From 091a522cbfd77c7af454a9771d2b1998c8bba3b2 Mon Sep 17 00:00:00 2001
From: simon lehericey <mail@simon.lehericey.net>
Date: Thu, 27 Oct 2022 22:23:25 +0200
Subject: [PATCH] conf(capybara): add MAKE_IT_SLOW option to reveal bugs

---
 README.md                |  4 ++++
 spec/support/capybara.rb | 26 ++++++++++++++++++--------
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index 4ccc423d5..a78769236 100644
--- a/README.md
+++ b/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
diff --git a/spec/support/capybara.rb b/spec/support/capybara.rb
index 66ef268f7..3fcaf9368 100644
--- a/spec/support/capybara.rb
+++ b/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|
-    # Set download dir for Chrome < 77
-    driver.browser.download_path = download_path
-  end
+  setup_driver(app, download_path, options)
 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|
-    # Set download dir for Chrome < 77
-    driver.browser.download_path = download_path
-  end
+  setup_driver(app, download_path, options)
 end
 
 Capybara.default_max_wait_time = 2