1
exercism fetch ruby diamond

Diamond

The diamond kata takes as its input a letter, and outputs it in a diamond shape. Given a letter, it prints a diamond starting with 'A', with the supplied letter at the widest point.

Requirements

Examples

In the following examples, spaces are indicated by · characters.

Diamond for letter 'A':

1
A

Diamond for letter 'C':

1
2
3
4
5
··A··
·B·B·
C···C
·B·B·
··A··

Diamond for letter 'E':

1
2
3
4
5
6
7
8
9
····A····
···B·B···
··C···C··
·D·····D·
E·······E
·D·····D·
··C···C··
···B·B···
····A····

For installation and learning resources, refer to the exercism help page.

For running the tests provided, you will need the Minitest gem. Open a terminal window and run the following command to install minitest:

1
gem install minitest

If you would like color output, you can require 'minitest/pride' in the test file, or note the alternative instruction, below, for running the test file.

In order to run the test, you can run the test file from the exercise directory. For example, if the test suite is called hello_world_test.rb, you can run the following command:

1
ruby hello_world_test.rb

To include color from the command line:

1
ruby -r minitest/pride hello_world_test.rb

Source

Seb Rose http://claysnow.co.uk/recycling-tests-in-tdd/

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.