tsuhachev · February 5, 2012 12:48 · Dec 13, 2011 · Nov 17, 2011 · Nov 17, 2011
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -1,4 +1,4 @@
-# in features/env.rb
+# in features/support/env.rb
 require 'selenium/webdriver'
 
 # we need a firefox extension to start intercepting javascript errors before the page

diff --git a/gistfile1.rb b/gistfile1.rb
@@ -2,7 +2,7 @@
 require 'selenium/webdriver'
 
 # we need a firefox extension to start intercepting javascript errors before the page
-# script load
+# scripts load
 Capybara.register_driver :selenium do |app|
   profile = Selenium::WebDriver::Firefox::Profile.new
   # see https://github.com/mguillem/JSErrorCollector

diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,28 @@
+# in features/env.rb
+require 'selenium/webdriver'
+
+# we need a firefox extension to start intercepting javascript errors before the page
+# script load
+Capybara.register_driver :selenium do |app|
+  profile = Selenium::WebDriver::Firefox::Profile.new
+  # see https://github.com/mguillem/JSErrorCollector
+  profile.add_extension File.join(Rails.root, "features/support/extensions/JSErrorCollector.xpi")
+  Capybara::Selenium::Driver.new app, :profile => profile
+end
+
+After do |scenario|
+  if page.driver.to_s.match("Selenium")
+    errors = page.execute_script("return window.JSErrorCollector_errors.pump()")
+
+    if errors.any?
+      puts '-------------------------------------------------------------'
+      puts "Found #{errors.length} javascript #{pluralize(errors.length, 'error')}"
+      puts '-------------------------------------------------------------'
+      errors.each do |error|
+        puts "    #{error["errorMessage"]} (#{error["sourceName"]}:#{error["lineNumber"]})"
+      end
+      raise "Javascript #{pluralize(errors.length, 'error')} detected, see above"
+    end
+
+  end
+end