Tests: added coverage

Use Code Climate for maintainability and coverage reports.

.github/workflows/main.yml

@@ -28,5 +28,8 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
-    - name: Run the default task
-      run: bundle exec rake
+    - uses: paambaati/codeclimate-action@master
+      env:
+        CC_TEST_REPORTER_ID: ce74ee3bee3aafbc805ece084e5e9a497bad09b089e2a7529e6087f926bc6f71
+      with:
+        coverageCommand: bundle exec rake

Gemfile

@@ -10,6 +10,8 @@ gem 'rake'
 group :test do
 	gem 'rspec'
 	gem 'rspec-its'
+
+	gem 'simplecov', require: false
 end
 
 group :development do

README.md

@@ -1,8 +1,11 @@
 # Magic::Lookup
 
-TODO: Delete this and the text below, and describe your gem
-
-Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/magic/lookup`. To experiment with that code, run `bin/console` for an interactive prompt.
+![Code Climate maintainability](
+	https://img.shields.io/codeclimate/maintainability-percentage/Alexander-Senko/magic-lookup
+)
+![Code Climate coverage](
+	https://img.shields.io/codeclimate/coverage/Alexander-Senko/magic-lookup
+)
 
 ## Installation
 

spec/spec_helper.rb

@@ -1,6 +1,11 @@
 # frozen_string_literal: true
 
 require 'rspec/its'
+require 'simplecov'
+
+SimpleCov.start do
+	add_filter 'spec'
+end
 
 require 'magic/lookup'