Author: Victor Bocharsky (bocharsky.bw@gmail.com)
Inheritance: extends AbstractNamingStrategy
 public function testGetFileFormat()
 {
     $strategy = new DatetimeNamingStrategy(DatetimeNamingStrategy::FORMAT_DIR_YEAR_MONTH);
     $this->assertEquals(DatetimeNamingStrategy::FORMAT_FILE_TIME_MICROSECONDS, $strategy->getFileFormat());
     $strategy = new DatetimeNamingStrategy(DatetimeNamingStrategy::FORMAT_DIR_YEAR_MONTH, DatetimeNamingStrategy::FORMAT_FILE_TIMESTAMP_MICROSECONDS);
     $this->assertEquals(DatetimeNamingStrategy::FORMAT_FILE_TIMESTAMP_MICROSECONDS, $strategy->getFileFormat());
 }