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# *****************************************************************************
#
# 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.
#
# See NOTICE file for details.
#
# *****************************************************************************
import jpype
from jpype import java, JProxy
from jpype.types import *
import common
def throwIOException():
raise java.io.IOException("Test throw")
def throwByJavaException():
JClass('jpype.exc.ExceptionTest').throwIOException()
class ExceptionTestCase(common.JPypeTestCase):
def testExceptionThrown(self):
ext = JClass('jpype.exc.ExceptionTest')
try:
ext.throwRuntime()
self.fail()
except JException as ex:
self.assertIs(type(ex), java.lang.RuntimeException)
self.assertEqual('Foo', ex.message())
trace = ex.stacktrace()
self.assertTrue(str(trace).startswith(
'java.lang.RuntimeException: Foo'))
def testExceptionByJavaClass(self):
ext = JClass('jpype.exc.ExceptionTest')
try:
ext.throwRuntime()
self.fail()
except java.lang.RuntimeException as ex:
self.assertIs(type(ex), java.lang.RuntimeException)
self.assertEqual('Foo', ex.message())
trace = ex.stacktrace()
self.assertTrue(str(trace).startswith(
'java.lang.RuntimeException: Foo'))
def testThrowException(self):
exthrow = JClass('jpype.exc.ExceptionThrower')
extest = JClass('jpype.exc.ExceptionTest')
d = {"throwIOException": throwIOException, }
p = JProxy(exthrow, dict=d)
self.assertTrue(extest.delegateThrow(p))
def testThrowException3(self):
exthrow = JClass('jpype.exc.ExceptionThrower')
extest = JClass('jpype.exc.ExceptionTest')
d = {"throwIOException": throwByJavaException, }
p = JProxy(exthrow, dict=d)
self.assertTrue(extest.delegateThrow(p))
# This test is problematic as __name__ is a class property not an object property
# def testExceptionPYEXCName(self):
# e = self.jpype.exc.ChildTestException()
# name = "jpype.exc.ChildTestException"
# self.assertEqual(name, e.__name__)
def testExceptionInstanceof(self):
e = self.jpype.exc.ChildTestException()
self.assertIsInstance(e, self.jpype.exc.ParentTestException)
def testExceptionPYEXCInstanceof(self):
e = self.jpype.exc.ChildTestException
self.assertTrue(issubclass(e, self.jpype.exc.ParentTestException))
def testThrowChildExceptionFromCatchJExceptionParentClass(self):
try:
self.jpype.exc.ExceptionTest.throwChildTestException()
self.fail()
except self.jpype.exc.ParentTestException as ex:
self.assertIsInstance(ex, self.jpype.exc.ChildTestException)
def testCause(self):
cls = jpype.JClass("jpype.exc.ExceptionTest")
try:
cls.throwChain()
except Exception as ex:
ex1 = ex
self.assertEqual(str(ex1.__cause__), "Java Exception")
frame = ex1.__cause__.__traceback__
expected = [
'jpype.exc.ExceptionTest.throwChain',
'jpype.exc.ExceptionTest.method1',
'jpype.exc.ExceptionTest.method2',
]
i = 0
while (frame):
self.assertEqual(frame.tb_frame.f_code.co_name, expected[i])
frame = frame.tb_next
i += 1
def testIndexError(self):
with self.assertRaises(IndexError):
raise java.lang.IndexOutOfBoundsException("From Java")
def testValueError(self):
js = JObject(None, JString)
with self.assertRaises(ValueError):
js.substring(0)
def testExcCtor(self):
WE = jpype.JClass("jpype.exc.WierdException")
with self.assertRaises(WE):
WE.testThrow()
try:
WE.testThrow()
except Exception as ex:
ex1 = ex
self.assertEqual(ex1.args, ("Got it",))
def testExcCauseChained1(self):
import jpype.imports
try:
from org.jpype.fail import BadInitializer # type: ignore
except Exception as ex:
ex1 = ex
self.assertIsInstance(ex1, ImportError)
self.assertIsInstance(ex1.__cause__, JClass(
"java.lang.ExceptionInInitializerError"))
self.assertIsInstance(ex1.__cause__.__cause__, JClass(
"java.lang.ArrayIndexOutOfBoundsException"))
self.assertTrue(ex1.__cause__.__traceback__ is not None)
self.assertTrue(ex1.__cause__.__cause__.__traceback__ is not None)
def testExcCauseChained2(self):
try:
JClass('org.jpype.fail.BadInitializer2')
except Exception as ex:
ex1 = ex
self.assertIsInstance(ex1, JClass(
'java.lang.ExceptionInInitializerError'))
self.assertIsInstance(ex1.__cause__.__cause__, JClass(
"java.lang.ArrayIndexOutOfBoundsException"))
self.assertTrue(ex1.__cause__.__traceback__ is not None)
self.assertTrue(ex1.__cause__.__cause__.__traceback__ is not None)
def testExpandStacktrace(self):
Th = jpype.JClass('java.lang.Throwable')
null = jpype.JObject(None, Th)
# The next line should not fail
Th._expandStacktrace(null)
def testException(self):
Th = jpype.JClass('java.lang.Throwable')('abc')
self.assertEqual(str(Th), 'java.lang.Throwable: abc')
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