Restore TimeEntry patch with test

init.rb

@@ -18,4 +18,7 @@
          { controller: 't2r_import', action: 'index' },
          caption: 'Toggl'
   end
+
+  # Patches.
+  require_relative 'lib/patches/time_entry'
 end

test/integration/models/toggl_mapping_test.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: false
+
+require_relative '../../test_helper'
+
+class TogglMappingTest < T2r::IntegrationTest
+  fixtures :all
+
+  def setup
+    @user = users(:jsmith)
+  end
+
+  test 'deleting time entry deletes relevant toggl mappings' do
+    time_entry = time_entries(:entry_001)
+
+    mapping_1 = TogglMapping.create(
+      toggl_id: 201,
+      time_entry_id: time_entry.id,
+      created_at: DateTime.strptime('2024-02-22T15:30:04+00:00')
+    )
+    mapping_2 = TogglMapping.create(
+      toggl_id: 202,
+      time_entry_id: time_entry.id,
+      created_at: DateTime.strptime('2024-02-22T15:30:04+00:00')
+    )
+
+    assert time_entry.toggl_mapping_ids.include? mapping_1.id
+    assert time_entry.toggl_mapping_ids.include? mapping_2.id
+
+    assert time_entry.destroy
+
+    refute TogglMapping.exists? mapping_1.id
+    refute TogglMapping.exists? mapping_2.id
+  end
+end