/**
  * Create DB connection and setup channel
  */
 static function setupBeforeClass()
 {
     parent::setupBeforeClass();
     if (!self::$uuid) {
         self::$uuid = self::createChannel('Aggregation', 'power', 100);
     }
 }
 /**
  * Create DB connection and setup channel
  */
 static function setupBeforeClass()
 {
     parent::setupBeforeClass();
     self::$testSize = round(self::TEST_DAYS * 24 * 3600 / self::TEST_SPACING);
     if (!self::$uuid) {
         self::$uuid = self::createChannel('Performance', 'power', 100);
     }
 }
 /**
  * Create DB connection and setup channel
  */
 static function setupBeforeClass()
 {
     parent::setupBeforeClass();
     self::$base = self::$context . '/' . static::$uuid . '.json?';
     if (!static::$uuid) {
         echo "Failure: need UUID before test.\nRun `phpunit Tests\\SetupPerformanceData` to generate.";
         die;
     }
     if (isset(self::$to)) {
         if (!is_numeric(self::$to)) {
             self::$to = strtotime(self::$to) * 1000;
         }
     }
 }