||<tablestyle="width: 100%;" colspan=3 style="background: #2a2929; font-weight: bold; color: #f6bc05;">This page offers some details about writing unit tests for the view layer. ||

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= Investigating View errors =

Sometimes the errors reported by ZOPE and TAL are not very comprehensive. An `AttributeNotFound` error can be triggered by a bunch of reasons.

To help investigating this problems you should write unit tests and use pdb for seeing what goes wrong.

Below is an example using iharness:

{{{
make iharness
> from canonical.launchpad.webapp.servers import LaunchpadTestRequest
> from lp.translations.browser.distroseries import DistroSeriesTemplatesView
> # Create a view
> view = DistroSeriesTemplatesView(hoary, LaunchpadTestRequest())
> view.initialize() # trigger the view attributes initialization
> # Now you can access the view attributes in the same way as TAL
> print view.label
}}}


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CategoryTesting