Fix tests for async activity creation - wrap defer calls in perform_enqueued_jobs and update mocks

Co-authored-by: iHiD <286476+iHiD@users.noreply.github.com>

Author: Copilot

test/commands/solution/complete_test.rb

@@ -52,7 +52,9 @@ class Solution::CompleteTest < ActiveSupport::TestCase
     solution = create(:practice_solution, user:, exercise:)
     create(:iteration, solution:)
 
-    Solution::Complete.(solution, user_track)
+    perform_enqueued_jobs do
+      Solution::Complete.(solution, user_track)
+    end
 
     activity = User::Activities::CompletedExerciseActivity.last
     assert_equal user, activity.user
@@ -73,7 +75,9 @@ class Solution::CompleteTest < ActiveSupport::TestCase
       # Sanity check
       assert solution.completed?
 
-      Solution::Complete.(solution, user_track)
+      perform_enqueued_jobs do
+        Solution::Complete.(solution, user_track)
+      end
 
       solution.reload
       assert solution.completed?

test/commands/solution/publish_iteration_test.rb

@@ -68,7 +68,7 @@ class Solution::PublishIterationTest < ActiveSupport::TestCase
     solution = create(:concept_solution)
     create(:iteration, submission: create(:submission, solution:))
 
-    Solution::UpdatePublishedExerciseRepresentation.expects(:call).with(solution)
+    Solution::UpdatePublishedExerciseRepresentation.expects(:defer).with(solution)
 
     Solution::Publish.(solution, user_track, nil)
   end
@@ -83,7 +83,7 @@ class Solution::PublishIterationTest < ActiveSupport::TestCase
     solution = create(:concept_solution)
     create(:iteration, submission: create(:submission, solution:))
 
-    Solution::UpdateTags.expects(:call).with(solution)
+    Solution::UpdateTags.expects(:defer).with(solution)
 
     Solution::Publish.(solution, user_track, nil)
   end

test/commands/solution/publish_test.rb

@@ -100,7 +100,9 @@ class Solution::PublishTest < ActiveSupport::TestCase
     solution = create(:practice_solution, user:, exercise:)
     iteration = create(:iteration, solution:)
 
-    Solution::Publish.(solution, solution.user_track, iteration.idx)
+    perform_enqueued_jobs do
+      Solution::Publish.(solution, solution.user_track, iteration.idx)
+    end
 
     activity = User::Activities::PublishedExerciseActivity.last
     assert_equal user, activity.user