View is a view: <tal:block 
  content="python:hasattr(view,'context') and hasattr(view, 'request')" />
Context is testoid: <tal:block content="python:context.id == 'testoid'" />
Context.__parent__ is test_folder_1_: <tal:block
  content="python:context.__parent__.id =='test_folder_1_'" />
Container is context: <tal:block content="python:container is context" />
Here is context: <tal:block content="python:here is context"/>
Nothing is None: <tal:block content="python:nothing is None"/>
Default works: <tal:block replace="non_existent_var|default" />True
Root is the application: <tal:block
  replace="python:repr(root).find('Application') != -1" />
Template is a template: <tal:block
  replace="python:'ViewPageTemplateFile' in repr(template)" />
Traverse_subpath exists and is empty: <tal:block
  replace="python:traverse_subpath == []" />
Request is a request: <tal:block
  replace="python:getattr(request, 'RESPONSE', None) is not None" />
User is manager: <tal:block replace="python:str(user) == 'manager'" />
Options exist: <tal:block replace="python:options is not None" />
Attrs exist: <tal:block replace="python:attrs is not None" />
Repeat exists: <tal:block replace="python:repeat is not None" />
Loop exists: <tal:block replace="python:loop is not None" />
Modules exists: <tal:block replace="python:modules is not None" />