Append issue template to existing description

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/21733

Add two newlines before the template if the existing description isn't
empty. This makes it easier to see where the template begins.

Don't append the template when "Reset template" is selected, of course.

Don't append template if it equals the existing description. This makes
it so that selecting a template twice doesn't duplicate it.

1 files changed, 25 insertions, 5 deletions

diff --git a/spec/features/projects/issuable_templates_spec.rb b/spec/features/projects/issuable_templates_spec.rb
index f76c4fe8b57..cd79c4f512d 100644
--- a/spec/features/projects/issuable_templates_spec.rb
+++ b/spec/features/projects/issuable_templates_spec.rb
@@ -26,7 +26,7 @@ feature 'issuable templates', feature: true, js: true do
     scenario 'user selects "bug" template' do
       select_template 'bug'
       wait_for_ajax
-      preview_template
+      preview_template(template_content)
       save_changes
     end
 
@@ -42,6 +42,26 @@ feature 'issuable templates', feature: true, js: true do
     end
   end
 
+  context 'user creates an issue using templates, with a prior description' do
+    let(:prior_description) { 'test issue description' }
+    let(:template_content) { 'this is a test "bug" template' }
+    let(:issue) { create(:issue, author: user, assignee: user, project: project) }
+
+    background do
+      project.repository.commit_file(user, '.gitlab/issue_templates/bug.md', template_content, 'added issue template', 'master', false)
+      visit edit_namespace_project_issue_path project.namespace, project, issue
+      fill_in :'issue[title]', with: 'test issue title'
+      fill_in :'issue[description]', with: prior_description
+    end
+
+    scenario 'user selects "bug" template' do
+      select_template 'bug'
+      wait_for_ajax
+      preview_template("#{prior_description}\n\n#{template_content}")
+      save_changes
+    end
+  end
+
   context 'user creates a merge request using templates' do
     let(:template_content) { 'this is a test "feature-proposal" template' }
     let(:merge_request) { create(:merge_request, :with_diffs, source_project: project) }
@@ -55,7 +75,7 @@ feature 'issuable templates', feature: true, js: true do
     scenario 'user selects "feature-proposal" template' do
       select_template 'feature-proposal'
       wait_for_ajax
-      preview_template
+      preview_template(template_content)
       save_changes
     end
   end
@@ -82,16 +102,16 @@ feature 'issuable templates', feature: true, js: true do
         scenario 'user selects template' do
           select_template 'feature-proposal'
           wait_for_ajax
-          preview_template
+          preview_template(template_content)
           save_changes
         end
       end
     end
   end
 
-  def preview_template
+  def preview_template(expected_content)
     click_link 'Preview'
-    expect(page).to have_content template_content
+    expect(page).to have_content expected_content
   end
 
   def save_changes