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bpo-38530: Require 50% similarity in NameError and AttributeError suggestions (GH-25584)

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Dennis Sweeney 2021-04-26 20:22:27 -04:00 committed by GitHub
parent 7244c0060d
commit 284c52da09
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2 changed files with 116 additions and 1 deletions
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112
Lib/test/test_exceptions.py
View file

@ -1507,6 +1507,61 @@ def f():
self.assertNotIn("somethingverywronghehe", err.getvalue())
def test_name_error_bad_suggestions_do_not_trigger_for_small_names(self):
vvv = mom = w = id = pytho = None
with self.subTest(name="b"):
try:
b
except NameError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
with self.subTest(name="v"):
try:
v
except NameError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
with self.subTest(name="m"):
try:
m
except NameError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
with self.subTest(name="py"):
try:
py
except NameError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
def test_name_error_suggestions_do_not_trigger_for_too_many_locals(self):
def f():
# Mutating locals() is unreliable, so we need to do it by hand
@ -1661,6 +1716,63 @@ class A:
self.assertNotIn("blech", err.getvalue())
def test_getattr_error_bad_suggestions_do_not_trigger_for_small_names(self):
class MyClass:
vvv = mom = w = id = pytho = None
with self.subTest(name="b"):
try:
MyClass.b
except AttributeError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
with self.subTest(name="v"):
try:
MyClass.v
except AttributeError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
with self.subTest(name="m"):
try:
MyClass.m
except AttributeError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
with self.subTest(name="py"):
try:
MyClass.py
except AttributeError as exc:
with support.captured_stderr() as err:
sys.__excepthook__(*sys.exc_info())
self.assertNotIn("you mean", err.getvalue())
self.assertNotIn("vvv", err.getvalue())
self.assertNotIn("mom", err.getvalue())
self.assertNotIn("'id'", err.getvalue())
self.assertNotIn("'w'", err.getvalue())
self.assertNotIn("'pytho'", err.getvalue())
def test_getattr_suggestions_do_not_trigger_for_big_dicts(self):
class A:
blech = None

5
Python/suggestions.c
View file

@ -102,7 +102,10 @@ calculate_suggestions(PyObject *dir,
if (current_distance == -1) {
return NULL;
}
if (current_distance == 0 || current_distance > MAX_DISTANCE) {
if (current_distance == 0 ||
current_distance > MAX_DISTANCE ||
current_distance * 2 > name_size)
{
continue;
}
if (!suggestion || current_distance < suggestion_distance) {