164 lines
4.1 KiB
Python
164 lines
4.1 KiB
Python
# Copyright 2007 Google, Inc. All Rights Reserved.
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# Licensed to PSF under a Contributor Agreement.
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"""Tests for the raise statement."""
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from test import support
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import sys
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import types
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import unittest
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def get_tb():
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try:
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raise OSError()
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except:
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return sys.exc_info()[2]
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class TestRaise(unittest.TestCase):
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def test_invalid_reraise(self):
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try:
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raise
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except RuntimeError as e:
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self.failUnless("No active exception" in str(e))
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else:
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self.fail("No exception raised")
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def test_reraise(self):
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try:
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try:
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raise IndexError()
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except IndexError as e:
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exc1 = e
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raise
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except IndexError as exc2:
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self.failUnless(exc1 is exc2)
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else:
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self.fail("No exception raised")
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def test_erroneous_exception(self):
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class MyException(Exception):
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def __init__(self):
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raise RuntimeError()
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try:
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raise MyException
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except RuntimeError:
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pass
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else:
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self.fail("No exception raised")
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class TestCause(unittest.TestCase):
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def test_invalid_cause(self):
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try:
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raise IndexError from 5
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except TypeError as e:
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self.failUnless("exception cause" in str(e))
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else:
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self.fail("No exception raised")
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def test_class_cause(self):
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try:
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raise IndexError from KeyError
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except IndexError as e:
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self.failUnless(isinstance(e.__cause__, KeyError))
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else:
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self.fail("No exception raised")
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def test_instance_cause(self):
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cause = KeyError()
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try:
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raise IndexError from cause
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except IndexError as e:
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self.failUnless(e.__cause__ is cause)
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else:
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self.fail("No exception raised")
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def test_erroneous_cause(self):
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class MyException(Exception):
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def __init__(self):
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raise RuntimeError()
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try:
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raise IndexError from MyException
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except RuntimeError:
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pass
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else:
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self.fail("No exception raised")
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class TestTraceback(unittest.TestCase):
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def test_sets_traceback(self):
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try:
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raise IndexError()
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except IndexError as e:
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self.failUnless(isinstance(e.__traceback__, types.TracebackType))
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else:
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self.fail("No exception raised")
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def test_accepts_traceback(self):
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tb = get_tb()
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try:
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raise IndexError().with_traceback(tb)
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except IndexError as e:
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self.assertNotEqual(e.__traceback__, tb)
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self.assertEqual(e.__traceback__.tb_next, tb)
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else:
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self.fail("No exception raised")
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# Disabled until context is implemented
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# class TestContext(object):
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# def test_instance_context_bare_raise(self):
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# context = IndexError()
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# try:
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# try:
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# raise context
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# except:
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# raise OSError()
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# except OSError as e:
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# self.assertEqual(e.__context__, context)
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# else:
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# self.fail("No exception raised")
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#
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# def test_class_context_bare_raise(self):
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# context = IndexError
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# try:
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# try:
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# raise context
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# except:
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# raise OSError()
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# except OSError as e:
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# self.assertNotEqual(e.__context__, context)
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# self.failUnless(isinstance(e.__context__, context))
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# else:
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# self.fail("No exception raised")
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class TestRemovedFunctionality(unittest.TestCase):
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def test_tuples(self):
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try:
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raise (IndexError, KeyError) # This should be a tuple!
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except TypeError:
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pass
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else:
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self.fail("No exception raised")
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def test_strings(self):
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try:
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raise "foo"
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except TypeError:
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pass
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else:
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self.fail("No exception raised")
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def test_main():
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support.run_unittest(__name__)
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if __name__ == "__main__":
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unittest.main()
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