Code Coverage: $codeCoverage% ($class)\n";
}

/**
* Paints a code line for html output
*
* @package default
* @access private
*/
function __paintCodeline($class, $num, $line) {
$line = h($line);

if (trim($line) == '') {
$line = '&nbsp;'; // Win IE fix
}
return '<div class="code-line ' . trim($class) . '"><span class="line-num">' . $num . '</span><span class="content">' . $line . '</span></div>';
}

/**
* Calculates the coverage percentage based on a line count and a covered line count
*
* @param string $lineCount
* @param string $coveredCount
* @return void
* @access private
*/
function __calcCoverage($lineCount, $coveredCount) {
if ($coveredCount > $lineCount) {
trigger_error(__('Sorry, you cannot have more covered lines than total lines!', true));
}
return ($lineCount != 0)
? round(100 * $coveredCount / $lineCount, 2)
: '0.00';
}

/**
* Gets us the base path to look for the test files
*
* @param string $isApp
* @return void
* @access public
*/
function __getTestFilesPath($isApp = true) {
$manager = CodeCoverageManager::getInstance();
$path = ROOT . DS;

if ($isApp) {
$path .= APP_DIR . DS;
} elseif (!!$manager->pluginTest) {
$pluginPath = APP . 'plugins' . DS . $manager->pluginTest . DS;

$pluginPaths = App::path('plugins');
foreach ($pluginPaths as $tmpPath) {
$tmpPath = $tmpPath . $manager->pluginTest . DS;
if (file_exists($tmpPath)) {
$pluginPath = $tmpPath;
break;
}
}

$path = $pluginPath;
} else {
$path = TEST_CAKE_CORE_INCLUDE_PATH;
}

return $path;
}

/**
* Finds the last element of an array that contains $needle in a strpos computation
*
* @param array $arr
* @param string $needle
* @return void
* @access private
*/
function __array_strpos($arr, $needle, $reverse = false) {
if (!is_array($arr) || empty($arr)) {
return false;
}

if ($reverse) {
$arr = array_reverse($arr, true);
}

foreach ($arr as $key => $val) {
if (strpos($val, $needle) !== false) {
return $key;
}
}
return false;
}
}
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