Add specs for testing authorization and deny of chat user

changelogs/unreleased/add-chat-names.yml

+---
+title: Allow to connect Chat account with GitLab
+merge_request: 7450
+author:

spec/features/profiles/chat_names_spec.rb

+require 'rails_helper'
+
+feature 'Profile > Chat', feature: true do
+  given(:user) { create(:user) }
+  given(:service) { create(:service) }
+
+  before do
+    login_as(user)
+  end
+
+  describe 'uses authorization link' do
+    given(:params) do
+      { team_id: 'T00', team_domain: 'my_chat_team', user_id: 'U01', user_name: 'my_chat_user' }
+    end
+    given!(:authorize_url) { ChatNames::AuthorizeUserService.new(service, params).execute }
+    given(:authorize_path) { URI.parse(authorize_url).request_uri }
+
+    before do
+      visit authorize_path
+    end
+
+    context 'clicks authorize' do
+      before do
+        click_button 'Authorize'
+      end
+
+      scenario 'goes to list of chat names and see chat account' do
+        expect(page.current_path).to eq(profile_chat_names_path)
+        expect(page).to have_content('my_chat_team')
+        expect(page).to have_content('my_chat_user')
+      end
+
+      scenario 'second use of link is denied' do
+        visit authorize_path
+
+        expect(page).to have_http_status(:not_found)
+      end
+    end
+
+    context 'clicks deny' do
+      before do
+        click_button 'Deny'
+      end
+
+      scenario 'goes to list of chat names and do not see chat account' do
+        expect(page.current_path).to eq(profile_chat_names_path)
+        expect(page).not_to have_content('my_chat_team')
+        expect(page).not_to have_content('my_chat_user')
+      end
+
+      scenario 'second use of link is denied' do
+        visit authorize_path
+
+        expect(page).to have_http_status(:not_found)
+      end
+    end
+  end
+
+  describe 'visits chat accounts' do
+    given!(:chat_name) { create(:chat_name, user: user, service: service) }
+
+    before do
+      visit profile_chat_names_path
+    end
+
+    scenario 'sees chat user' do
+      expect(page).to have_content(chat_name.team_domain)
+      expect(page).to have_content(chat_name.chat_name)
+    end
+
+    scenario 'removes chat account' do
+      click_link 'Remove'
+
+      expect(page).to have_content("You don't have any active chat names.")
+    end
+  end
+end