add minimum system and model test coverage

test/models/semester_process_volunteer_actions_test.rb

+require 'test_helper'
+
+class SemesterProcessVolunteerTest < ActiveSupport::TestCase
+  def setup
+    @volunteer = create(:volunteer_with_user)
+    @assignment = create(:assignment, volunteer: @volunteer)
+    @group_assignment = create(:group_assignment, volunteer: @volunteer)
+    @subject = create(:semester_process_volunteer, volunteer: @volunteer)
+  end
+
+  test 'set responsible also sets responsibility taken at' do
+    @subject.update(responsible: create(:user))
+    assert @subject.responsibility_taken_at.present?
+  end
+end

test/system/semester_process_volunteer_actions_test.rb

+require 'application_system_test_case'
+
+class SemesterProcessVolunteerActionsTest < ApplicationSystemTestCase
+  setup do
+    @superadmin = create :user
+    @volunteer = create :volunteer_with_user
+    @assignment = create :assignment, volunteer: @volunteer
+    @group_assignment = create :group_assignment, volunteer: @volunteer
+
+    @semester_process = create :semester_process
+    @spv1 = create(:semester_process_volunteer, :with_mission, volunteer: @volunteer,
+      semester_process: @semester_process)
+
+    login_as @superadmin
+  end
+
+  test 'take responsibility for semester process volunteer works' do
+    visit semester_process_volunteers_path
+    within 'tbody' do
+      page.find("[data-url$=\"#{take_responsibility_semester_process_volunteer_path(@spv1)}\"]").click
+    end
+    wait_for_ajax
+    @spv1.reload
+    assert page.has_text? "Übernommen durch #{@superadmin.email}"\
+    " am #{I18n.l(@spv1.responsibility_taken_at.to_date)}"
+  end
+end

test/test_helper.rb

@@ -25,7 +25,8 @@ class ActiveSupport::TestCase
       Feedback, TrialFeedback, Hour, Journal, BillingExpense, Certificate, Import,
       AssignmentLog, Assignment, GroupAssignmentLog, GroupAssignment, GroupOffer,
       ClientNotification, LanguageSkill, Relative, Event, EventVolunteer,
-      Volunteer, Client, User, Contact, Department
+      Volunteer, Client, User, Contact, Department, SemesterProcess, SemesterFeedback,
+      SemesterProcessVolunteer, SemesterProcessVolunteerMission
     )
 
     super