https://hackernoon.com/add-badges-for-travisci-coveralls-and-code-climate-to-your-readme-ruby-6d27caad74ed

To monitor your code and show its quality in your Github Readmes you can add badges, such as for Travis CI (to show build status and test reports), Coveralls (code coverage reports), and Code Climate (code quality, a measurement out of 4). As well as seeing the status of your project’s code, clicking on the badges allow users to see detailed reports on these websites.

This tutorial shows you how to set up your project with these code reports. As well as this, it includes instructions for adding SimpleCov for code coverage data in your terminal and how to configure RSpec to print out more verbose test reports. This example is for ruby projects, but can be easily adapted to other languages. My Ruby tic tac toe tech test is one project where I used this setup.