Author: Aydin Hassan (aydin@hotmail.co.uk)
Inheritance: extends PhpSchool\PhpWorkshop\Exercise\AbstractExercise, implements PhpSchool\PhpWorkshop\Exercise\ExerciseInterface, implements PhpSchool\PhpWorkshop\Exercise\CliExercise
 public function testGetters()
 {
     $this->assertEquals('Time Server', $this->exercise->getName());
     $this->assertEquals('Build a Time Server!', $this->exercise->getDescription());
     $this->assertEquals(ExerciseType::CLI, $this->exercise->getType());
     $this->assertInstanceOf(SolutionInterface::class, $this->exercise->getSolution());
     $this->assertFileExists(realpath($this->exercise->getProblem()));
     $this->assertNull($this->exercise->tearDown());
 }