IntegrationTestCase.php

        // change the language back to en
        if ($this->lastLanguage != 'en') {
            $this->changeLanguage('en');
        }

        if (!empty($this->missingExpectedFiles)) {
            $expectedDir = dirname(reset($this->missingExpectedFiles));
            $this->markTestIncomplete(" ERROR: Could not find expected API output '"
                . implode("', '", $this->missingExpectedFiles)
                . "'. For new tests, to pass the test, you can copy files from the processed/ directory into"
                . " $expectedDir  after checking that the output is valid. %s ");
        }

        // Display as one error all sub-failures
        if (!empty($this->comparisonFailures)) {
            $messages = '';
            $i = 1;
            foreach ($this->comparisonFailures as $failure) {
                $msg = $failure->getMessage();
                $msg = strtok($msg, "\n");
                $messages .= "\n#" . $i++ . ": " . $msg;
            }
            $messages .= " \n ";
            print($messages);
            $first = reset($this->comparisonFailures);
            throw $first;
        }
    }

    /**
     * changing the language within one request is a bit fancy
     * in order to keep the core clean, we need a little hack here
     *
     * @param string $langId
     */
    protected function changeLanguage($langId)
    {
        if ($this->lastLanguage != $langId) {
            $_GET['language'] = $langId;
            Piwik_Translate::reset();
            Piwik_Translate::getInstance()->reloadLanguage($langId);
        }

        $this->lastLanguage = $langId;
    }

    /**
     * Path where expected/processed output files are stored. Can be overridden.
     */
    public function getPathToTestDirectory()
    {
        return dirname(__FILE__) . DIRECTORY_SEPARATOR . 'Integration';
    }

    /**
     * Returns an array associating table names w/ lists of row data.
     *
     * @return array
     */
    protected static function getDbTablesWithData()
    {
        $result = array();
        foreach (Piwik::getTablesInstalled() as $tableName) {
            $result[$tableName] = Piwik_FetchAll("SELECT * FROM $tableName");
        }
        return $result;
    }

    /**
     * Truncates all tables then inserts the data in $tables into each
     * mapped table.
     *
     * @param array $tables Array mapping table names with arrays of row data.
     */
    protected static function restoreDbTables($tables)
    {
        // truncate existing tables
        Piwik::truncateAllTables();

        // insert data
        $existingTables = Piwik::getTablesInstalled();
        foreach ($tables as $table => $rows) {
            // create table if it's an archive table
            if (strpos($table, 'archive_') !== false && !in_array($table, $existingTables)) {
                $tableType = strpos($table, 'archive_numeric') !== false ? 'archive_numeric' : 'archive_blob';

                $createSql = Piwik::getTableCreateSql($tableType);
                $createSql = str_replace(Piwik_Common::prefixTable($tableType), $table, $createSql);
                Piwik_Query($createSql);
            }

            if (empty($rows)) {
                continue;
            }

            $rowsSql = array();
            foreach ($rows as $row) {
                $values = array();
                foreach ($row as $name => $value) {
                    if (is_null($value)) {
                        $values[] = 'NULL';
                    } else if (is_numeric($value)) {
                        $values[] = $value;
                    } else if (!ctype_print($value)) {
                        $values[] = "x'" . bin2hex(substr($value, 1)) . "'";
                    } else {
                        $values[] = "'$value'";
                    }
                }

                $rowsSql[] = "(" . implode(',', $values) . ")";
            }

            $sql = "INSERT INTO $table VALUES " . implode(',', $rowsSql);
            Piwik_Query($sql);
        }
    }

    /**
     * Drops all archive tables.
     */
    public static function deleteArchiveTables()
    {
        foreach (Piwik_DataAccess_ArchiveTableCreator::getTablesArchivesInstalled() as $table) {
            Piwik_Query("DROP TABLE IF EXISTS $table");
        }

        Piwik_DataAccess_ArchiveTableCreator::refreshTableList($forceReload = true);
    }

}