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#!/usr/bin/env python

# -*- coding: utf-8 -*-

from runner.koan import *

class AboutExceptions(Koan):

class MySpecialError(RuntimeError):

pass

def test_exceptions_inherit_from_exception(self):

mro = self.MySpecialError.__mro__

self.assertEqual(__, mro[1].__name__)

self.assertEqual(__, mro[2].__name__)

self.assertEqual(__, mro[3].__name__)

self.assertEqual(__, mro[4].__name__)

def test_try_clause(self):

result = None

try:

self.fail("Oops")

except StandardError as ex:

result = 'exception handled'

self.assertEqual(__, result)

self.assertEqual(____, isinstance(ex, StandardError))

self.assertEqual(____, isinstance(ex, RuntimeError))

self.assertTrue(issubclass(RuntimeError, StandardError), \

"RuntimeError is a subclass of StandardError")

self.assertEqual(__, ex[0])

def test_raising_a_specific_error(self):

result = None

try:

raise self.MySpecialError, "My Message"

except self.MySpecialError as ex:

result = 'exception handled'

self.assertEqual(__, result)

self.assertEqual(__, ex[0])

def test_else_clause(self):

result = None

try:

pass

except RuntimeError:

result = 'it broke'

pass

else:

result = 'no damage done'

self.assertEqual(__, result)

def test_finally_clause(self):

result = None

try:

self.fail("Oops")

except:

# no code here

pass

finally:

result = 'always run'

self.assertEqual(__, result)