Merge pull request #907 from hlascelles/add-local-test-documentation

Add specs and linter documentation

Author: rafaelfranca

CONTRIBUTING.md

@@ -13,3 +13,20 @@ Here are some reasons why a pull request may not be merged:
 If you would like to help in this process, you can start by evaluating open pull requests against the criteria above. For example, if a pull request does not include specs for new functionality, you can add a comment like: “If you would like this feature to be added to Thor, please add specs to ensure that it does not break in the future.” This will help move a pull request closer to being merged.
 
 Include this emoji in the top of your ticket to signal to us that you read this file: 🌈
+
+Specs
+-----
+
+Ensure that all specs and code linting checks pass before submitting a pull request.
+
+To execute the specs locally, run:
+
+```bash
+bundle exec rspec
+```
+
+Linting checks are done with RuboCop. To run the linter, use:
+
+```bash
+bundle exec rubocop
+```