remove running timer info when the time entry is removed

test/unit/time_entry_test.rb

@@ -0,0 +1,24 @@
+require_relative '../test_helper'
+
+class StartTimerTest < ActiveSupport::TestCase
+  fixtures :users, :user_preferences, :time_entries, :projects,
+    :roles, :member_roles, :members, :enumerations, :enabled_modules
+
+  setup do
+    @user = User.find 1
+    @time_entry = TimeEntry.where(user_id: 1).first
+    # so we dont have to load all the issue and related fixtures:
+    @time_entry.update_column :issue_id, nil
+  end
+
+  test "should stop timer before destroy" do
+    assert r = Stopwatch::StartTimer.new(@time_entry, user: @user).call
+    assert r.success?, r.inspect
+    assert User.find(@user.id).timer_running?
+
+    @time_entry.destroy
+
+    refute User.find(@user.id).timer_running?
+  end
+
+end