[Python-checkins] [3.6] compare with difflib not diff(1) (GH-5450) (GH-5453)
Benjamin Peterson
webhook-mailer at python.org
Tue Jan 30 14:31:16 EST 2018
https://github.com/python/cpython/commit/eb126eddbd7542ac9d7cd2736116aee2e0bd03dd
commit: eb126eddbd7542ac9d7cd2736116aee2e0bd03dd
branch: 3.6
author: Benjamin Peterson <benjamin at python.org>
committer: GitHub <noreply at github.com>
date: 2018-01-30T11:31:10-08:00
summary:
[3.6] compare with difflib not diff(1) (GH-5450) (GH-5453)
Co-authored-by: Benjamin Peterson <benjamin at python.org>
files:
M Lib/lib2to3/tests/test_parser.py
diff --git a/Lib/lib2to3/tests/test_parser.py b/Lib/lib2to3/tests/test_parser.py
index 9d444c204aa6..3fc499522454 100644
--- a/Lib/lib2to3/tests/test_parser.py
+++ b/Lib/lib2to3/tests/test_parser.py
@@ -12,6 +12,7 @@
from test.support import verbose
# Python imports
+import difflib
import importlib
import operator
import os
@@ -429,8 +430,8 @@ def test_all_project_files(self):
except ParseError as err:
self.fail('ParseError on file %s (%s)' % (filepath, err))
new = str(tree)
- x = diff(filepath, new, encoding=encoding)
- if x:
+ if new != source:
+ print(diff_texts(source, new, filepath))
self.fail("Idempotency failed: %s" % filepath)
def test_extended_unpacking(self):
@@ -473,14 +474,9 @@ def test_multiline_str_literals(self):
self.validate(s)
-def diff(fn, result, encoding='utf-8'):
- try:
- with open('@', 'w', encoding=encoding, newline='\n') as f:
- f.write(str(result))
- fn = fn.replace('"', '\\"')
- return subprocess.call(['diff', '-u', fn, '@'], stdout=(subprocess.DEVNULL if verbose < 1 else None))
- finally:
- try:
- os.remove("@")
- except OSError:
- pass
+def diff_texts(a, b, filename):
+ a = a.splitlines()
+ b = b.splitlines()
+ return difflib.unified_diff(a, b, filename, filename,
+ "(original)", "(reserialized)",
+ lineterm="")
More information about the Python-checkins
mailing list