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# -*- coding: utf-8 -*-
# Copyright (C) 2013 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import string
from taskflow import exceptions as exc
from taskflow import test
class TestExceptions(test.TestCase):
def test_cause(self):
capture = None
try:
raise exc.TaskFlowException("broken", cause=IOError("dead"))
except Exception as e:
capture = e
self.assertIsNotNone(capture)
self.assertIsInstance(capture, exc.TaskFlowException)
self.assertIsNotNone(capture.cause)
self.assertIsInstance(capture.cause, IOError)
def test_cause_pformat(self):
capture = None
try:
raise exc.TaskFlowException("broken", cause=IOError("dead"))
except Exception as e:
capture = e
self.assertIsNotNone(capture)
self.assertGreater(0, len(capture.pformat()))
def test_raise_with(self):
capture = None
try:
raise IOError('broken')
except Exception:
try:
exc.raise_with_cause(exc.TaskFlowException, 'broken')
except Exception as e:
capture = e
self.assertIsNotNone(capture)
self.assertIsInstance(capture, exc.TaskFlowException)
self.assertIsNotNone(capture.cause)
self.assertIsInstance(capture.cause, IOError)
def test_no_looping(self):
causes = []
for a in string.ascii_lowercase:
try:
cause = causes[-1]
except IndexError:
cause = None
causes.append(exc.TaskFlowException('%s broken' % a, cause=cause))
e = causes[0]
last_e = causes[-1]
e._cause = last_e
self.assertIsNotNone(e.pformat())
def test_pformat_str(self):
ex = None
try:
try:
try:
raise IOError("Didn't work")
except IOError:
exc.raise_with_cause(exc.TaskFlowException,
"It didn't go so well")
except exc.TaskFlowException:
exc.raise_with_cause(exc.TaskFlowException, "I Failed")
except exc.TaskFlowException as e:
ex = e
self.assertIsNotNone(ex)
self.assertIsInstance(ex, exc.TaskFlowException)
self.assertIsInstance(ex.cause, exc.TaskFlowException)
self.assertIsInstance(ex.cause.cause, IOError)
p_msg = ex.pformat()
p_str_msg = str(ex)
for msg in ["I Failed", "It didn't go so well", "Didn't work"]:
self.assertIn(msg, p_msg)
self.assertIn(msg, p_str_msg)
def test_pformat_root_class(self):
ex = exc.TaskFlowException("Broken")
self.assertIn("TaskFlowException",
ex.pformat(show_root_class=True))
self.assertNotIn("TaskFlowException",
ex.pformat(show_root_class=False))
self.assertIn("Broken",
ex.pformat(show_root_class=True))
def test_invalid_pformat_indent(self):
ex = exc.TaskFlowException("Broken")
self.assertRaises(ValueError, ex.pformat, indent=-100)
def test_raise_with_cause(self):
capture = None
try:
raise IOError('broken')
except Exception:
try:
exc.raise_with_cause(exc.TaskFlowException, 'broken')
except Exception as e:
capture = e
self.assertIsNotNone(capture)
self.assertIsInstance(capture, exc.TaskFlowException)
self.assertIsNotNone(capture.cause)
self.assertIsInstance(capture.cause, IOError)
self.assertIsNotNone(capture.__cause__)
self.assertIsInstance(capture.__cause__, IOError)
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