File: closeable.py

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#*****************************************************************************
#   Copyright 2017 Karl Einar Nelson
#
#   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.
#
#*****************************************************************************
try:
    import unittest2 as unittest
except ImportError:
    import unittest
import jpype
from . import common
import sys

def pythonNewerThan(major, minor):
    return sys.version_info[0]> major or (sys.version_info[0] == major and sys.version_info[1]>minor)

class CloseableTestCase(common.JPypeTestCase):

    def setUp(self):
        common.JPypeTestCase.setUp(self)

    def testCloseable(self):
        CloseableTest = jpype.JClass("jpype.closeable.CloseableTest")
        CloseableTest.reset()
        self.assertFalse(CloseableTest.closed)
        with CloseableTest() as myFile:
            myFile.print_("hello 1")
        self.assertEqual(CloseableTest.printed, "hello 1")
        self.assertTrue(CloseableTest.closed)

    @unittest.skipUnless(pythonNewerThan(3, 0), "requires python 3")
    def testCloseableFail(self):
        CloseableTest = jpype.JClass("jpype.closeable.CloseableTest")
        CloseableTest.reset()
        CloseableTest.willfail = True
        self.assertFalse(CloseableTest.closed)
        ex1=None
        try:
            with CloseableTest() as myFile:
                myFile.print_("hello 1")
                try:
                    raise Exception('foo')
                except Exception as ex:
                    pass
        except Exception as ex:
            ex1=ex
        self.assertTrue(ex1)
        self.assertEqual(CloseableTest.printed, "hello 1")
        self.assertTrue(CloseableTest.closed)


    def testCloseablePyExcept(self):
        CloseableTest = jpype.JClass("jpype.closeable.CloseableTest")
        CloseableTest.reset()
        self.assertFalse(CloseableTest.closed)
        try:
            with CloseableTest() as myFile:
                myFile.print_("hello 2")
                raise TypeError("Python exception")
                myFile.print_("there")
        except Exception as ex:
            self.assertIsInstance(ex, TypeError)
        self.assertEqual(CloseableTest.printed, "hello 2")
        self.assertTrue(CloseableTest.closed)

    @unittest.skipUnless(pythonNewerThan(2,6), "Earlier python does not support stacked exceptions.")
    def testCloseablePyExceptFail(self):
        CloseableTest = jpype.JClass("jpype.closeable.CloseableTest")
        CloseableTest.reset()
        CloseableTest.willfail=True
        self.assertFalse(CloseableTest.closed)
        try:
            with CloseableTest() as myFile:
                myFile.print_("hello 3")
                raise TypeError("Python exception")
                myFile.print_("there")
        except TypeError as ex:
            self.assertIsInstance(ex, TypeError)
        self.assertEqual(CloseableTest.printed, "hello 3")
        self.assertTrue(CloseableTest.closed)
        self.assertTrue(CloseableTest.failed)

    def testCloseableJExcept(self):
        CloseableTest = jpype.JClass("jpype.closeable.CloseableTest")
        CloseableTest.reset()
        self.assertFalse(CloseableTest.closed)
        try:
            with CloseableTest() as myFile:
                myFile.print_("hello 4")
                myFile.throwException()
                myFile.print_("there")
        except Exception as ex:
            self.assertIsInstance(ex, jpype.JavaException, 'type is %s'%type(ex))
            self.assertEqual(ex.args[0].getMessage(), 'oh no!')
        self.assertEqual(CloseableTest.printed, "hello 4")
        self.assertTrue(CloseableTest.closed)

    @unittest.skipUnless(pythonNewerThan(2,6), "Earlier python does not support stacked exceptions.")
    def testCloseableJExceptFail(self):
        CloseableTest = jpype.JClass("jpype.closeable.CloseableTest")
        CloseableTest.reset()
        CloseableTest.willfail = True
        self.assertFalse(CloseableTest.closed)
        try:
            with CloseableTest() as myFile:
                myFile.print_("hello 5")
                myFile.throwException()
                myFile.print_("there")
        except Exception as ex:
            self.assertIsInstance(ex, jpype.JavaException, 'type is %s'%type(ex))
            self.assertEqual(ex.args[0].getMessage(), 'oh no!') # fail if get "oh my?"
        self.assertEqual(CloseableTest.printed, "hello 5")
        self.assertTrue(CloseableTest.closed)
        self.assertTrue(CloseableTest.failed)