conf(capybara): add MAKE_IT_SLOW option to reveal bugs

README.md

@@ -122,6 +122,10 @@ Pour exécuter les tests de l'application, plusieurs possibilités :
 
         JS_LOG=error bin/rspec spec/system
 
+- Augmenter la latence lors de tests end2end pour déceler des bugs récalcitrants
+
+        MAKE_IT_SLOW=1 bin/rspec spec/system
+
 ### Ajout de taches à exécuter au déploiement
 
         rails generate after_party:task task_name

spec/support/capybara.rb

@@ -3,6 +3,22 @@ require 'capybara-screenshot/rspec'
 require 'capybara/email/rspec'
 require 'selenium/webdriver'
 
+def setup_driver(app, download_path, options)
+  Capybara::Selenium::Driver.new(app, browser: :chrome, options:).tap do |driver|
+    # Set download dir for Chrome < 77
+    driver.browser.download_path = download_path
+
+    if ENV['MAKE_IT_SLOW'].present?
+      driver.browser.network_conditions = {
+        offline: false,
+        latency: 800,
+        download_throughput: 1024000,
+        upload_throughput: 1024000
+      }
+    end
+  end
+end
+
 Capybara.register_driver :chrome do |app|
   options = Selenium::WebDriver::Chrome::Options.new
   options.add_argument('--no-sandbox') unless ENV['SANDBOX']
@@ -15,10 +31,7 @@ Capybara.register_driver :chrome do |app|
   options.add_preference('download.default_directory', download_path)
   options.add_preference(:download, default_directory: download_path)
 
-  Capybara::Selenium::Driver.new(app, browser: :chrome, options: options).tap do |driver|
+  setup_driver(app, download_path, options)
-    # Set download dir for Chrome < 77
-    driver.browser.download_path = download_path
-  end
 end
 
 Capybara.register_driver :headless_chrome do |app|
@@ -36,10 +49,7 @@ Capybara.register_driver :headless_chrome do |app|
   options.add_preference('download.default_directory', download_path)
   options.add_preference(:download, default_directory: download_path)
 
-  Capybara::Selenium::Driver.new(app, browser: :chrome, options: options).tap do |driver|
+  setup_driver(app, download_path, options)
-    # Set download dir for Chrome < 77
-    driver.browser.download_path = download_path
-  end
 end
 
 Capybara.default_max_wait_time = 2