Add tests for shares_controller (#7835)

spec/controllers/shares_controller_spec.rb

+require 'rails_helper'
+
+describe SharesController do
+  render_views
+
+  let(:user) { Fabricate(:user) }
+  before { sign_in user }
+
+  describe 'GTE #show' do
+    subject(:initial_state_json) { JSON.parse(assigns(:initial_state_json), symbolize_names: true) }
+    subject(:body_classes) { assigns(:body_classes) }
+
+    before { get :show, params: { title: 'test title', text: 'test text', url: 'url1 url2' } }
+
+    it 'assigns json' do
+      expect(response).to have_http_status :ok
+      expect(initial_state_json[:compose][:text]).to eq 'test title test text url1 url2'
+      expect(initial_state_json[:meta][:me]).to eq user.account.id.to_s
+      expect(body_classes).to eq 'modal-layout compose-standalone'
+    end
+  end
+end