blog_rails_api_auth_pt_1_9.rb

# /spec/requests/v1/users_requests_spec.rb

context 'with errors' do
  context 'such as a pre-existing email' do
    it 'returns a 422 response and JSON for errors' do
      existing_user = create(:user)

      user_attributes = {
        user: {
          email: existing_user.email,
          password: user.password_digest
        }
      }.to_json

      post(users_url, user_attributes, accept_headers)

      expect(response).to have_http_status :unprocessable_entity
      expect(json_value_at_path('errors/0')).to eq 'Email has already been taken'
    end
  end
end