Initial try to add testing

.rspec

@@ -0,0 +1 @@
+--require spec_helper

Gemfile

@@ -16,3 +16,14 @@ end
 gem 'classifier-reborn'
 gem 'gsl'
 gem 'html-proofer'
+
+group :development, :test do
+  gem 'html-proofer'  
+  gem "rspec"
+  gem "selenium-webdriver"
+  gem "webdrivers"
+  gem "puma"
+  gem "capybara"
+  gem "rack-jekyll"
+  gem "pry"
+end

spec/index_spec.rb

@@ -0,0 +1,9 @@
+describe "index", type: :feature, js: true do
+  it "has the page title" do
+    visit '/'
+    # `binding.pry` is useful for crafting the right selector
+    # or checking the actual state of the page
+    binding.pry # test will pause here
+    expect(find('.post-link').text).to eq('Welcome to Jekyll!')
+  end
+end

spec/spec_helper.rb

@@ -0,0 +1,57 @@
+# Require all of the necessary gems
+require 'rspec'
+require 'capybara/rspec'
+require 'rack/jekyll'
+require 'rack/test'
+require 'pry'
+require 'webdrivers'
+
+RSpec.configure do |config|
+  config.expect_with :rspec do |expectations|
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+  config.mock_with :rspec do |mocks|
+    mocks.verify_partial_doubles = true
+  end
+  # Configure Capybara to use Selenium.
+  Capybara.register_driver :selenium do |app|
+    chrome_prefs = {
+      'download' => {
+        'default_directory' => './support/',
+        'prompt_for_download' => false
+      },
+      'profile' => {
+        'default_content_settings' => { 'multiple-automatic-downloads': 1 }, # for chrome version olde ~42
+        'default_content_setting_values' => { 'automatic_downloads': 1 }, # for chrome newe 46
+        'password_manager_enabled' => false
+      },
+      'safebrowsing' => {
+        'enabled' => false,
+        'disable_download_protection' => true
+      }
+    }
+
+    # Set headless with docker friendly args.
+    chrome_args = %w[window-size=1024,768 disable-gpu no-sandbox disable-translate no-default-browser-check disable-popup-blocking]
+    # To run full browser instead of headless mode, run this command: HEADLESS=false rspec spec
+    unless ENV.fetch('HEADLESS', 'true') == 'false'
+      chrome_args += %w[headless]
+    end
+
+    # Initialize chromedriver.
+    capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(
+      chromeOptions: {
+        prefs: chrome_prefs,
+        args: chrome_args
+      }
+    )
+    driver = Capybara::Selenium::Driver.new(app, browser: :chrome, desired_capabilities: capabilities)
+
+    driver
+  end
+  # Configure Capybara to load the website through rack-jekyll.
+  # (force_build: true) builds the site before the tests are run,
+  # so our tests are always running against the latest version
+  # of our jekyll site.
+  Capybara.app = Rack::Jekyll.new(force_build: true)
+end