New E2E to test copying snippet file contents

See https://gitlab.com/gitlab-org/quality/testcases/-/issues/1099

app/assets/javascripts/blob/components/blob_header_default_actions.vue

@@ -50,7 +50,7 @@ export default {
 };
 </script>
 <template>
-  <gl-button-group>
+  <gl-button-group data-qa-selector="default_actions_container">
     <gl-button
       v-if="!hasRenderError"
       v-gl-tooltip.hover
@@ -59,6 +59,7 @@ export default {
       :disabled="copyDisabled"
       :data-clipboard-target="getBlobHashTarget"
       data-testid="copyContentsButton"
+      data-qa-selector="copy_contents_button"
       icon="copy-to-clipboard"
       category="primary"
       variant="default"

qa/qa/page/component/snippet.rb

@@ -78,6 +78,11 @@ module QA
           base.view 'app/assets/javascripts/snippets/components/embed_dropdown.vue' do
             element :copy_button
           end
+
+          base.view 'app/assets/javascripts/blob/components/blob_header_default_actions.vue' do
+            element :default_actions_container
+            element :copy_contents_button
+          end
         end
 
         def has_snippet_title?(snippet_title)
@@ -182,7 +187,10 @@ module QA
         def add_comment(comment)
           fill_element(:note_field, comment)
           click_element(:comment_button)
-          wait_until(reload: false) { has_element?(:note_author_content) }
+
+          unless has_element?(:note_author_content)
+            raise ElementNotFound, "Comment did not appear as expected"
+          end
         end
 
         def has_comment_author?(author_username)
@@ -207,7 +215,10 @@ module QA
           click_element(:edit_comment_button)
           fill_element(:edit_note_field, comment)
           click_element(:save_comment_button)
-          wait_until(reload: false) { has_element?(:note_author_content) }
+
+          unless has_element?(:note_author_content)
+            raise ElementNotFound, "Comment did not appear as expected"
+          end
         end
 
         def delete_comment(comment)
@@ -215,7 +226,32 @@ module QA
           accept_alert do
             click_element(:delete_comment_button)
           end
-          wait_until(reload: false) { has_no_text?(comment) }
+
+          unless has_no_element?(:note_content, text: comment)
+            raise ElementNotFound, "Comment was not removed as expected"
+          end
+        end
+
+        def click_copy_file_contents(file_number = nil)
+          if file_number
+            within_element_by_index(:default_actions_container, file_number - 1) do
+              click_element(:copy_contents_button)
+            end
+          else
+            within_element(:default_actions_container) do
+              click_element(:copy_contents_button)
+            end
+          end
+        end
+
+        def copy_file_contents_to_comment(file_number = nil)
+          click_copy_file_contents(file_number)
+          send_keys_to_element(:note_field, [:shift, :insert])
+          click_element(:comment_button)
+
+          unless has_element?(:note_author_content)
+            raise ElementNotFound, "Comment did not appear as expected"
+          end
         end
       end
     end

qa/qa/specs/features/browser_ui/3_create/snippet/copy_snippet_file_contents_spec.rb

+# frozen_string_literal: true
+
+module QA
+  RSpec.describe 'Create' do
+    describe 'Multiple file snippet' do
+      let(:first_file_content) { 'First file content' }
+      let(:second_file_content) { 'Second file content' }
+      let(:third_file_content) { 'Third file content' }
+
+      let(:personal_snippet) do
+        Resource::Snippet.fabricate_via_api! do |snippet|
+          snippet.title = 'Personal snippet to copy file contents from'
+          snippet.file_name = 'First file name'
+          snippet.file_content = first_file_content
+
+          snippet.add_files do |files|
+            files.append(name: 'Second file name', content: second_file_content)
+            files.append(name: 'Third file name', content: third_file_content)
+          end
+        end
+      end
+
+      let(:project_snippet) do
+        Resource::ProjectSnippet.fabricate_via_api! do |snippet|
+          snippet.title = 'Project snippet to copy file contents from'
+          snippet.file_name = 'First file name'
+          snippet.file_content = first_file_content
+
+          snippet.add_files do |files|
+            files.append(name: 'Second file name', content: second_file_content)
+            files.append(name: 'Third file name', content: third_file_content)
+          end
+        end
+      end
+
+      let(:files) do
+        [
+            {
+                number: 1,
+                content: first_file_content
+            },
+            {
+                number: 2,
+                content: second_file_content
+            },
+            {
+                number: 3,
+                content: third_file_content
+            }
+        ]
+      end
+
+      before do
+        Flow::Login.sign_in
+      end
+
+      shared_examples 'copying snippet file contents' do |snippet_type|
+        it "copies file contents of a multi-file #{snippet_type} to a comment and verifies them" do
+          send(snippet_type).visit!
+
+          files.each do |files|
+            Page::Dashboard::Snippet::Show.perform do |snippet|
+              snippet.copy_file_contents_to_comment(files[:number])
+              expect(snippet).to have_comment_content(files[:content])
+              snippet.delete_comment(files[:content])
+            end
+          end
+        end
+      end
+
+      it_behaves_like 'copying snippet file contents', :personal_snippet
+      it_behaves_like 'copying snippet file contents', :project_snippet
+    end
+  end
+end

qa/qa/specs/features/browser_ui/3_create/snippet/share_snippet_spec.rb

@@ -7,7 +7,7 @@ module QA
         Resource::Snippet.fabricate! do |snippet|
           snippet.title = 'Shared snippet'
           snippet.visibility = 'Public'
-          snippet.file_content = 'code.py'
+          snippet.file_name = 'code.py'
           snippet.file_content = 'code to be shared'
         end
       end