| Collin Winter | 828f04a | 2007-08-31 00:04:24 +0000 | [diff] [blame] | 1 | # Copyright 2007 Google, Inc. All Rights Reserved. |
| 2 | # Licensed to PSF under a Contributor Agreement. |
| 3 | |
| 4 | """Tests for the raise statement.""" |
| 5 | |
| 6 | from test import test_support |
| 7 | import sys |
| 8 | import types |
| 9 | import unittest |
| 10 | |
| 11 | |
| 12 | def get_tb(): |
| 13 | try: |
| 14 | raise OSError() |
| 15 | except: |
| 16 | return sys.exc_info()[2] |
| 17 | |
| 18 | |
| 19 | class TestRaise(unittest.TestCase): |
| 20 | def test_invalid_reraise(self): |
| 21 | try: |
| 22 | raise |
| 23 | except RuntimeError as e: |
| 24 | self.failUnless("No active exception" in str(e)) |
| 25 | else: |
| 26 | self.fail("No exception raised") |
| 27 | |
| 28 | def test_reraise(self): |
| 29 | try: |
| 30 | try: |
| 31 | raise IndexError() |
| 32 | except IndexError as e: |
| 33 | exc1 = e |
| 34 | raise |
| 35 | except IndexError as exc2: |
| 36 | self.failUnless(exc1 is exc2) |
| 37 | else: |
| 38 | self.fail("No exception raised") |
| 39 | |
| 40 | |
| 41 | class TestCause(unittest.TestCase): |
| 42 | def test_invalid_cause(self): |
| 43 | try: |
| 44 | raise IndexError from 5 |
| 45 | except TypeError as e: |
| 46 | self.failUnless("exception cause" in str(e)) |
| 47 | else: |
| 48 | self.fail("No exception raised") |
| 49 | |
| 50 | def test_class_cause(self): |
| 51 | try: |
| 52 | raise IndexError from KeyError |
| 53 | except IndexError as e: |
| 54 | self.failUnless(isinstance(e.__cause__, KeyError)) |
| 55 | else: |
| 56 | self.fail("No exception raised") |
| 57 | |
| 58 | def test_instance_cause(self): |
| 59 | cause = KeyError() |
| 60 | try: |
| 61 | raise IndexError from cause |
| 62 | except IndexError as e: |
| 63 | self.failUnless(e.__cause__ is cause) |
| 64 | else: |
| 65 | self.fail("No exception raised") |
| 66 | |
| 67 | |
| 68 | class TestTraceback(unittest.TestCase): |
| 69 | def test_sets_traceback(self): |
| 70 | try: |
| 71 | raise IndexError() |
| 72 | except IndexError as e: |
| 73 | self.failUnless(isinstance(e.__traceback__, types.TracebackType)) |
| 74 | else: |
| 75 | self.fail("No exception raised") |
| 76 | |
| 77 | def test_accepts_traceback(self): |
| 78 | tb = get_tb() |
| 79 | try: |
| 80 | raise IndexError().with_traceback(tb) |
| 81 | except IndexError as e: |
| 82 | self.assertNotEqual(e.__traceback__, tb) |
| 83 | self.assertEqual(e.__traceback__.tb_next, tb) |
| 84 | else: |
| 85 | self.fail("No exception raised") |
| 86 | |
| 87 | |
| 88 | # Disabled until context is implemented |
| 89 | # class TestContext(object): |
| 90 | # def test_instance_context_bare_raise(self): |
| 91 | # context = IndexError() |
| 92 | # try: |
| 93 | # try: |
| 94 | # raise context |
| 95 | # except: |
| 96 | # raise OSError() |
| 97 | # except OSError as e: |
| 98 | # self.assertEqual(e.__context__, context) |
| 99 | # else: |
| 100 | # self.fail("No exception raised") |
| 101 | # |
| 102 | # def test_class_context_bare_raise(self): |
| 103 | # context = IndexError |
| 104 | # try: |
| 105 | # try: |
| 106 | # raise context |
| 107 | # except: |
| 108 | # raise OSError() |
| 109 | # except OSError as e: |
| 110 | # self.assertNotEqual(e.__context__, context) |
| 111 | # self.failUnless(isinstance(e.__context__, context)) |
| 112 | # else: |
| 113 | # self.fail("No exception raised") |
| 114 | |
| 115 | |
| 116 | class TestRemovedFunctionality(unittest.TestCase): |
| 117 | def test_tuples(self): |
| 118 | try: |
| 119 | raise (IndexError, KeyError) # This should be a tuple! |
| 120 | except TypeError: |
| 121 | pass |
| 122 | else: |
| 123 | self.fail("No exception raised") |
| 124 | |
| 125 | def test_strings(self): |
| 126 | try: |
| 127 | raise "foo" |
| 128 | except TypeError: |
| 129 | pass |
| 130 | else: |
| 131 | self.fail("No exception raised") |
| 132 | |
| 133 | |
| 134 | def test_main(): |
| 135 | test_support.run_unittest(__name__) |
| 136 | |
| 137 | |
| 138 | if __name__ == "__main__": |
| 139 | unittest.main() |