Fix note form hint showing slash commands supported for commits

Signed-off-by: Rémy Coutable <remy@rymai.me>

CHANGELOG

@@ -14,6 +14,7 @@ v 8.12.0 (unreleased)
   - Filter tags by name !6121
   - Update gitlab shell secret file also when it is empty. !3774 (glensc)
   - Give project selection dropdowns responsive width, make non-wrapping.
+  - Fix note form hint showing slash commands supported for commits.
   - Make push events have equal vertical spacing.
   - API: Ensure invitees are not returned in Members API.
   - Add two-factor recovery endpoint to internal API !5510

app/helpers/notes_helper.rb

@@ -10,6 +10,10 @@ module NotesHelper
     Ability.can_edit_note?(current_user, note)
   end
 
+  def note_supports_slash_commands?(note)
+    Notes::SlashCommandsService.supported?(note, current_user)
+  end
+
   def noteable_json(noteable)
     {
       id: noteable.id,

app/services/notes/slash_commands_service.rb

@@ -5,9 +5,17 @@ module Notes
       'MergeRequest' => MergeRequests::UpdateService
     }
 
-    def supported?(note)
+    def self.noteable_update_service(note)
+      UPDATE_SERVICES[note.noteable_type]
+    end
+
+    def self.supported?(note, current_user)
       noteable_update_service(note) &&
-        can?(current_user, :"update_#{note.noteable_type.underscore}", note.noteable)
+        current_user.can?(:"update_#{note.noteable_type.underscore}", note.noteable)
+    end
+
+    def supported?(note)
+      self.class.supported?(note, current_user)
     end
 
     def extract_commands(note)
@@ -21,13 +29,7 @@ module Notes
       return if command_params.empty?
       return unless supported?(note)
 
-      noteable_update_service(note).new(project, current_user, command_params).execute(note.noteable)
-    end
-
-    private
-
-    def noteable_update_service(note)
-      UPDATE_SERVICES[note.noteable_type]
+      self.class.noteable_update_service(note).new(project, current_user, command_params).execute(note.noteable)
     end
   end
 end

app/views/projects/notes/_form.html.haml

+- supports_slash_commands = note_supports_slash_commands?(@note)
+
 = form_for [@project.namespace.becomes(Namespace), @project, @note], remote: true, html: { :'data-type' => 'json', multipart: true, id: nil, class: "new-note js-new-note-form js-quick-submit common-note-form", "data-noteable-iid" => @note.noteable.try(:iid), }, authenticity_token: true do |f|
   = hidden_field_tag :view, diff_view
   = hidden_field_tag :line_type
@@ -14,8 +16,8 @@
       attr: :note,
       classes: 'note-textarea js-note-text',
       placeholder: "Write a comment or drag your files here...",
-      supports_slash_commands: true
-    = render 'projects/notes/hints', supports_slash_commands: true
+      supports_slash_commands: supports_slash_commands
+    = render 'projects/notes/hints', supports_slash_commands: supports_slash_commands
     .error-alert
 
   .note-form-actions.clearfix

spec/features/projects/commits/note_spec.rb

+require 'spec_helper'
+
+describe 'Projects > Commits > Note' do
+  let(:project) { create(:project) }
+  let(:commit)  { project.commit('7d3b0f7cff5f37573aea97cebfd5692ea1689924') }
+
+  before do
+    login_as :user
+    project.team << [@user, :master]
+    visit namespace_project_commit_path(project.namespace, project, commit.id)
+  end
+
+  it 'says that only markdown is supported, not slash commands' do
+    expect(page).to have_content('Styling with Markdown is supported')
+  end
+end