add hg and python

sys/lib/python/test/test_traceback.py

@@ -0,0 +1,162 @@
+"""Test cases for traceback module"""
+
+import unittest
+from test.test_support import run_unittest, is_jython
+
+import traceback
+
+class TracebackCases(unittest.TestCase):
+    # For now, a very minimal set of tests.  I want to be sure that
+    # formatting of SyntaxErrors works based on changes for 2.1.
+
+    def get_exception_format(self, func, exc):
+        try:
+            func()
+        except exc, value:
+            return traceback.format_exception_only(exc, value)
+        else:
+            raise ValueError, "call did not raise exception"
+
+    def syntax_error_with_caret(self):
+        compile("def fact(x):\n\treturn x!\n", "?", "exec")
+
+    def syntax_error_without_caret(self):
+        # XXX why doesn't compile raise the same traceback?
+        import test.badsyntax_nocaret
+
+    def syntax_error_bad_indentation(self):
+        compile("def spam():\n  print 1\n print 2", "?", "exec")
+
+    def test_caret(self):
+        err = self.get_exception_format(self.syntax_error_with_caret,
+                                        SyntaxError)
+        self.assert_(len(err) == 4)
+        self.assert_(err[1].strip() == "return x!")
+        self.assert_("^" in err[2]) # third line has caret
+        self.assert_(err[1].find("!") == err[2].find("^")) # in the right place
+
+    def test_nocaret(self):
+        if is_jython:
+            # jython adds a caret in this case (why shouldn't it?)
+            return
+        err = self.get_exception_format(self.syntax_error_without_caret,
+                                        SyntaxError)
+        self.assert_(len(err) == 3)
+        self.assert_(err[1].strip() == "[x for x in x] = x")
+
+    def test_bad_indentation(self):
+        err = self.get_exception_format(self.syntax_error_bad_indentation,
+                                        IndentationError)
+        self.assert_(len(err) == 4)
+        self.assert_(err[1].strip() == "print 2")
+        self.assert_("^" in err[2])
+        self.assert_(err[1].find("2") == err[2].find("^"))
+
+    def test_bug737473(self):
+        import sys, os, tempfile, time
+
+        savedpath = sys.path[:]
+        testdir = tempfile.mkdtemp()
+        try:
+            sys.path.insert(0, testdir)
+            testfile = os.path.join(testdir, 'test_bug737473.py')
+            print >> open(testfile, 'w'), """
+def test():
+    raise ValueError"""
+
+            if 'test_bug737473' in sys.modules:
+                del sys.modules['test_bug737473']
+            import test_bug737473
+
+            try:
+                test_bug737473.test()
+            except ValueError:
+                # this loads source code to linecache
+                traceback.extract_tb(sys.exc_traceback)
+
+            # If this test runs too quickly, test_bug737473.py's mtime
+            # attribute will remain unchanged even if the file is rewritten.
+            # Consequently, the file would not reload.  So, added a sleep()
+            # delay to assure that a new, distinct timestamp is written.
+            # Since WinME with FAT32 has multisecond resolution, more than
+            # three seconds are needed for this test to pass reliably :-(
+            time.sleep(4)
+
+            print >> open(testfile, 'w'), """
+def test():
+    raise NotImplementedError"""
+            reload(test_bug737473)
+            try:
+                test_bug737473.test()
+            except NotImplementedError:
+                src = traceback.extract_tb(sys.exc_traceback)[-1][-1]
+                self.failUnlessEqual(src, 'raise NotImplementedError')
+        finally:
+            sys.path[:] = savedpath
+            for f in os.listdir(testdir):
+                os.unlink(os.path.join(testdir, f))
+            os.rmdir(testdir)
+
+    def test_members(self):
+        # Covers Python/structmember.c::listmembers()
+        try:
+            1/0
+        except:
+            import sys
+            sys.exc_traceback.__members__
+
+    def test_base_exception(self):
+        # Test that exceptions derived from BaseException are formatted right
+        e = KeyboardInterrupt()
+        lst = traceback.format_exception_only(e.__class__, e)
+        self.assertEqual(lst, ['KeyboardInterrupt\n'])
+
+    # String exceptions are deprecated, but legal.  The quirky form with
+    # separate "type" and "value" tends to break things, because
+    #     not isinstance(value, type)
+    # and a string cannot be the first argument to issubclass.
+    #
+    # Note that sys.last_type and sys.last_value do not get set if an
+    # exception is caught, so we sort of cheat and just emulate them.
+    #
+    # test_string_exception1 is equivalent to
+    #
+    # >>> raise "String Exception"
+    #
+    # test_string_exception2 is equivalent to
+    #
+    # >>> raise "String Exception", "String Value"
+    #
+    def test_string_exception1(self):
+        str_type = "String Exception"
+        err = traceback.format_exception_only(str_type, None)
+        self.assertEqual(len(err), 1)
+        self.assertEqual(err[0], str_type + '\n')
+
+    def test_string_exception2(self):
+        str_type = "String Exception"
+        str_value = "String Value"
+        err = traceback.format_exception_only(str_type, str_value)
+        self.assertEqual(len(err), 1)
+        self.assertEqual(err[0], str_type + ': ' + str_value + '\n')
+
+    def test_format_exception_only_bad__str__(self):
+        class X(Exception):
+            def __str__(self):
+                1/0
+        err = traceback.format_exception_only(X, X())
+        self.assertEqual(len(err), 1)
+        str_value = '<unprintable %s object>' % X.__name__
+        self.assertEqual(err[0], X.__name__ + ': ' + str_value + '\n')
+
+    def test_without_exception(self):
+        err = traceback.format_exception_only(None, None)
+        self.assertEqual(err, ['None\n'])
+
+
+def test_main():
+    run_unittest(TracebackCases)
+
+
+if __name__ == "__main__":
+    test_main()