Running these tests in sequence causes failures in the integration test:

1. test/controllers/smart_proxies_controller_test.rb
2. test/helpers/pagelets_helper_test.rb
3. test/integration/smart_proxy_test.rb

  1) Error:
SmartProxyIntegrationTest#test_0003_edit page:
ActionView::Template::Error: Missing partial smart_proxies/_test, application/_test with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :rabl]}. Searched in:
  * "/home/dcleal/code/foreman/foreman/app/views" 
  * "/home/dcleal/.rvm/gems/ruby-2.3.0@foreman/gems/foreman-tasks-0.8.6/app/views" 
  * "/home/dcleal/.rvm/gems/ruby-2.3.0@foreman/gems/apipie-rails-0.3.7/app/views" 

    app/helpers/pagelets_helper.rb:43:in `render_pagelet'
    app/helpers/pagelets_helper.rb:26:in `block in render_tab_content_for'
    app/helpers/pagelets_helper.rb:23:in `each'
    app/helpers/pagelets_helper.rb:23:in `render_tab_content_for'
    app/views/smart_proxies/show.html.erb:116:in `_app_views_smart_proxies_show_html_erb___2994894796435701335_115606720'
    app/controllers/concerns/application_shared.rb:14:in `set_timezone'
    app/models/concerns/foreman/thread_session.rb:32:in `clear_thread'
    lib/middleware/catch_json_parse_errors.rb:8:in `call'
    lib/middleware/tagged_logging.rb:18:in `call'
    test/integration/smart_proxy_test.rb:25:in `block in <class:SmartProxyIntegrationTest>'

(plus a few other tests in the same integration test case)

The attempt to save/restore state in PageletsHelperTest is insufficient, as it uses Hash#clone to take a copy of Pagelet::Manager's @pagelets variable. This creates a copy of the top-level hash, but the inner hash references remain the same.

When PageletsHelperTest adds to the "smart_proxies/show" inner hash to register a test pagelet, the pagelet stays registered even after the original state is restored as both the original @pagelets hash and restored @pagelets hash refer to the same inner "smart_proxies/show" hash which was modified. The inner hash isn't saved/restored.