Feature Tasks and Requirements:

Create an encrypt function that takes in a plain text phrase and a numeric shift.
- the phrase will then be shifted that many letters.
  - E.g. encrypt(‘abc’,1) would return ‘bcd’ = E.g. encrypt(‘abc’, 10) would return ‘klm’
- shifts that exceed 26 should wrap around
  - E.g. encrypt(‘abc’,27) would return ‘bcd’
- shifts that push a letter out or range should wrap around
  - E.g. encrypt(‘zzz’,1) would return ‘aaa’
Create a decrypt function that takes in encrypted text and numeric shift which will restore the encrypted text back to its original form when correct key is supplied.
create a crack function that will decode the cipher so that an encrypted message can be transformed into its original state WITHOUT access to the key.
Devise a method for the computer to determine if code was broken with minimal human guidance.

The application must…

encrypt a string with a given shift
decrypt a previously encrypted string with the same shift
encryption should handle upper and lower case letters
encryption should allow non-alpha characters but ignore them, including white space
decrypt encrypted version of It was the best of times, it was the worst of times. WITHOUT knowing the shift used.
refer to supplied unit tests.

PR: #1