mirror of https://github.com/python/cpython
118 lines
4.0 KiB
Python
118 lines
4.0 KiB
Python
"""Test cases for traceback module"""
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import unittest
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from test.test_support import run_unittest, is_jython
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import traceback
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class TracebackCases(unittest.TestCase):
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# For now, a very minimal set of tests. I want to be sure that
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# formatting of SyntaxErrors works based on changes for 2.1.
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def get_exception_format(self, func, exc):
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try:
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func()
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except exc, value:
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return traceback.format_exception_only(exc, value)
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else:
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raise ValueError, "call did not raise exception"
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def syntax_error_with_caret(self):
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compile("def fact(x):\n\treturn x!\n", "?", "exec")
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def syntax_error_without_caret(self):
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# XXX why doesn't compile raise the same traceback?
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import test.badsyntax_nocaret
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def syntax_error_bad_indentation(self):
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compile("def spam():\n print 1\n print 2", "?", "exec")
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def test_caret(self):
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err = self.get_exception_format(self.syntax_error_with_caret,
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SyntaxError)
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self.assert_(len(err) == 4)
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self.assert_("^" in err[2]) # third line has caret
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self.assert_(err[1].strip() == "return x!")
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def test_nocaret(self):
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if is_jython:
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# jython adds a caret in this case (why shouldn't it?)
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return
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err = self.get_exception_format(self.syntax_error_without_caret,
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SyntaxError)
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self.assert_(len(err) == 3)
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self.assert_(err[1].strip() == "[x for x in x] = x")
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def test_bad_indentation(self):
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err = self.get_exception_format(self.syntax_error_bad_indentation,
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IndentationError)
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self.assert_(len(err) == 4)
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self.assert_("^" in err[2])
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self.assert_(err[1].strip() == "print 2")
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def test_bug737473(self):
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import sys, os, tempfile, time
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savedpath = sys.path[:]
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testdir = tempfile.mkdtemp()
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try:
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sys.path.insert(0, testdir)
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testfile = os.path.join(testdir, 'test_bug737473.py')
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print >> open(testfile, 'w'), """
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def test():
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raise ValueError"""
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if 'test_bug737473' in sys.modules:
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del sys.modules['test_bug737473']
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import test_bug737473
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try:
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test_bug737473.test()
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except ValueError:
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# this loads source code to linecache
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traceback.extract_tb(sys.exc_traceback)
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# If this test runs too quickly, test_bug737473.py's mtime
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# attribute will remain unchanged even if the file is rewritten.
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# Consequently, the file would not reload. So, added a sleep()
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# delay to assure that a new, distinct timestamp is written.
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# Since WinME with FAT32 has multisecond resolution, more than
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# three seconds are needed for this test to pass reliably :-(
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time.sleep(4)
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print >> open(testfile, 'w'), """
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def test():
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raise NotImplementedError"""
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reload(test_bug737473)
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try:
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test_bug737473.test()
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except NotImplementedError:
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src = traceback.extract_tb(sys.exc_traceback)[-1][-1]
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self.failUnlessEqual(src, 'raise NotImplementedError')
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finally:
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sys.path[:] = savedpath
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for f in os.listdir(testdir):
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os.unlink(os.path.join(testdir, f))
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os.rmdir(testdir)
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def test_members(self):
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# Covers Python/structmember.c::listmembers()
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try:
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1/0
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except:
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import sys
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sys.exc_traceback.__members__
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def test_base_exception(self):
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# Test that exceptions derived from BaseException are formatted right
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e = KeyboardInterrupt()
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lst = traceback.format_exception_only(e.__class__, e)
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self.assertEqual(lst, ['KeyboardInterrupt\n'])
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def test_main():
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run_unittest(TracebackCases)
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if __name__ == "__main__":
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test_main()
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