/**
  * @dataProvider outputVerbosityDataProvider
  */
 public function testIsVeryVerbose($verbosity_level)
 {
     $this->output->getVerbosity()->willReturn($verbosity_level)->shouldBeCalled();
     $actual = $this->io->isVeryVerbose();
     if ($verbosity_level >= OutputInterface::VERBOSITY_VERY_VERBOSE) {
         $this->assertTrue($actual, 'Output should be very verbose.');
     } else {
         $this->assertFalse($actual, 'Output should not be very verbose.');
     }
 }