Rewrite mobile id spec to a test

test/integration/registrar/sign_in_test.rb

@@ -0,0 +1,32 @@
+require 'test_helper'
+
+class SignInTest < ActionDispatch::IntegrationTest
+  def setup
+    super
+    WebMock.allow_net_connect!
+
+    @user = users(:api_bestnames)
+    @user.identity_code = '1234'
+    @user.save
+  end
+
+  def test_mobile_id_sign_in_page
+    mock_client = Minitest::Mock.new
+    mock_client.expect(:authenticate, OpenStruct.new(user_id_code: '1234'),
+                       [{ phone: "+3721234",
+                         message_to_display: "Authenticating",
+                         service_name: "Testimine" }])
+    mock_client.expect(:session_code, 1234)
+
+    Digidoc::Client.stub(:new, mock_client) do
+      visit registrar_login_path
+
+      click_on 'login-with-mobile-id-btn'
+
+      fill_in 'user[phone]', with: '1234'
+      click_button 'Login'
+
+      assert(page.has_text?('Confirmation sms was sent to your phone. Verification code is'))
+    end
+  end
+end