/rubytest

A code challenge for BrightBytes engineering applicants.

Primary LanguageRuby

Setup

  1. Clone this repository into a public repository in your github account
  2. Follow the test instructions below.

Instructions

  1. Create a new branch named step_1.

    • Create a simple String calculator with a method add(numbers) that takes a string.
    • The method can take 0, 1 or 2 numbers, and will return their sum (for an empty string it will return 0) for example "" or "1" or "1,2".
    • Start with the simplest test case of an empty string and move to 1 and two numbers.
    • Commit with the comment Step 1 and push this branch.

  2. Create a new branch based on step_1 named step_2.

    • Allow the add method to handle an unknown amount of numbers.
    • Commit with the comment Step 2 and push this branch.

  3. Create a new branch based on step_2 named step_3.

    • Allow the add method to handle new lines between numbers (instead of commas).
    • the following input is ok: 1\n2,3 (will equal 6).
    • the following input is NOT ok: 1,\n.
    • Make sure you only test for correct inputs. There is no need to test for invalid inputs.
    • Commit with the comment Step 3 and push this branch.

  4. Create a new branch based on step_3 named step_4.

    • Allow the add method to handle a different delimiter:
    • to change a delimiter, the beginning of the string will contain a separate line that looks like this: //[delimiter]\n[numbers…] for example //;\n1;2 should return three where the default delimiter is ; .
    • the first line is optional. all existing scenarios should still be supported
    • Commit with the comment Step 4 and push this branch.

  5. Create a new branch based on step_4 named step_5.

    • Calling add with a negative number will throw an exception “negatives not allowed” – and the negative that was passed. If there are multiple negatives, show all of them in the exception message.
    • Commit with the comment Step 5 and push this branch.