Well, I tried to write test like this.

1. Check if xml.parsers.expat.error is raised.
2. Compare *code* attribute of error object with
xml.parsers.expat.errors.XML_ERROR_FINISHED

But I noticed XML_ERROR_FINISHED is not integer but string. (!)

According to
http://docs.python.org/library/pyexpat.html#expaterror-objects

> ExpatError.code
>
>    Expat’s internal error number for the specific error. This will
>    match one of the constants defined in the errors object from
>    this module.

Is this document bug or implementation bug? Personally, I think string
'parsing finished' as error constant might be useless...