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checker_interface_test.py
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checker_interface_test.py
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# -*- coding:utf-8; python-indent:2; indent-tabs-mode:nil -*-
# Copyright 2013 Google 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 unittest
from pytypedecl import checker
from pytypedecl import pytd
from tests import interface
class TestCheckerInterface(unittest.TestCase):
def testSimpleInterfaceAsArg(self):
"""Function expecting a type matching an Interface."""
self.assertEquals("Hello", interface.ReadStuff(interface.FakeReadable()))
with self.assertRaises(checker.CheckTypeAnnotationError) as context:
interface.ReadStuff(interface.FakeOpenable())
expected_p = checker.ParamTypeErrorMsg(
"ReadStuff",
"r",
interface.FakeOpenable,
pytd.StructType([pytd.MinimalFunction("Open"),
pytd.MinimalFunction("Read"),
pytd.MinimalFunction("Close")]))
expected_e = checker.ExceptionTypeErrorMsg("ReadStuff",
AttributeError,
())
[actual_p, actual_e] = context.exception.args[0]
self.assertEquals(expected_p, actual_p)
self.assertEquals(expected_e, actual_e)
# TODO: reinstate this test, probably with Interface
def testReturnInterface(self):
"""Function returning an object matching an Interface.
"""
with self.assertRaises(checker.CheckTypeAnnotationError) as context:
interface.GetWritable()
expected_r = checker.ReturnTypeErrorMsg(
"GetWritable",
interface.NoGoodWritable,
pytd.StructType([pytd.MinimalFunction("Open"),
pytd.MinimalFunction("Write"),
pytd.MinimalFunction("Close")]))
[actual_r] = context.exception.args[0]
self.assertEquals(expected_r, actual_r)
if __name__ == "__main__":
unittest.main()