Welcome to the challenge!

Your pull request with your solution is warmly welcome!

We are already looking forward to YOUR solution!

Any questions? Ask them in the "issues" tab.

Setup

git clone git@github.com:renuo/christmas_tree.git
cd christmas_tree
gem install bundler
bundle install

Christmas tree 🌲

Although, it's not christmas yet, we still hope you'll have fun while solving this challenge. 😎

Basis

Small ruby app, where the tests are partially set up.

Task

You are to write a function that returns a christmas tree "drawn" with ASCII art. Try to develop test-driven (TDD) with Ruby.

Input

Your method should accept as its first argument a string, which defines the height of the christmas tree.

Output

The implemented function should return the christmas tree as a string.

ChristmasTree.draw(5)

The ouput should then looks as follows:

    X
   XXX
  XXXXX
 XXXXXXX
XXXXXXXXX

Advanced

Slowly the tree takes shape. If you want to go one step further, your task would be to complete the tree by adding a tree stand and a star on top of the tree.

Accordingly, you could add optional arguments to the function, which would determine whether the tree shall have a tree stand and/or a star.

ChristmasTree.draw(height: 5, tree_stand: true, star: true)

Having both arguments set to true, this should output the following:

    *
    X
   XXX
  XXXXX
 XXXXXXX
XXXXXXXXX
    |

Don't forget to write a test first for this exercise! 👨🏻‍💻 👩🏼‍💻

Run tests

bundle exec rspec

Credits

Challenge from https://ccd-school.de/coding-dojo/function-katas/tannenbaum/, adapted by simon-isler