Merge pull request #26703 from eileencodes/rails_system_tests

WIP: Capybara Integration with Rails (AKA System Tests)

1 files changed, 57 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb b/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
new file mode 100644
index 0000000000..784005cb93
--- /dev/null
+++ b/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
@@ -0,0 +1,57 @@
+module ActionDispatch
+  module SystemTesting
+    module TestHelpers
+      # Screenshot helper for system testing
+      module ScreenshotHelper
+        # Takes a screenshot of the current page in the browser.
+        #
+        # +take_screenshot+ can be used at any point in your system tests to take
+        # a screenshot of the current state. This can be useful for debugging or
+        # automating visual testing.
+        def take_screenshot
+          save_image
+          puts "[Screenshot]: #{image_path}"
+          puts display_image
+        end
+
+        # Takes a screenshot of the current page in the browser if the test
+        # failed.
+        #
+        # +take_failed_screenshot+ is included in <tt>application_system_test_case.rb</tt>
+        # that is generated with the application. To take screenshots when a test
+        # fails add +take_failed_screenshot+ to the teardown block before clearing
+        # sessions.
+        def take_failed_screenshot
+          take_screenshot unless passed?
+        end
+
+        private
+          def image_name
+            passed? ? method_name : "failures_#{method_name}"
+          end
+
+          def image_path
+            "tmp/screenshots/#{image_name}.png"
+          end
+
+          def save_image
+            page.save_screenshot(Rails.root.join(image_path))
+          end
+
+          def display_image
+            if ENV["CAPYBARA_INLINE_SCREENSHOT"] == "artifact"
+              "\e]1338;url=artifact://#{image_path}\a"
+            else
+              name = inline_base64(File.basename(image_path))
+              image = inline_base64(File.read(image_path))
+              "\e]1337;File=name=#{name};height=400px;inline=1:#{image}\a"
+            end
+          end
+
+          def inline_base64(path)
+            Base64.encode64(path).gsub("\n", "")
+          end
+      end
+    end
+  end
+end