bf36409e2a
added message attribute compared to the previous version of Exception. It is also a new-style class, making all exceptions now new-style. KeyboardInterrupt and SystemExit inherit from BaseException directly. String exceptions now raise DeprecationWarning. Applies patch 1104669, and closes bugs 1012952 and 518846.
209 lines
4.5 KiB
Python
209 lines
4.5 KiB
Python
# Python test set -- part 5, built-in exceptions
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from test.test_support import TestFailed, TESTFN, unlink
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from types import ClassType
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import warnings
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import sys, traceback, os
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print '5. Built-in exceptions'
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# XXX This is not really enough, each *operation* should be tested!
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# Reloading the built-in exceptions module failed prior to Py2.2, while it
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# should act the same as reloading built-in sys.
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try:
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import exceptions
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reload(exceptions)
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except ImportError, e:
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raise TestFailed, e
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def test_raise_catch(exc):
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try:
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raise exc, "spam"
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except exc, err:
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buf = str(err)
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try:
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raise exc("spam")
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except exc, err:
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buf = str(err)
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print buf
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def r(thing):
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test_raise_catch(thing)
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print getattr(thing, '__name__', thing)
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r(AttributeError)
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import sys
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try: x = sys.undefined_attribute
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except AttributeError: pass
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r(EOFError)
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import sys
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fp = open(TESTFN, 'w')
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fp.close()
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fp = open(TESTFN, 'r')
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savestdin = sys.stdin
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try:
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try:
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sys.stdin = fp
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x = raw_input()
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except EOFError:
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pass
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finally:
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sys.stdin = savestdin
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fp.close()
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r(IOError)
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try: open('this file does not exist', 'r')
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except IOError: pass
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r(ImportError)
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try: import undefined_module
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except ImportError: pass
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r(IndexError)
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x = []
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try: a = x[10]
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except IndexError: pass
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r(KeyError)
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x = {}
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try: a = x['key']
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except KeyError: pass
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r(KeyboardInterrupt)
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print '(not testable in a script)'
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r(MemoryError)
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print '(not safe to test)'
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r(NameError)
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try: x = undefined_variable
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except NameError: pass
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r(OverflowError)
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# XXX
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# Obscure: in 2.2 and 2.3, this test relied on changing OverflowWarning
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# into an error, in order to trigger OverflowError. In 2.4, OverflowWarning
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# should no longer be generated, so the focus of the test shifts to showing
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# that OverflowError *isn't* generated. OverflowWarning should be gone
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# in Python 2.5, and then the filterwarnings() call, and this comment,
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# should go away.
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warnings.filterwarnings("error", "", OverflowWarning, __name__)
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x = 1
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for dummy in range(128):
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x += x # this simply shouldn't blow up
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r(RuntimeError)
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print '(not used any more?)'
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r(SyntaxError)
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try: exec '/\n'
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except SyntaxError: pass
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# make sure the right exception message is raised for each of these
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# code fragments:
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def ckmsg(src, msg):
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try:
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compile(src, '<fragment>', 'exec')
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except SyntaxError, e:
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print e.msg
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if e.msg == msg:
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print "ok"
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else:
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print "expected:", msg
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else:
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print "failed to get expected SyntaxError"
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s = '''\
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while 1:
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try:
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pass
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finally:
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continue
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'''
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if sys.platform.startswith('java'):
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print "'continue' not supported inside 'finally' clause"
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print "ok"
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else:
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ckmsg(s, "'continue' not supported inside 'finally' clause")
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s = '''\
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try:
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continue
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except:
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pass
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'''
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ckmsg(s, "'continue' not properly in loop")
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ckmsg("continue\n", "'continue' not properly in loop")
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r(IndentationError)
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r(TabError)
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# can only be tested under -tt, and is the only test for -tt
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#try: compile("try:\n\t1/0\n \t1/0\nfinally:\n pass\n", '<string>', 'exec')
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#except TabError: pass
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#else: raise TestFailed
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r(SystemError)
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print '(hard to reproduce)'
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r(SystemExit)
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import sys
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try: sys.exit(0)
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except SystemExit: pass
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r(TypeError)
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try: [] + ()
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except TypeError: pass
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r(ValueError)
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try: x = chr(10000)
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except ValueError: pass
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r(ZeroDivisionError)
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try: x = 1/0
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except ZeroDivisionError: pass
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r(Exception)
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try: x = 1/0
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except Exception, e: pass
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# test that setting an exception at the C level works even if the
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# exception object can't be constructed.
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class BadException:
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def __init__(self):
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raise RuntimeError, "can't instantiate BadException"
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def test_capi1():
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import _testcapi
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try:
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_testcapi.raise_exception(BadException, 1)
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except TypeError, err:
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exc, err, tb = sys.exc_info()
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co = tb.tb_frame.f_code
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assert co.co_name == "test_capi1"
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assert co.co_filename.endswith('test_exceptions'+os.extsep+'py')
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else:
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print "Expected exception"
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def test_capi2():
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import _testcapi
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try:
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_testcapi.raise_exception(BadException, 0)
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except RuntimeError, err:
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exc, err, tb = sys.exc_info()
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co = tb.tb_frame.f_code
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assert co.co_name == "__init__"
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assert co.co_filename.endswith('test_exceptions'+os.extsep+'py')
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co2 = tb.tb_frame.f_back.f_code
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assert co2.co_name == "test_capi2"
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else:
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print "Expected exception"
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if not sys.platform.startswith('java'):
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test_capi1()
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test_capi2()
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unlink(TESTFN)
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