public void ReturnLengthsAndUppercaseStrings() { var sut = new StringProcessor(); var inputStrings = new List <string> { "Hello", "Welcome", "Howdy" }; var results = sut.ToUpperAndWithLength(inputStrings); Assert.Equal(3, results.Count); Assert.Equal("5-HELLO", results[0]); Assert.Equal("7-WELCOME", results[1]); Assert.Equal("5-HOWDY", results[2]); }