path: root/tests/PHPUnit/Integration/ReleaseCheckListTest.php

<?php
/**
 * Piwik - free/libre analytics platform
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */

namespace Piwik\Tests\Integration;

use Exception;
use Piwik\Config;
use Piwik\Container\StaticContainer;
use Piwik\Filesystem;
use Piwik\Http;
use Piwik\Ini\IniReader;
use Piwik\Plugin\Manager;
use Piwik\Tests\Framework\TestCase\SystemTestCase;
use Piwik\Tracker;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;

/**
 * @group Core
 * @group ReleaseCheckListTest
 */
class ReleaseCheckListTest extends \PHPUnit_Framework_TestCase
{
    private $globalConfig;

    const MINIMUM_PHP_VERSION = '5.3.3';

    public function setUp()
    {
        $iniReader = new IniReader();
        $this->globalConfig = $iniReader->readFile(PIWIK_PATH_TEST_TO_ROOT . '/config/global.ini.php');

        parent::setUp();
    }

    public function test_minimumPHPVersion_isEnforced()
    {
        global $piwik_minimumPHPVersion;
        $this->assertEquals(self::MINIMUM_PHP_VERSION, $piwik_minimumPHPVersion, 'minimum PHP version global variable correctly defined');
    }

    public function test_minimumPhpVersion_isDefinedInComposerJson()
    {
        $composerJson = $this->getComposerJsonAsArray();
        $this->assertEquals(self::MINIMUM_PHP_VERSION, $composerJson['config']['platform']['php']);

        $expectedRequirePhp = '>=' . self::MINIMUM_PHP_VERSION;
        $this->assertEquals($expectedRequirePhp, $composerJson['require']['php']);
    }

    public function test_icoFilesIconsShouldBeInPngFormat()
    {
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/plugins', '*.ico');
        $this->checkFilesAreInPngFormat($files);
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/core', '*.ico');
        $this->checkFilesAreInPngFormat($files);
    }

    public function test_pngFilesIconsShouldBeInPngFormat()
    {
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/plugins', '*.png');
        // filter expected screenshots as they might not be checked out and downloaded when stored in git-lfs
        $files = array_filter($files, function($value) { return !preg_match('/expected-screenshots/', $value); });
        $this->checkFilesAreInPngFormat($files);
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/core', '*.png');
        $this->checkFilesAreInPngFormat($files);
    }

    public function test_gifFilesIconsShouldBeInGifFormat()
    {
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/plugins', '*.gif');
        $this->checkFilesAreInGifFormat($files);
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/core', '*.gif');
        $this->checkFilesAreInGifFormat($files);
    }

    public function test_jpgImagesShouldBeInJpgFormat()
    {
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/plugins', '*.jpg');
        $this->checkFilesAreInJpgFormat($files);
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/core', '*.jpg');
        $this->checkFilesAreInJpgFormat($files);
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/plugins', '*.jpeg');
        $this->checkFilesAreInJpgFormat($files);
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/core', '*.jpeg');
        $this->checkFilesAreInJpgFormat($files);
    }

    public function testCheckThatConfigurationValuesAreProductionValues()
    {
        $this->_checkEqual(array('Debug' => 'always_archive_data_day'), '0');
        $this->_checkEqual(array('Debug' => 'always_archive_data_period'), '0');
        $this->_checkEqual(array('Debug' => 'enable_sql_profiler'), '0');
        $this->_checkEqual(array('General' => 'time_before_today_archive_considered_outdated'), '150');
        $this->_checkEqual(array('General' => 'enable_browser_archiving_triggering'), '1');
        $this->_checkEqual(array('General' => 'default_language'), 'en');
        $this->_checkEqual(array('Tracker' => 'record_statistics'), '1');
        $this->_checkEqual(array('Tracker' => 'visit_standard_length'), '1800');
        $this->_checkEqual(array('Tracker' => 'trust_visitors_cookies'), '0');
        $this->_checkEqual(array('log' => 'log_level'), 'WARN');
        $this->_checkEqual(array('log' => 'log_writers'), array('screen'));
        $this->_checkEqual(array('log' => 'logger_api_call'), null);

        require_once PIWIK_INCLUDE_PATH . "/core/TaskScheduler.php";
        $this->assertFalse(defined('DEBUG_FORCE_SCHEDULED_TASKS'));

        // Check the index.php has "backtrace disabled"
        $content = file_get_contents(PIWIK_INCLUDE_PATH . "/index.php");
        $expected = "define('PIWIK_PRINT_ERROR_BACKTRACE', false);";
        $this->assertTrue( false !== strpos($content, $expected), 'index.php should contain: ' . $expected);
    }

    private function _checkEqual($key, $valueExpected)
    {
        $section = key($key);
        $optionName = current($key);
        $value = null;
        if (isset($this->globalConfig[$section][$optionName])) {
            $value = $this->globalConfig[$section][$optionName];
        }
        $this->assertEquals($valueExpected, $value, "$section -> $optionName was '" . var_export($value, true) . "', expected '" . var_export($valueExpected, true) . "'");
    }

    public function testTemplatesDontContainDebug()
    {
        $patternFailIfFound = 'dump(';
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH . '/plugins', '*.twig');
        foreach ($files as $file) {
            if ($file == PIWIK_INCLUDE_PATH . '/plugins/TestRunner/templates/travis.yml.twig') {
                continue;
            }

            $content = file_get_contents($file);
            $this->assertFalse(strpos($content, $patternFailIfFound), 'found in ' . $file);
        }
    }

    public function getTemplateFileExtensions()
    {
        $extensions = array(
            array('htm'),
            array('html'),
            array('twig'),
            array('tpl'),
        );
        return $extensions;
    }

    /**
     * @dataProvider getTemplateFileExtensions
     */
    public function testTemplatesDontContainJquery($extension)
    {
        $patternFailIfFound = 'jquery';

        // known files that will for sure not contain a "buggy" $patternFailIfFound
        $whiteListedFiles = array(
            PIWIK_INCLUDE_PATH . '/plugins/TestRunner/templates/travis.yml.twig',
            PIWIK_INCLUDE_PATH . '/plugins/CoreUpdater/templates/layout.twig',
            PIWIK_INCLUDE_PATH . '/plugins/Installation/templates/layout.twig',
            PIWIK_INCLUDE_PATH . '/plugins/Login/templates/login.twig',
            PIWIK_INCLUDE_PATH . '/tests/UI/screenshot-diffs/singlediff.html',

            // Note: entries below are paths and any file within these paths will be automatically whitelisted
            PIWIK_INCLUDE_PATH . '/tests/resources/overlay-test-site-real/',
            PIWIK_INCLUDE_PATH . '/tests/resources/overlay-test-site/',
            PIWIK_INCLUDE_PATH . '/vendor/facebook/xhprof/xhprof_html/docs/',
        );

        $files = Filesystem::globr(PIWIK_INCLUDE_PATH, '*.' . $extension);
        $this->assertFilesDoNotContain($files, $patternFailIfFound, $whiteListedFiles);
    }

    /**
     * @param $files
     * @param $patternFailIfFound
     * @param $whiteListedFiles
     */
    private function assertFilesDoNotContain($files, $patternFailIfFound, $whiteListedFiles)
    {
        $foundPatterns = array();
        foreach ($files as $file) {
            if($this->isFileOrPathWhitelisted($whiteListedFiles, $file)) {
                continue;
            }
            $content = file_get_contents($file);
            $foundPattern = strpos($content, $patternFailIfFound) !== false;

            if($foundPattern) {
                $foundPatterns[] = $file;
            }
        }

        $this->assertEmpty($foundPatterns,
                sprintf("Forbidden pattern \"%s\" was found in the following files ---> please manually delete these files from Git. \n\n\t%s",
                    $patternFailIfFound,
                    implode("\n\t", $foundPatterns)
                )
        );
    }

    /**
     * @param $whiteListedFiles
     * @param $file
     * @return bool
     */
    private function isFileOrPathWhitelisted($whiteListedFiles, $file)
    {
        foreach ($whiteListedFiles as $whitelistFile) {
            if (strpos($file, $whitelistFile) === 0) {
                return true;
            }
        }
        return false;
    }


    public function testCheckThatGivenPluginsAreDisabledByDefault()
    {
        $pluginsShouldBeDisabled = array(
            'DBStats'
        );
        foreach ($pluginsShouldBeDisabled as $pluginName) {
            if (in_array($pluginName, $this->globalConfig['Plugins']['Plugins'])) {
                throw new Exception("Plugin $pluginName is enabled by default but shouldn't.");
            }
        }

    }

    /**
     * test that the profiler is disabled (mandatory on a production server)
     */
    public function testProfilingDisabledInProduction()
    {
        require_once 'Tracker/Db.php';
        $this->assertTrue(\Piwik\Tracker\Db::isProfilingEnabled() === false, 'SQL profiler should be disabled in production! See Db::$profiling');
    }

    public function testPiwikTrackerDebugIsOff()
    {
        $this->assertTrue(!isset($GLOBALS['PIWIK_TRACKER_DEBUG']));
        $this->assertEquals(0, $this->globalConfig['Tracker']['debug']);

        $tracker = new Tracker();
        $this->assertFalse($tracker->isDebugModeEnabled());
    }

    /**
     * This tests that all PHP files start with <?php
     * This would help detect errors such as a php file starting with spaces
     */
    public function test_phpFilesStartWithRightCharacter()
    {
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH, '*.php');

        $tested = 0;
        foreach($files as $file) {
            // skip files in these folders
            if (strpos($file, '/libs/') !== false) {
                continue;
            }

            $handle = fopen($file, "r");
            $expectedStart = "<?php";

            $isIniFile = strpos($file, ".ini.php") !== false || strpos($file, ".ini.travis.php") !== false;
            if($isIniFile) {
                $expectedStart = "; <?php exit;";
            }

            $skipStartFileTest = $this->isSkipPhpFileStartWithPhpBlock($file, $isIniFile);

            if($skipStartFileTest) {
                continue;
            }

            $start = fgets($handle, strlen($expectedStart) + 1 );
            $this->assertEquals($start, $expectedStart, "File $file does not start with $expectedStart");
            $tested++;
        }

        $this->assertGreaterThan(2000, $tested, 'should have tested at least thousand of  php files');
    }

    public function test_jsfilesDoNotContainFakeSpaces()
    {
        $js = Filesystem::globr(PIWIK_INCLUDE_PATH, '*.js');
        $this->checkFilesDoNotHaveWeirdSpaces($js);
    }

    public function test_phpfilesDoNotContainFakeSpaces()
    {
        $js = Filesystem::globr(PIWIK_INCLUDE_PATH, '*.php');
        $this->checkFilesDoNotHaveWeirdSpaces($js);
    }

    public function test_twigfilesDoNotContainFakeSpaces()
    {
        $js = Filesystem::globr(PIWIK_INCLUDE_PATH, '*.twig');
        $this->checkFilesDoNotHaveWeirdSpaces($js);
    }

    public function test_htmlfilesDoNotContainFakeSpaces()
    {
        $js = Filesystem::globr(PIWIK_INCLUDE_PATH, '*.html');
        $this->checkFilesDoNotHaveWeirdSpaces($js);
    }

    public function test_directoriesShouldBeChmod755()
    {
        $pluginsPath = realpath(PIWIK_INCLUDE_PATH . '/plugins/');

        $objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($pluginsPath), RecursiveIteratorIterator::SELF_FIRST);
        $paths = array();
        foreach($objects as $name => $object){
            if (is_dir($name)
                && strpos($name, "/.") === false) {
                $paths[] = $name;
            }
        }

        $this->assertGreaterThan(50, count($paths), 'test at latest 50 directories, got ' . count($paths));

        // to prevent errors with un-readable assets,
        // we ensure all directories in plugins/* are added to git with CHMOD 755
        foreach($paths as $pathToTest) {

            $chmod = substr(decoct(fileperms($pathToTest)), -3);
            $valid = array('777', '775', '755');
            $command = "find $pluginsPath -type d -exec chmod 755 {} +";
            $this->assertTrue(in_array($chmod, $valid),
                    "Some directories within plugins/ are not chmod 755 \n\nGot: $chmod for : $pathToTest \n\n".
                    "Run this command to set all directories to 755: \n$command\n");;
        }
    }

    /**
     * Check that directories in plugins/ folder are specifically either enabled or disabled.
     *
     * This fails when a new folder is added to plugins/* and forgot to enable or mark as disabled in Manager.php.
     */
    public function test_DirectoriesInPluginsFolder_areKnown()
    {
        $pluginsBundledWithPiwik = Config::getInstance()->getFromGlobalConfig('Plugins');
        $pluginsBundledWithPiwik = $pluginsBundledWithPiwik['Plugins'];
        $magicPlugins = 42;
        $this->assertTrue(count($pluginsBundledWithPiwik) > $magicPlugins);

        $plugins = _glob(Manager::getPluginsDirectory() . '*', GLOB_ONLYDIR);
        $count = 1;
        foreach($plugins as $pluginPath) {
            $pluginName = basename($pluginPath);

            $addedToGit = $this->isPathAddedToGit($pluginPath);

            if(!$addedToGit) {
                // if not added to git, then it is not part of the release checklist.
                continue;
            }
            $manager = Manager::getInstance();
            $isGitSubmodule = $manager->isPluginOfficialAndNotBundledWithCore($pluginName);

            $pluginList = StaticContainer::get('Piwik\Application\Kernel\PluginList');

            $disabled = in_array($pluginName, $pluginList->getCorePluginsDisabledByDefault())  || $isGitSubmodule;

            $enabled = in_array($pluginName, $pluginsBundledWithPiwik);

            $this->assertTrue( $enabled + $disabled === 1,
                "Plugin $pluginName should be either enabled (in global.ini.php) or disabled (in Piwik\\Plugin\\Manager).
                It is currently (enabled=".(int)$enabled. ", disabled=" . (int)$disabled . ")"
            );
            $count++;
        }
        $this->assertTrue($count > $magicPlugins);
    }

    public function testEndOfLines()
    {
        foreach (Filesystem::globr(PIWIK_DOCUMENT_ROOT, '*') as $file) {
            // skip files in these folders
            if (strpos($file, '/.git/') !== false ||
                strpos($file, '/documentation/') !== false ||
                strpos($file, '/tests/') !== false ||
                strpos($file, '/lang/') !== false ||
                strpos($file, 'yuicompressor') !== false ||
                strpos($file, '/libs/') !== false ||
                (strpos($file, '/vendor') !== false && strpos($file, '/vendor/piwik') === false) ||
                strpos($file, '/tmp/') !== false
            ) {
                continue;
            }

            // skip files with these file extensions
            if (preg_match('/\.(bmp|fdf|gif|deb|deflate|exe|gz|ico|jar|jpg|p12|pdf|png|rar|swf|vsd|z|zip|ttf|so|dat|eps|phar|pyc|gzip|eot|woff|svg)$/', $file)) {
                continue;
            }

            if (!is_dir($file)) {
                $contents = file_get_contents($file);

                // expect CRLF
                if (preg_match('/\.(bat|ps1)$/', $file)) {
                    $contents = str_replace("\r\n", '', $contents);
                    $this->assertTrue(strpos($contents, "\n") === false, 'Incorrect line endings in ' . $file);
                } else {
                    // expect native
                    $hasWindowsEOL = strpos($contents, "\r\n");

                    // overwrite translations files with incorrect line endings
                    $this->assertTrue($hasWindowsEOL === false, 'Incorrect line endings \r\n found in ' . $file);
                }
            }
        }
    }

    public function testPiwikJavaScript()
    {
        // check source against Snort rule 8443
        // @see https://github.com/piwik/piwik/issues/2203
        $pattern = '/\x5b\x5c{2}.*\x5c{2}[\x22\x27]/';
        $contents = file_get_contents(PIWIK_DOCUMENT_ROOT . '/js/piwik.js');

        $this->assertTrue(preg_match($pattern, $contents) == 0);

        $contents = file_get_contents(PIWIK_DOCUMENT_ROOT . '/piwik.js');
        $this->assertTrue(preg_match($pattern, $contents) == 0);
    }

    public function test_piwikJs_minified_isUpToDate()
    {
        Http::fetchRemoteFile('https://github.com/downloads/yui/yuicompressor/yuicompressor-2.4.7.zip', PIWIK_DOCUMENT_ROOT .'/tmp/yuicompressor.zip');
        shell_exec('unzip -n '. PIWIK_DOCUMENT_ROOT .'/tmp/yuicompressor.zip');
        shell_exec("sed '/<DEBUG>/,/<\/DEBUG>/d' < ". PIWIK_DOCUMENT_ROOT ."/js/piwik.js | sed 's/eval/replacedEvilString/' | java -jar yuicompressor-2.4.7/build/yuicompressor-2.4.7.jar --type js --line-break 1000 | sed 's/replacedEvilString/eval/' | sed 's/^[/][*]/\/*!/' > " . PIWIK_DOCUMENT_ROOT ."/piwik-minified.js");

        $this->assertFileEquals(PIWIK_DOCUMENT_ROOT . '/piwik-minified.js',
            PIWIK_DOCUMENT_ROOT . '/piwik.js',
            'minified /piwik.js is out of date, please re-generate the minified files using instructions in /js/README'
        );
        $this->assertFileEquals(PIWIK_DOCUMENT_ROOT . '/piwik-minified.js',
            PIWIK_DOCUMENT_ROOT . '/js/piwik.min.js',
            'minified /js/piwik.min.js is out of date, please re-generate the minified files using instructions in /js/README'
        );
    }

    public function testTmpDirectoryContainsGitKeep()
    {
        $this->assertFileExists(PIWIK_DOCUMENT_ROOT . '/tmp/.gitkeep');
    }

    private function checkFilesAreInPngFormat($files)
    {
        $this->checkFilesAreInFormat($files, "png");
    }
    private function checkFilesAreInJpgFormat($files)
    {
        $this->checkFilesAreInFormat($files, "jpeg");
    }

    private function checkFilesAreInGifFormat($files)
    {
        $this->checkFilesAreInFormat($files, "gif");
    }

    private function checkFilesAreInFormat($files, $format)
    {
        $errors = array();
        foreach ($files as $file) {
            // skip files in these folders
            if (strpos($file, '/libs/') !== false) {
                continue;
            }

            $function = "imagecreatefrom" . $format;
            if (!function_exists($function)) {
                throw new \Exception("Unexpected error: $function function does not exist!");
            }

            $handle = @$function($file);
            if (empty($handle)) {
                $errors[] = $file;
            }
        }

        if (!empty($errors)) {
            $icons = implode(" ", $errors);
            $this->fail("$format format failed for following icons $icons \n");
        }
    }

    /**
     * @return bool
     */
    protected function isSkipPhpFileStartWithPhpBlock($file, $isIniFile)
    {
        $isIniFileInTests = strpos($file, "/tests/") !== false;
        $isTestResultFile = strpos($file, "/System/expected") !== false
            || strpos($file, "tests/resources/Updater/") !== false
            || strpos($file, "Twig/Tests/") !== false
            || strpos($file, "processed/") !== false
            || strpos($file, "/vendor/") !== false
            || (strpos($file, "tmp/") !== false && strpos($file, 'index.php') !== false);
        $isLib = strpos($file, "lib/xhprof") !== false || strpos($file, "phpunit/phpunit") !== false;

        return ($isIniFile && $isIniFileInTests) || $isTestResultFile || $isLib;
    }

    /**
     * @return bool
     */
    protected function isPathAddedToGit($pluginPath)
    {
        $gitOutput = shell_exec('git ls-files ' . $pluginPath . ' --error-unmatch 2>&1');
        $addedToGit = (strlen($gitOutput) > 0) && strpos($gitOutput, 'error: pathspec') === false;
        return $addedToGit;
    }


    /**
     * Tests that the Piwik files are not too big, to ensure the downloadable ZIP package is not too large
     */
    public function test_TotalPiwikFilesSize_isWithinReasonnableSize()
    {
        if(!SystemTestCase::isTravisCI()) {
            // Don't run the test on local dev machine, as we may have other files (not in GIT) that would fail this test
            $this->markTestSkipped("Skipped this test on local dev environment.");
        }
        $maximumTotalFilesizesExpectedInMb = 50;
        $minimumTotalFilesizesExpectedInMb = 38;
        $minimumExpectedFilesCount = 7000;

        $filesizes = $this->getAllFilesizes();
        $sumFilesizes = array_sum($filesizes);

        $filesOrderedBySize = $filesizes;
        arsort($filesOrderedBySize);

        $this->assertLessThan(
            $maximumTotalFilesizesExpectedInMb * 1024 * 1024,
            $sumFilesizes,
            sprintf("Sum of all files should be less than $maximumTotalFilesizesExpectedInMb Mb.
                    \nGot total file sizes of: %d Mb.
                    \nBiggest files: %s",
                $sumFilesizes / 1024 / 1024,
                var_export(array_slice($filesOrderedBySize, 0, 100, $preserveKeys = true), true)
            )
        );

        $this->assertGreaterThan($minimumExpectedFilesCount, count($filesizes), "Expected at least $minimumExpectedFilesCount files should be included in Piwik.");
        $this->assertGreaterThan($minimumTotalFilesizesExpectedInMb * 1024 * 1024, $sumFilesizes, "expected to have at least $minimumTotalFilesizesExpectedInMb Mb of files in Piwik codebase.");
    }

    /**
     * @param $file
     * @return bool
     */
    private function isFileIncludedInFinalRelease($file)
    {
        if(is_dir($file)) {
            return false;
        }

        // in build-package.sh we have: `find ./ -iname 'tests' -type d -prune -exec rm -rf {} \;`
        if($this->isFileBelongToTests($file)) {
            return false;
        }
        if(strpos($file, PIWIK_INCLUDE_PATH . "/tmp/") !== false) {
            return false;
        }

        if($this->isPluginSubmoduleAndThereforeNotFoundInFinalRelease($file)) {
            return false;
        }

        if($this->isFileBelongToComposerDevelopmentPackage($file)) {
            return false;
        }

        if($this->isFileDeletedFromPackage($file)) {
            return false;
        }

        return true;
    }

    /**
     * Plugins Submodule in Piwik codebase are not there in the release package,
     * (the plugins are released on the Marketplace.)
     *
     * @param $file
     * @return bool
     */
    private function isPluginSubmoduleAndThereforeNotFoundInFinalRelease($file)
    {
        if(strpos($file, PIWIK_INCLUDE_PATH . "/plugins/") === false) {
            return false;
        }

        $pluginName = str_replace(PIWIK_INCLUDE_PATH . "/plugins/", "", $file);
        $pluginName = substr($pluginName, 0, strpos($pluginName, "/"));

        $this->assertNotEmpty($pluginName, "Detected an empty plugin name from path: $file ");

        $pluginManager = Manager::getInstance();
        $notInPackagedRelease = $pluginManager->isPluginOfficialAndNotBundledWithCore($pluginName);

        // test that the submodule check works
        if($pluginName == 'VisitorGenerator') {
            $this->assertTrue($notInPackagedRelease, "Expected isPluginOfficialAndNotBundledWithCore to return true for VisitorGenerator plugin");
        }
        return $notInPackagedRelease;
    }

    /**
     * @param $file
     * @return bool
     */
    private function isFileBelongToComposerDevelopmentPackage($file)
    {
        $composerDependencyDevOnly = $this->getComposerRequireDevPackages();

        return $this->isFilePathFoundInArray($file, $composerDependencyDevOnly);
    }

    /**
     * @return array
     */
    private function getComposerRequireDevPackages()
    {
        $composerJson = $this->getComposerJsonAsArray();
        $composerDependencyDevOnly = array_keys($composerJson["require-dev"]);
        return $composerDependencyDevOnly;
    }

    /**
     * return true if $file is found within any sub-string in $filesToMatchAgainst,
     *
     * @param $file
     * @param $filesToMatchAgainst array
     * @return bool
     */
    private function isFilePathFoundInArray($file, $filesToMatchAgainst)
    {
        foreach ($filesToMatchAgainst as $devPackageName) {
            if (strpos($file, $devPackageName) !== false) {
                return true;
            }
        }
        return false;
    }

    /**
     * @param $file
     * @return bool
     */
    private function isFileDeletedFromPackage($file)
    {
        $filesDeletedFromPackage = array(
            // Should stay synchronised with: https://github.com/piwik/piwik-package/blob/master/scripts/build-package.sh#L104-L116
            'composer.phar',
            'vendor/twig/twig/test/',
            'vendor/twig/twig/doc/',
            'vendor/symfony/console/Symfony/Component/Console/Resources/bin',
            'vendor/doctrine/cache/.git',
            'vendor/mnapoli/php-di/.git',
            'vendor/mnapoli/php-di/website',
            'vendor/mnapoli/php-di/news',
            'vendor/mnapoli/php-di/doc',
            'vendor/tecnickcom/tcpdf/examples',
            'vendor/tecnickcom/tcpdf/CHANGELOG.txt',
            'vendor/guzzle/guzzle/docs/',

            // deleted fonts folders
            'vendor/tecnickcom/tcpdf/fonts/ae_fonts_2.0',
            'vendor/tecnickcom/tcpdf/fonts/dejavu-fonts-ttf-2.33',
            'vendor/tecnickcom/tcpdf/fonts/dejavu-fonts-ttf-2.34',
            'vendor/tecnickcom/tcpdf/fonts/freefont-20100919',
            'vendor/tecnickcom/tcpdf/fonts/freefont-20120503',

            // In the package script, there is a trailing * so any font matching will be deleted
            'vendor/tecnickcom/tcpdf/fonts/freemon',
            'vendor/tecnickcom/tcpdf/fonts/cid',
            'vendor/tecnickcom/tcpdf/fonts/courier',
            'vendor/tecnickcom/tcpdf/fonts/aefurat',
            'vendor/tecnickcom/tcpdf/fonts/dejavusansb',
            'vendor/tecnickcom/tcpdf/fonts/dejavusansi',
            'vendor/tecnickcom/tcpdf/fonts/dejavusansmono',
            'vendor/tecnickcom/tcpdf/fonts/dejavusanscondensed',
            'vendor/tecnickcom/tcpdf/fonts/dejavusansextralight',
            'vendor/tecnickcom/tcpdf/fonts/dejavuserif',
            'vendor/tecnickcom/tcpdf/fonts/freesansi',
            'vendor/tecnickcom/tcpdf/fonts/freesansb',
            'vendor/tecnickcom/tcpdf/fonts/freeserifb',
            'vendor/tecnickcom/tcpdf/fonts/freeserifi',
            'vendor/tecnickcom/tcpdf/fonts/pdf',
            'vendor/tecnickcom/tcpdf/fonts/times',
            'vendor/tecnickcom/tcpdf/fonts/uni2cid',
        );

        return $this->isFilePathFoundInArray($file, $filesDeletedFromPackage);
    }

    /**
     * @return array
     * @throws Exception
     */
    private function getAllFilesizes()
    {
        $files = Filesystem::globr(PIWIK_INCLUDE_PATH, '*');

        $filesizes = array();
        foreach ($files as $file) {

            if (!$this->isFileIncludedInFinalRelease($file)) {
                continue;
            }

            $filesize = filesize($file);

            if ($filesize === false) {
                throw new Exception("Error getting filesize for file: $file");
            }
            $filesizes[$file] = $filesize;
        }
        return $filesizes;
    }

    /**
     * @param $files
     * @throws Exception
     */
    protected function checkFilesDoNotHaveWeirdSpaces($files)
    {
        $weirdSpace = ' ';
        $this->assertEquals('c2a0', bin2hex($weirdSpace), "Checking that this test file was not tampered with");
        $this->assertEquals('20', bin2hex(' '), "Checking that this test file was not tampered with");

        $errors = array();
        $countFileChecked = 0;
        foreach ($files as $file) {

            if($this->isFileBelongToTests($file)) {
                continue;
            }

            if(strpos($file, 'vendor/php-di/php-di/website/') !== false) {
                continue;
            }

            $content = file_get_contents($file);
            $posWeirdSpace = strpos($content, $weirdSpace);
            if ($posWeirdSpace !== false) {
                $around = substr($content, $posWeirdSpace - 20, 40);
                $around = trim($around);
                $errors[] = "File $file contains an unusual space character, please remove it from here: ...$around...";
            }

            $countFileChecked++;
        }
        $this->assertTrue($countFileChecked > 42, "expected to test at least 100 files, but tested only " . $countFileChecked);

        if (!empty($errors)) {
            throw new Exception(implode(",\n\n ", $errors));
        }
    }

    /**
     * @param $file
     * @return bool
     */
    private function isFileBelongToTests($file)
    {
        return stripos($file, "/tests/") !== false;
    }

    /**
     * @return mixed
     */
    private function getComposerJsonAsArray()
    {
        $composer = file_get_contents(PIWIK_INCLUDE_PATH . '/composer.json');
        $composerJson = json_decode($composer, $assoc = true);
        return $composerJson;
    }

}