A lot :)

test/controllers/checks_controller_test.rb

@@ -1,49 +1,52 @@
-require 'test_helper'
+# frozen_string_literal: true
+
+require "test_helper"
 
 class ChecksControllerTest < ActionDispatch::IntegrationTest
   setup do
+    @principle = principles(:one)
     @check = checks(:deletable)
   end
 
-  test 'should get index' do
+  test "should get index" do
     get checks_url
     assert_response :success
   end
 
-  test 'should get new' do
+  test "should get new" do
     get new_check_url
     assert_response :success
   end
 
-  test 'should create check' do
-    assert_difference('Check.count') do
+  test "should create check" do
+    assert_difference("Check.count") do
       post checks_url,
-           params: { check: { level: @check.level, name: @check.name, position: @check.position,
-                              success_criterion_html: @check.success_criterion_html } }
+           params: { check: { principle_id: @principle.id, level: @check.level, name_de: @check.name_de, position: @check.position,
+                              criterion_de: @check.criterion_de } }
     end
 
     assert_redirected_to check_url(Check.last)
   end
 
-  test 'should show check' do
+  test "should show check" do
     get check_url(@check)
     assert_response :success
   end
 
-  test 'should get edit' do
+  test "should get edit" do
     get edit_check_url(@check)
     assert_response :success
   end
 
-  test 'should update check' do
+  test "should update check" do
     patch check_url(@check),
-          params: { check: { level: @check.level, name: @check.name, position: @check.position,
-                             success_criterion_html: @check.success_criterion_html } }
+          params: { check: { principle_id: @principle.id, level: @check.level, name_de: @check.t_name, position: @check.position,
+                             criterion_de: @check.criterion_de } }
     assert_redirected_to check_url(@check)
   end
 
-  test 'should destroy check' do
-    assert_difference('Check.count', -1) do
+  test "should destroy check" do
+    assert_difference("Check.count", -1) do
       delete check_url(@check)
     end