A lot :)

test/models/element_test.rb

@@ -1,10 +1,12 @@
-require 'test_helper'
+# frozen_string_literal: true
+
+require "test_helper"
 
 class ElementTest < ActiveSupport::TestCase
   # test "the truth" do
   #   assert true
   # end
-  test 'level calculation' do
+  test "level calculation" do
     skip
     sc1 = success_criteria(:one)
     sc2 = success_criteria(:two)
@@ -13,12 +15,12 @@ class ElementTest < ActiveSupport::TestCase
     sc5 = success_criteria(:one)
     sc6 = success_criteria(:two)
     element = elements(:one)
-    element.success_criteria = [sc1, sc2, sc3, sc4, sc5, sc6]
-    element.success_criteria.each { _1.passed! }
+    element.success_criteria = [ sc1, sc2, sc3, sc4, sc5, sc6 ]
+    element.success_criteria.each(&:passed!)
     assert element.level == :A
 
     element.success_criteria.each { _1.result = :passed }
 
-    assert element.level == 'A'
+    assert element.level == "A"
   end
 end