0001 """Test cases for traceback module""" 0002 0003 import unittest 0004 from test.test_support import run_unittest, is_jython 0005 0006 import traceback 0007 0008 class TracebackCases(unittest.TestCase): 0009 # For now, a very minimal set of tests. I want to be sure that 0010 # formatting of SyntaxErrors works based on changes for 2.1. 0011 0012 def get_exception_format(self, func, exc): 0013 try: 0014 func() 0015 except exc, value: 0016 return traceback.format_exception_only(exc, value) 0017 else: 0018 raise ValueError, "call did not raise exception" 0019 0020 def syntax_error_with_caret(self): 0021 compile("def fact(x):\n\treturn x!\n", "?", "exec") 0022 0023 def syntax_error_without_caret(self): 0024 # XXX why doesn't compile raise the same traceback? 0025 import test.badsyntax_nocaret 0026 0027 def test_caret(self): 0028 err = self.get_exception_format(self.syntax_error_with_caret, 0029 SyntaxError) 0030 self.assert_(len(err) == 4) 0031 self.assert_("^" in err[2]) # third line has caret 0032 self.assert_(err[1].strip() == "return x!") 0033 0034 def test_nocaret(self): 0035 if is_jython: 0036 # jython adds a caret in this case (why shouldn't it?) 0037 return 0038 err = self.get_exception_format(self.syntax_error_without_caret, 0039 SyntaxError) 0040 self.assert_(len(err) == 3) 0041 self.assert_(err[1].strip() == "[x for x in x] = x") 0042 0043 def test_bug737473(self): 0044 import sys, os, tempfile, time 0045 0046 savedpath = sys.path[:] 0047 testdir = tempfile.mkdtemp() 0048 try: 0049 sys.path.insert(0, testdir) 0050 testfile = os.path.join(testdir, 'test_bug737473.py') 0051 print >> open(testfile, 'w'), """ 0052 def test(): 0053 raise ValueError""" 0054 0055 if 'test_bug737473' in sys.modules: 0056 del sys.modules['test_bug737473'] 0057 import test_bug737473 0058 0059 try: 0060 test_bug737473.test() 0061 except ValueError: 0062 # this loads source code to linecache 0063 traceback.extract_tb(sys.exc_traceback) 0064 0065 # If this test runs too quickly, test_bug737473.py's mtime 0066 # attribute will remain unchanged even if the file is rewritten. 0067 # Consequently, the file would not reload. So, added a sleep() 0068 # delay to assure that a new, distinct timestamp is written. 0069 # Since WinME with FAT32 has multisecond resolution, more than 0070 # three seconds are needed for this test to pass reliably :-( 0071 time.sleep(4) 0072 0073 print >> open(testfile, 'w'), """ 0074 def test(): 0075 raise NotImplementedError""" 0076 reload(test_bug737473) 0077 try: 0078 test_bug737473.test() 0079 except NotImplementedError: 0080 src = traceback.extract_tb(sys.exc_traceback)[-1][-1] 0081 self.failUnlessEqual(src, 'raise NotImplementedError') 0082 finally: 0083 sys.path[:] = savedpath 0084 for f in os.listdir(testdir): 0085 os.unlink(os.path.join(testdir, f)) 0086 os.rmdir(testdir) 0087 0088 def test_main(): 0089 run_unittest(TracebackCases) 0090 0091 0092 if __name__ == "__main__": 0093 test_main() 0094
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