1 files changed, 37 insertions, 0 deletions
diff --git a/spec/support/dropzone_helper.rb b/spec/support/dropzone_helper.rb
new file mode 100644
index 00000000000..984ec7d2741
--- /dev/null
+++ b/spec/support/dropzone_helper.rb
@@ -0,0 +1,37 @@
+module DropzoneHelper
+  # Provides a way to perform `attach_file` for a Dropzone-based file input
+  #
+  # This is accomplished by creating a standard HTML file input on the page,
+  # performing `attach_file` on that field, and then triggering the appropriate
+  # Dropzone events to perform the actual upload.
+  #
+  # This method waits for the upload to complete before returning.
+  def dropzone_file(file_path)
+    # Generate a fake file input that Capybara can attach to
+    page.execute_script <<-JS.strip_heredoc
+      var fakeFileInput = window.$('<input/>').attr(
+        {id: 'fakeFileInput', type: 'file'}
+      ).appendTo('body');
+
+      window._dropzoneComplete = false;
+    JS
+
+    # Attach the file to the fake input selector with Capybara
+    attach_file('fakeFileInput', file_path)
+
+    # Manually trigger a Dropzone "drop" event with the fake input's file list
+    page.execute_script <<-JS.strip_heredoc
+      var fileList = [$('#fakeFileInput')[0].files[0]];
+      var e = jQuery.Event('drop', { dataTransfer : { files : fileList } });
+
+      var dropzone = $('.div-dropzone')[0].dropzone;
+      dropzone.on('queuecomplete', function() {
+        window._dropzoneComplete = true;
+      });
+      dropzone.listeners[0].events.drop(e);
+    JS
+
+    # Wait until Dropzone's fired `queuecomplete`
+    loop until page.evaluate_script('window._dropzoneComplete === true')
+  end
+end