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- """
- This plugin provides assert introspection. When the plugin is enabled
- and a test failure occurs, the traceback is displayed with extra context
- around the line in which the exception was raised. Simple variable
- substitution is also performed in the context output to provide more
- debugging information.
- """
-
- from nose.plugins import Plugin
- from nose.pyversion import exc_to_unicode, force_unicode
- from nose.inspector import inspect_traceback
- class FailureDetail(Plugin):
- """
- Plugin that provides extra information in tracebacks of test failures.
- """
- score = 1600 # before capture
-
- def options(self, parser, env):
- """Register commmandline options.
- """
- parser.add_option(
- "-d", "--detailed-errors", "--failure-detail",
- action="store_true",
- default=env.get('NOSE_DETAILED_ERRORS'),
- dest="detailedErrors", help="Add detail to error"
- " output by attempting to evaluate failed"
- " asserts [NOSE_DETAILED_ERRORS]")
- def configure(self, options, conf):
- """Configure plugin.
- """
- if not self.can_configure:
- return
- self.enabled = options.detailedErrors
- self.conf = conf
- def formatFailure(self, test, err):
- """Add detail from traceback inspection to error message of a failure.
- """
- ec, ev, tb = err
- tbinfo, str_ev = None, exc_to_unicode(ev)
- if tb:
- tbinfo = force_unicode(inspect_traceback(tb))
- str_ev = '\n'.join([str_ev, tbinfo])
- test.tbinfo = tbinfo
- return (ec, str_ev, tb)
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