Create a feature spec for "/tag"

spec/features/commits/user_uses_slash_commands_spec.rb

+require 'rails_helper'
+
+describe 'Commit > User uses quick actions', :js do
+  include Spec::Support::Helpers::Features::NotesHelpers
+  include RepoHelpers
+
+  let(:project) { create(:project, :public, :repository) }
+  let(:user) { project.creator }
+  let(:commit) { project.commit }
+
+  before do
+    project.add_maintainer(user)
+    sign_in(user)
+
+    visit project_commit_path(project, commit.id)
+  end
+
+  describe 'Tagging a commit' do
+    let(:tag_name) { 'v1.2.3' }
+    let(:tag_message) { 'Stable release' }
+    let(:truncated_commit_sha) { Commit.truncate_sha(commit.sha) }
+
+    it 'tags this commit' do
+      add_note("/tag #{tag_name} #{tag_message}")
+
+      expect(page).to have_content 'Commands applied'
+      expect(page).to have_content "tagged commit #{truncated_commit_sha}"
+      expect(page).to have_content tag_name
+
+      visit project_tag_path(project, tag_name)
+      expect(page).to have_content tag_name
+      expect(page).to have_content tag_message
+      expect(page).to have_content truncated_commit_sha
+    end
+  end
+end