assert_response :redirect
assert_redirected_to :action => :index, :display_name => public_trace_file.user.display_name
trace = Trace.find(public_trace_file.id)
assert_equal false, trace.visible
assert_response :redirect
assert_redirected_to :action => :index, :display_name => public_trace_file.user.display_name
trace = Trace.find(public_trace_file.id)
assert_equal false, trace.visible