Hiding stacktraces for expected exceptions

For common expected failures where you do not want to see the whole stacktrace, apply the “@no_stacktrace_for” decorator.

example.story:

Failing story:
  steps:
    - Failing step without stacktrace

engine.py:

from hitchstory import BaseEngine, no_stacktrace_for, Failure
from code_that_does_things import raise_example_exception, output, ExampleException

class Engine(BaseEngine):
    def passing_step(self):
        pass

    def failing_step(self):
        raise_example_exception("Towel not located")

    @no_stacktrace_for(ExampleException)
    def failing_step_without_stacktrace(self):
        raise_example_exception("Expected exception")

    def raise_special_failure_exception(self):
        raise Failure("Special failure exception - no stacktrace printed!")

    def step_that_will_not_run(self):
        pass
        
    def on_failure(self, result):
        pass

    def not_executed_step(self):
        pass
from hitchstory import StoryCollection
from engine import Engine
from pathquery import pathquery

story_collection = StoryCollection(pathquery(".").ext("story"), Engine())
story_collection.one().play()

Will output:

RUNNING Failing story in /path/to/example.story ... FAILED in 0.1 seconds.

    Failing story:
      steps:
      - Failing step without stacktrace


code_that_does_things.ExampleException

    This is a demonstration exception docstring.

    It spreads across multiple lines.

Expected exception

Executable specification

Page automatically generated from expected-exceptions.story.