public function testFilteredLsExercise()
{
$e = new FilteredLs($this->filesystem);
$this->assertEquals('Filtered LS', $e->getName());
$this->assertEquals('Read files in a folder and filter by a given extension', $e->getDescription());
$this->assertEquals(ExerciseType::CLI, $e->getType());
$this->assertInstanceOf(SolutionInterface::class, $e->getSolution());
$this->assertFileExists(realpath($e->getProblem()));
$this->assertNull($e->tearDown());
}