Imports System Imports Xunit Public Class AffineCipherTests Public Sub Encode_yes() Assert.Equal("xbt", Encode("yes", 5, 7)) End Sub Public Sub Encode_no() Assert.Equal("fu", Encode("no", 15, 18)) End Sub Public Sub Encode_omg() Assert.Equal("lvz", Encode("OMG", 21, 3)) End Sub Public Sub Encode_o_m_g() Assert.Equal("hjp", Encode("O M G", 25, 47)) End Sub Public Sub Encode_mindblowingly() Assert.Equal("rzcwa gnxzc dgt", Encode("mindblowingly", 11, 15)) End Sub Public Sub Encode_numbers() Assert.Equal("jqgjc rw123 jqgjc rw", Encode("Testing,1 2 3, testing.", 3, 4)) End Sub Public Sub Encode_deep_thought() Assert.Equal("iynia fdqfb ifje", Encode("Truth is fiction.", 5, 17)) End Sub Public Sub Encode_all_the_letters() Assert.Equal("swxtj npvyk lruol iejdc blaxk swxmh qzglf", Encode("The quick brown fox jumps over the lazy dog.", 17, 33)) End Sub Public Sub Encode_with_a_not_coprime_to_m() Assert.Throws(Of ArgumentException)(Function() Encode("This is a test.", 6, 17)) End Sub Public Sub Decode_exercism() Assert.Equal("exercism", Decode("tytgn fjr", 3, 7)) End Sub Public Sub Decode_a_sentence() Assert.Equal("anobstacleisoftenasteppingstone", Decode("qdwju nqcro muwhn odqun oppmd aunwd o", 19, 16)) End Sub Public Sub Decode_numbers() Assert.Equal("testing123testing", Decode("odpoz ub123 odpoz ub", 25, 7)) End Sub Public Sub Decode_all_the_letters() Assert.Equal("thequickbrownfoxjumpsoverthelazydog", Decode("swxtj npvyk lruol iejdc blaxk swxmh qzglf", 17, 33)) End Sub Public Sub Decode_with_no_spaces_in_input() Assert.Equal("thequickbrownfoxjumpsoverthelazydog", Decode("swxtjnpvyklruoliejdcblaxkswxmhqzglf", 17, 33)) End Sub Public Sub Decode_with_too_many_spaces() Assert.Equal("jollygreengiant", Decode("vszzm cly yd cg qdp", 15, 16)) End Sub Public Sub Decode_with_a_not_coprime_to_m() Assert.Throws(Of ArgumentException)(Function() Decode("Test", 13, 5)) End Sub End Class