Fix parsing of octal literal by patchedast

Author: lieryan

rope/refactor/patchedast.py

@@ -940,7 +940,7 @@ def __getslice__(self, i, j):
 
     def _get_number_pattern(self):
         # HACK: It is merely an approaximation and does the job
-        integer = r"\-?(0x[\da-fA-F]+|\d+)"
+        integer = r"\-?(0[xo][\da-fA-F]+|\d+)"
         return r"(%s(\.\d*)?|(\.\d+))([eE][-+]?\d+)?[jJ]?" % integer
 
     _string_pattern = None

ropetest/refactor/patchedasttest.py

@@ -94,13 +94,14 @@ def test_hex_integer_literals_and_region(self):
         checker.check_region("Num", start, start + 3)
 
     def test_octal_integer_literals_and_region(self):
-        source = "a = -0125e1\n"
+        source = "a = -0o1251\n"
         ast_frag = patchedast.get_patched_ast(source, True)
         checker = _ResultChecker(self, ast_frag)
-        start = source.index("-0125e1") + 1
+        start = source.index("-0o1251") + 1
         end = start + 6
         # Python 3 parses as UnaryOp(op=USub(), operand=Num(n=10))
         checker.check_region("Num", start, end)
+        checker.check_children("Num", ["0o1251"])
 
     def test_integer_literals_and_sorted_children(self):
         source = "a = 10\n"