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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ# Copyright 2007 Google, Inc. All Rights Reserved. # Licensed to PSF under a Contributor Agreement. """Tests for the raise statement.""" from test import support import sys import types import unittest def get_tb(): try: raise OSError() except OSError as e: return e.__traceback__ class Context: def __enter__(self): return self def __exit__(self, exc_type, exc_value, exc_tb): return True class TestRaise(unittest.TestCase): def test_invalid_reraise(self): try: raise except RuntimeError as e: self.assertIn("No active exception", str(e)) else: self.fail("No exception raised") def test_reraise(self): try: try: raise IndexError() except IndexError as e: exc1 = e raise except IndexError as exc2: self.assertIs(exc1, exc2) else: self.fail("No exception raised") def test_except_reraise(self): def reraise(): try: raise TypeError("foo") except: try: raise KeyError("caught") except KeyError: pass raise self.assertRaises(TypeError, reraise) def test_finally_reraise(self): def reraise(): try: raise TypeError("foo") except: try: raise KeyError("caught") finally: raise self.assertRaises(KeyError, reraise) def test_nested_reraise(self): def nested_reraise(): raise def reraise(): try: raise TypeError("foo") except: nested_reraise() self.assertRaises(TypeError, reraise) def test_raise_from_None(self): try: try: raise TypeError("foo") except: raise ValueError() from None except ValueError as e: self.assertIsInstance(e.__context__, TypeError) self.assertIsNone(e.__cause__) def test_with_reraise1(self): def reraise(): try: raise TypeError("foo") except: with Context(): pass raise self.assertRaises(TypeError, reraise) def test_with_reraise2(self): def reraise(): try: raise TypeError("foo") except: with Context(): raise KeyError("caught") raise self.assertRaises(TypeError, reraise) def test_yield_reraise(self): def reraise(): try: raise TypeError("foo") except: yield 1 raise g = reraise() next(g) self.assertRaises(TypeError, lambda: next(g)) self.assertRaises(StopIteration, lambda: next(g)) def test_erroneous_exception(self): class MyException(Exception): def __init__(self): raise RuntimeError() try: raise MyException except RuntimeError: pass else: self.fail("No exception raised") def test_new_returns_invalid_instance(self): # See issue #11627. class MyException(Exception): def __new__(cls, *args): return object() with self.assertRaises(TypeError): raise MyException def test_assert_with_tuple_arg(self): try: assert False, (3,) except AssertionError as e: self.assertEqual(str(e), "(3,)") class TestCause(unittest.TestCase): def testCauseSyntax(self): try: try: try: raise TypeError except Exception: raise ValueError from None except ValueError as exc: self.assertIsNone(exc.__cause__) self.assertTrue(exc.__suppress_context__) exc.__suppress_context__ = False raise exc except ValueError as exc: e = exc self.assertIsNone(e.__cause__) self.assertFalse(e.__suppress_context__) self.assertIsInstance(e.__context__, TypeError) def test_invalid_cause(self): try: raise IndexError from 5 except TypeError as e: self.assertIn("exception cause", str(e)) else: self.fail("No exception raised") def test_class_cause(self): try: raise IndexError from KeyError except IndexError as e: self.assertIsInstance(e.__cause__, KeyError) else: self.fail("No exception raised") def test_instance_cause(self): cause = KeyError() try: raise IndexError from cause except IndexError as e: self.assertIs(e.__cause__, cause) else: self.fail("No exception raised") def test_erroneous_cause(self): class MyException(Exception): def __init__(self): raise RuntimeError() try: raise IndexError from MyException except RuntimeError: pass else: self.fail("No exception raised") class TestTraceback(unittest.TestCase): def test_sets_traceback(self): try: raise IndexError() except IndexError as e: self.assertIsInstance(e.__traceback__, types.TracebackType) else: self.fail("No exception raised") def test_accepts_traceback(self): tb = get_tb() try: raise IndexError().with_traceback(tb) except IndexError as e: self.assertNotEqual(e.__traceback__, tb) self.assertEqual(e.__traceback__.tb_next, tb) else: self.fail("No exception raised") class TestTracebackType(unittest.TestCase): def raiser(self): raise ValueError def test_attrs(self): try: self.raiser() except Exception as exc: tb = exc.__traceback__ self.assertIsInstance(tb.tb_next, types.TracebackType) self.assertIs(tb.tb_frame, sys._getframe()) self.assertIsInstance(tb.tb_lasti, int) self.assertIsInstance(tb.tb_lineno, int) self.assertIs(tb.tb_next.tb_next, None) # Invalid assignments with self.assertRaises(TypeError): del tb.tb_next with self.assertRaises(TypeError): tb.tb_next = "asdf" # Loops with self.assertRaises(ValueError): tb.tb_next = tb with self.assertRaises(ValueError): tb.tb_next.tb_next = tb # Valid assignments tb.tb_next = None self.assertIs(tb.tb_next, None) new_tb = get_tb() tb.tb_next = new_tb self.assertIs(tb.tb_next, new_tb) def test_constructor(self): other_tb = get_tb() frame = sys._getframe() tb = types.TracebackType(other_tb, frame, 1, 2) self.assertEqual(tb.tb_next, other_tb) self.assertEqual(tb.tb_frame, frame) self.assertEqual(tb.tb_lasti, 1) self.assertEqual(tb.tb_lineno, 2) tb = types.TracebackType(None, frame, 1, 2) self.assertEqual(tb.tb_next, None) with self.assertRaises(TypeError): types.TracebackType("no", frame, 1, 2) with self.assertRaises(TypeError): types.TracebackType(other_tb, "no", 1, 2) with self.assertRaises(TypeError): types.TracebackType(other_tb, frame, "no", 2) with self.assertRaises(TypeError): types.TracebackType(other_tb, frame, 1, "nuh-uh") class TestContext(unittest.TestCase): def test_instance_context_instance_raise(self): context = IndexError() try: try: raise context except: raise OSError() except OSError as e: self.assertIs(e.__context__, context) else: self.fail("No exception raised") def test_class_context_instance_raise(self): context = IndexError try: try: raise context except: raise OSError() except OSError as e: self.assertIsNot(e.__context__, context) self.assertIsInstance(e.__context__, context) else: self.fail("No exception raised") def test_class_context_class_raise(self): context = IndexError try: try: raise context except: raise OSError except OSError as e: self.assertIsNot(e.__context__, context) self.assertIsInstance(e.__context__, context) else: self.fail("No exception raised") def test_c_exception_context(self): try: try: 1/0 except: raise OSError except OSError as e: self.assertIsInstance(e.__context__, ZeroDivisionError) else: self.fail("No exception raised") def test_c_exception_raise(self): try: try: 1/0 except: xyzzy except NameError as e: self.assertIsInstance(e.__context__, ZeroDivisionError) else: self.fail("No exception raised") def test_noraise_finally(self): try: try: pass finally: raise OSError except OSError as e: self.assertIsNone(e.__context__) else: self.fail("No exception raised") def test_raise_finally(self): try: try: 1/0 finally: raise OSError except OSError as e: self.assertIsInstance(e.__context__, ZeroDivisionError) else: self.fail("No exception raised") def test_context_manager(self): class ContextManager: def __enter__(self): pass def __exit__(self, t, v, tb): xyzzy try: with ContextManager(): 1/0 except NameError as e: self.assertIsInstance(e.__context__, ZeroDivisionError) else: self.fail("No exception raised") def test_cycle_broken(self): # Self-cycles (when re-raising a caught exception) are broken try: try: 1/0 except ZeroDivisionError as e: raise e except ZeroDivisionError as e: self.assertIsNone(e.__context__) def test_reraise_cycle_broken(self): # Non-trivial context cycles (through re-raising a previous exception) # are broken too. try: try: xyzzy except NameError as a: try: 1/0 except ZeroDivisionError: raise a except NameError as e: self.assertIsNone(e.__context__.__context__) def test_not_last(self): # Context is not necessarily the last exception context = Exception("context") try: raise context except Exception: try: raise Exception("caught") except Exception: pass try: raise Exception("new") except Exception as exc: raised = exc self.assertIs(raised.__context__, context) def test_3118(self): # deleting the generator caused the __context__ to be cleared def gen(): try: yield 1 finally: pass def f(): g = gen() next(g) try: try: raise ValueError except: del g raise KeyError except Exception as e: self.assertIsInstance(e.__context__, ValueError) f() def test_3611(self): import gc # A re-raised exception in a __del__ caused the __context__ # to be cleared class C: def __del__(self): try: 1/0 except: raise def f(): x = C() try: try: f.x except AttributeError: # make x.__del__ trigger del x gc.collect() # For PyPy or other GCs. raise TypeError except Exception as e: self.assertNotEqual(e.__context__, None) self.assertIsInstance(e.__context__, AttributeError) with support.catch_unraisable_exception() as cm: f() self.assertEqual(ZeroDivisionError, cm.unraisable.exc_type) class TestRemovedFunctionality(unittest.TestCase): def test_tuples(self): try: raise (IndexError, KeyError) # This should be a tuple! except TypeError: pass else: self.fail("No exception raised") def test_strings(self): try: raise "foo" except TypeError: pass else: self.fail("No exception raised") if __name__ == "__main__": unittest.main()