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# This file is part of MAUS: http://micewww.pp.rl.ac.uk:8080/projects/maus
#
# MAUS is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# MAUS is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with MAUS. If not, see <http://www.gnu.org/licenses/>.
"""
Test error handler
"""
#pylint: disable=R0904
import StringIO
import sys
import json
import unittest
import ErrorHandler
class ErrorHandlerTestCase(unittest.TestCase):
"""
Test error handler
"""
def test_error_handler(self): #pylint: disable=R0201
"""
Test initialisation of the error handler
"""
error_handler = ErrorHandler.ErrorHandler()
assert(error_handler.error_to_stderr == True)
assert(error_handler.error_to_json == True)
assert(error_handler.on_error == 'none')
def test_errors_to_json(self):
"""Check we send error to json correctly"""
error_handler = ErrorHandler.ErrorHandler()
doc = {}
try:
raise RuntimeError("Test error 1")
except RuntimeError:
doc = error_handler.ErrorsToJson(doc, self)
try:
raise RuntimeError("Test error 2")
except RuntimeError:
doc = error_handler.ErrorsToJson(doc, self)
self.assertEqual(doc["errors"]["ErrorHandlerTestCase"],
"<type 'exceptions.RuntimeError'>: Test error 2"
)
def test_errors_to_user(self): #pylint: disable=R0201
"""Check that we send errors to sys.stderr if required"""
stderr = sys.stderr
test_err = StringIO.StringIO(u'')
sys.stderr = test_err
error_handler = ErrorHandler.ErrorHandler()
try:
raise RuntimeError("Test error 1")
except RuntimeError:
error_handler.ErrorsToUser()
lines = test_err.getvalue().split('\n')
assert(lines[3] == 'RuntimeError: Test error 1')
sys.stderr = stderr
def test_handle_exception_json(self):
"""Check the flag that controls sending errors to json works"""
error_handler = ErrorHandler.ErrorHandler()
error_handler.error_to_json = True
doc = {}
try:
raise RuntimeError("Test error 1")
except RuntimeError:
doc = error_handler.HandleException(doc, self)
self.assertEqual(doc["errors"]["ErrorHandlerTestCase"],
"<type 'exceptions.RuntimeError'>: Test error 1",
)
error_handler.error_to_json = False
try:
raise RuntimeError("Test error 2")
except RuntimeError:
doc = error_handler.HandleException(doc, self)
self.assertEqual(doc["errors"]["ErrorHandlerTestCase"],
"<type 'exceptions.RuntimeError'>: Test error 1",
)
error_handler.error_to_json = True
try:
raise RuntimeError("Test error 3")
except RuntimeError:
doc = error_handler.HandleException(doc, self)
self.assertEqual(doc["errors"]["ErrorHandlerTestCase"],
"<type 'exceptions.RuntimeError'>: Test error 3",
)
def test_handle_exception_user(self):
"""Check the flag that controls sending errors to stderr"""
error_handler = ErrorHandler.ErrorHandler()
doc = {}
error_handler.error_to_stderr = True
stderr = sys.stderr
test_err = StringIO.StringIO(u'')
print test_err.getvalue()
sys.stderr = test_err
try:
raise RuntimeError("Test error 4")
except RuntimeError:
doc = error_handler.HandleException(doc, self)
error_handler.error_to_stderr = False
try:
raise RuntimeError("Test error 4")
except RuntimeError:
doc = error_handler.HandleException(doc, self)
lines = test_err.getvalue().split('\n')
assert(lines[3] == 'RuntimeError: Test error 4')
sys.stderr = stderr
def test_handle_exception_on_error(self):
"""Check that we handle the exception correctly (raise, halt, etc)"""
error_handler = ErrorHandler.ErrorHandler()
doc = {}
error_handler.on_error = 'halt'
try:
raise RuntimeError("Test error 1")
except RuntimeError:
try:
doc = error_handler.HandleException(doc, self)
except SystemExit:
assert(sys.exc_info()[0] == type(SystemExit()))
error_handler.on_error = 'raise'
try:
raise RuntimeError("Test error 1")
except RuntimeError:
try:
doc = error_handler.HandleException(doc, self)
except RuntimeError:
assert(sys.exc_info()[0] == type(RuntimeError()))
error_handler.on_error = 'none'
try:
raise RuntimeError("Test error 1")
except RuntimeError:
doc = error_handler.HandleException(doc, self)
error_handler.on_error = 'BAD_STRING'
try:
raise RuntimeError("Test error 1")
except RuntimeError:
with self.assertRaises(KeyError):
error_handler.HandleException(doc, self)
def test_default_handler(self):
"""
Check default handler calls correctly
"""
ErrorHandler.DefaultHandler().error_to_stderr = False
ErrorHandler.DefaultHandler().error_to_json = True
ErrorHandler.DefaultHandler().on_error = 'none'
doc = {}
try:
raise RuntimeError("Test error 1")
except RuntimeError:
doc = ErrorHandler.HandleException(doc, self)
assert(doc["errors"]["ErrorHandlerTestCase"] ==
"<type 'exceptions.RuntimeError'>: Test error 1"
)
try:
raise RuntimeError("Test error 2")
except RuntimeError:
doc = json.loads(ErrorHandler.HandleCppException(json.dumps(doc),
"some caller", "Test error 3"))
self.assertEqual(doc["errors"]["some caller"],
"<class 'ErrorHandler.CppError'>: Test error 3",
)
def test_cpp_error(self): #pylint: disable = R0201
"""
Test CppError type works okay
"""
my_error = ErrorHandler.CppError("Some message")
assert(my_error.args == ("Some message",))
assert(repr(my_error) == "Some message")
def test_config_to_error_handler(self):
"""
Test error handler setup from configuration
"""
config_test = {'verbose_level':0, 'errors_to_stderr':None,
'errors_to_json':True, 'on_error':'none'}
error_handler = ErrorHandler.ErrorHandler()
error_handler.ConfigurationToErrorHandler(config_test)
self.assertTrue(error_handler.error_to_stderr)
config_test['verbose_level'] = 4
error_handler.ConfigurationToErrorHandler(config_test)
self.assertFalse(error_handler.error_to_stderr)
self.assertTrue(error_handler.error_to_json)
self.assertEqual(error_handler.on_error, 'none')
config_test = {'verbose_level':4, 'errors_to_stderr':True,
'errors_to_json':False, 'on_error':'raise'}
error_handler.ConfigurationToErrorHandler(config_test)
self.assertTrue(error_handler.error_to_stderr)
self.assertFalse(error_handler.error_to_json)
self.assertEqual(error_handler.on_error, 'raise')
if __name__ == '__main__':
unittest.main()
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