1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
|
# Python test set -- part 5, built-in exceptions
import os
import sys
import unittest
import warnings
import pickle, cPickle
from test.test_support import TESTFN, unlink, run_unittest
# XXX This is not really enough, each *operation* should be tested!
class ExceptionTests(unittest.TestCase):
def testReload(self):
# Reloading the built-in exceptions module failed prior to Py2.2, while it
# should act the same as reloading built-in sys.
try:
import exceptions
reload(exceptions)
except ImportError, e:
self.fail("reloading exceptions: %s" % e)
def raise_catch(self, exc, excname):
try:
raise exc, "spam"
except exc, err:
buf1 = str(err)
try:
raise exc("spam")
except exc, err:
buf2 = str(err)
self.assertEquals(buf1, buf2)
self.assertEquals(exc.__name__, excname)
def testRaising(self):
self.raise_catch(AttributeError, "AttributeError")
self.assertRaises(AttributeError, getattr, sys, "undefined_attribute")
self.raise_catch(EOFError, "EOFError")
fp = open(TESTFN, 'w')
fp.close()
fp = open(TESTFN, 'r')
savestdin = sys.stdin
try:
try:
sys.stdin = fp
x = raw_input()
except EOFError:
pass
finally:
sys.stdin = savestdin
fp.close()
unlink(TESTFN)
self.raise_catch(IOError, "IOError")
self.assertRaises(IOError, open, 'this file does not exist', 'r')
self.raise_catch(ImportError, "ImportError")
self.assertRaises(ImportError, __import__, "undefined_module")
self.raise_catch(IndexError, "IndexError")
x = []
self.assertRaises(IndexError, x.__getitem__, 10)
self.raise_catch(KeyError, "KeyError")
x = {}
self.assertRaises(KeyError, x.__getitem__, 'key')
self.raise_catch(KeyboardInterrupt, "KeyboardInterrupt")
self.raise_catch(MemoryError, "MemoryError")
self.raise_catch(NameError, "NameError")
try: x = undefined_variable
except NameError: pass
self.raise_catch(OverflowError, "OverflowError")
x = 1
for dummy in range(128):
x += x # this simply shouldn't blow up
self.raise_catch(RuntimeError, "RuntimeError")
self.raise_catch(SyntaxError, "SyntaxError")
try: exec '/\n'
except SyntaxError: pass
self.raise_catch(IndentationError, "IndentationError")
self.raise_catch(TabError, "TabError")
# can only be tested under -tt, and is the only test for -tt
#try: compile("try:\n\t1/0\n \t1/0\nfinally:\n pass\n", '<string>', 'exec')
#except TabError: pass
#else: self.fail("TabError not raised")
self.raise_catch(SystemError, "SystemError")
self.raise_catch(SystemExit, "SystemExit")
self.assertRaises(SystemExit, sys.exit, 0)
self.raise_catch(TypeError, "TypeError")
try: [] + ()
except TypeError: pass
self.raise_catch(ValueError, "ValueError")
self.assertRaises(ValueError, chr, 10000)
self.raise_catch(ZeroDivisionError, "ZeroDivisionError")
try: x = 1/0
except ZeroDivisionError: pass
self.raise_catch(Exception, "Exception")
try: x = 1/0
except Exception, e: pass
def testSyntaxErrorMessage(self):
# make sure the right exception message is raised for each of
# these code fragments
def ckmsg(src, msg):
try:
compile(src, '<fragment>', 'exec')
except SyntaxError, e:
if e.msg != msg:
self.fail("expected %s, got %s" % (msg, e.msg))
else:
self.fail("failed to get expected SyntaxError")
s = '''while 1:
try:
pass
finally:
continue'''
if not sys.platform.startswith('java'):
ckmsg(s, "'continue' not supported inside 'finally' clause")
s = '''if 1:
try:
continue
except:
pass'''
ckmsg(s, "'continue' not properly in loop")
ckmsg("continue\n", "'continue' not properly in loop")
def testSettingException(self):
# test that setting an exception at the C level works even if the
# exception object can't be constructed.
class BadException:
def __init__(self_):
raise RuntimeError, "can't instantiate BadException"
def test_capi1():
import _testcapi
try:
_testcapi.raise_exception(BadException, 1)
except TypeError, err:
exc, err, tb = sys.exc_info()
co = tb.tb_frame.f_code
self.assertEquals(co.co_name, "test_capi1")
self.assert_(co.co_filename.endswith('test_exceptions'+os.extsep+'py'))
else:
self.fail("Expected exception")
def test_capi2():
import _testcapi
try:
_testcapi.raise_exception(BadException, 0)
except RuntimeError, err:
exc, err, tb = sys.exc_info()
co = tb.tb_frame.f_code
self.assertEquals(co.co_name, "__init__")
self.assert_(co.co_filename.endswith('test_exceptions'+os.extsep+'py'))
co2 = tb.tb_frame.f_back.f_code
self.assertEquals(co2.co_name, "test_capi2")
else:
self.fail("Expected exception")
if not sys.platform.startswith('java'):
test_capi1()
test_capi2()
def test_WindowsError(self):
try:
WindowsError
except NameError:
pass
else:
self.failUnlessEqual(str(WindowsError(1001)),
"1001")
self.failUnlessEqual(str(WindowsError(1001, "message")),
"[Error 1001] message")
self.failUnlessEqual(WindowsError(1001, "message").errno, 22)
self.failUnlessEqual(WindowsError(1001, "message").winerror, 1001)
def testAttributes(self):
# test that exception attributes are happy
exceptionList = [
(BaseException, (), {'message' : '', 'args' : ()}),
(BaseException, (1, ), {'message' : 1, 'args' : (1,)}),
(BaseException, ('foo',),
{'message' : 'foo', 'args' : ('foo',)}),
(BaseException, ('foo', 1),
{'message' : '', 'args' : ('foo', 1)}),
(SystemExit, ('foo',),
{'message' : 'foo', 'args' : ('foo',), 'code' : 'foo'}),
(IOError, ('foo',),
{'message' : 'foo', 'args' : ('foo',), 'filename' : None,
'errno' : None, 'strerror' : None}),
(IOError, ('foo', 'bar'),
{'message' : '', 'args' : ('foo', 'bar'), 'filename' : None,
'errno' : 'foo', 'strerror' : 'bar'}),
(IOError, ('foo', 'bar', 'baz'),
{'message' : '', 'args' : ('foo', 'bar'), 'filename' : 'baz',
'errno' : 'foo', 'strerror' : 'bar'}),
(IOError, ('foo', 'bar', 'baz', 'quux'),
{'message' : '', 'args' : ('foo', 'bar', 'baz', 'quux')}),
(EnvironmentError, ('errnoStr', 'strErrorStr', 'filenameStr'),
{'message' : '', 'args' : ('errnoStr', 'strErrorStr'),
'strerror' : 'strErrorStr', 'errno' : 'errnoStr',
'filename' : 'filenameStr'}),
(EnvironmentError, (1, 'strErrorStr', 'filenameStr'),
{'message' : '', 'args' : (1, 'strErrorStr'), 'errno' : 1,
'strerror' : 'strErrorStr', 'filename' : 'filenameStr'}),
(SyntaxError, ('msgStr',),
{'message' : 'msgStr', 'args' : ('msgStr',), 'text' : None,
'print_file_and_line' : None, 'msg' : 'msgStr',
'filename' : None, 'lineno' : None, 'offset' : None}),
(SyntaxError, ('msgStr', ('filenameStr', 'linenoStr', 'offsetStr',
'textStr')),
{'message' : '', 'offset' : 'offsetStr', 'text' : 'textStr',
'args' : ('msgStr', ('filenameStr', 'linenoStr',
'offsetStr', 'textStr')),
'print_file_and_line' : None, 'msg' : 'msgStr',
'filename' : 'filenameStr', 'lineno' : 'linenoStr'}),
(SyntaxError, ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
'textStr', 'print_file_and_lineStr'),
{'message' : '', 'text' : None,
'args' : ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
'textStr', 'print_file_and_lineStr'),
'print_file_and_line' : None, 'msg' : 'msgStr',
'filename' : None, 'lineno' : None, 'offset' : None}),
(UnicodeError, (), {'message' : '', 'args' : (),}),
(UnicodeEncodeError, ('ascii', u'a', 0, 1, 'ordinal not in range'),
{'message' : '', 'args' : ('ascii', u'a', 0, 1,
'ordinal not in range'),
'encoding' : 'ascii', 'object' : u'a',
'start' : 0, 'reason' : 'ordinal not in range'}),
(UnicodeDecodeError, ('ascii', '\xff', 0, 1, 'ordinal not in range'),
{'message' : '', 'args' : ('ascii', '\xff', 0, 1,
'ordinal not in range'),
'encoding' : 'ascii', 'object' : '\xff',
'start' : 0, 'reason' : 'ordinal not in range'}),
(UnicodeTranslateError, (u"\u3042", 0, 1, "ouch"),
{'message' : '', 'args' : (u'\u3042', 0, 1, 'ouch'),
'object' : u'\u3042', 'reason' : 'ouch',
'start' : 0, 'end' : 1}),
]
try:
exceptionList.append(
(WindowsError, (1, 'strErrorStr', 'filenameStr'),
{'message' : '', 'args' : (1, 'strErrorStr'),
'strerror' : 'strErrorStr', 'winerror' : 1,
'errno' : 22, 'filename' : 'filenameStr'})
)
except NameError:
pass
for exc, args, expected in exceptionList:
try:
raise exc(*args)
except BaseException, e:
if type(e) is not exc:
raise
# Verify module name
self.assertEquals(type(e).__module__, 'exceptions')
# Verify no ref leaks in Exc_str()
s = str(e)
for checkArgName in expected:
self.assertEquals(repr(getattr(e, checkArgName)),
repr(expected[checkArgName]),
'exception "%s", attribute "%s"' %
(repr(e), checkArgName))
# test for pickling support
for p in pickle, cPickle:
for protocol in range(p.HIGHEST_PROTOCOL + 1):
new = p.loads(p.dumps(e, protocol))
for checkArgName in expected:
got = repr(getattr(new, checkArgName))
want = repr(expected[checkArgName])
self.assertEquals(got, want,
'pickled "%r", attribute "%s' %
(e, checkArgName))
def testSlicing(self):
# Test that you can slice an exception directly instead of requiring
# going through the 'args' attribute.
args = (1, 2, 3)
exc = BaseException(*args)
self.failUnlessEqual(exc[:], args)
def testKeywordArgs(self):
# test that builtin exception don't take keyword args,
# but user-defined subclasses can if they want
self.assertRaises(TypeError, BaseException, a=1)
class DerivedException(BaseException):
def __init__(self, fancy_arg):
BaseException.__init__(self)
self.fancy_arg = fancy_arg
x = DerivedException(fancy_arg=42)
self.assertEquals(x.fancy_arg, 42)
def testInfiniteRecursion(self):
def f():
return f()
self.assertRaises(RuntimeError, f)
def g():
try:
return g()
except ValueError:
return -1
self.assertRaises(RuntimeError, g)
def testUnicodeStrUsage(self):
# Make sure both instances and classes have a str and unicode
# representation.
self.failUnless(str(Exception))
self.failUnless(unicode(Exception))
self.failUnless(str(Exception('a')))
self.failUnless(unicode(Exception(u'a')))
def test_main():
run_unittest(ExceptionTests)
if __name__ == '__main__':
test_main()
|
