/**
  * @test
  * @dataProvider lengthExamples
  */
 public function lengthWorks($input, $expected)
 {
     $helper = new StringHelper();
     $result = $helper->length($input);
     $this->assertSame($expected, $result);
 }
 /**
  * @test
  */
 public function md5Works()
 {
     $helper = new StringHelper();
     $result = $helper->md5('joh316');
     $this->assertSame('bacb98acf97e0b6112b1d1b650b84971', $result);
 }