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[3.10] bpo-44600: Fix line numbers for pattern matching cleanup code (GH-27346) (GH-27356)

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(cherry picked from commit 4214f470f0)


Co-authored-by: Charles Burkland <charles.aburkland@gmail.com>

Automerge-Triggered-By: GH:brandtbucher
This commit is contained in:
Miss Islington (bot) 2021-07-25 17:04:06 -07:00 • committed by GitHub
parent 628baf6fef
commit 01601aa736
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3 changed files with 89 additions and 4 deletions
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76
Lib/test/test_patma.py
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@ -3,6 +3,7 @@
import dataclasses
import enum
import inspect
import sys
import unittest
@ -3056,6 +3057,81 @@ class Keys:
self.assertIs(z, None)
class TestTracing(unittest.TestCase):
def _test_trace(self, func, expected_linenos, *f_args):
actual_linenos = set()
def trace(frame, event, arg):
if frame.f_code.co_name == func.__name__:
relative_lineno = frame.f_lineno - func.__code__.co_firstlineno
actual_linenos.add(relative_lineno)
return trace
sys.settrace(trace)
func(*f_args)
sys.settrace(None)
self.assertSetEqual(actual_linenos, expected_linenos)
def test_default_case_traces_correctly_a(self):
def default_no_assign(command): # 0
match command.split(): # 1
case ["go", direction] if direction in "nesw": # 2
return f"go {direction}" # 3
case ["go", _]: # 4
return "no go" # 5
case _: # 6
return "default" # 7
self._test_trace(default_no_assign, {0, 1, 2, 3}, "go n")
self._test_trace(default_no_assign, {0, 1, 2, 4, 5}, "go x")
self._test_trace(default_no_assign, {0, 1, 2, 4, 6, 7}, "spam")
def test_default_case_traces_correctly_b(self):
def default_wildcard_assign(command): # 0
match command.split(): # 1
case ["go", direction] if direction in "nesw": # 2
return f"go {direction}" # 3
case ["go", _]: # 4
return "no go" # 5
case x: # 6
return x # 7
self._test_trace(default_wildcard_assign, {0, 1, 2, 3}, "go n")
self._test_trace(default_wildcard_assign, {0, 1, 2, 4, 5}, "go x")
self._test_trace(default_wildcard_assign, {0, 1, 2, 4, 6, 7}, "spam")
def test_default_case_traces_correctly_c(self):
def no_default(command): # 0
match command.split(): # 1
case ["go", direction] if direction in "nesw": # 2
return f"go {direction}" # 3
case ["go", _]: # 4
return "no go" # 5
self._test_trace(no_default, {0, 1, 2, 3}, "go n")
self._test_trace(no_default, {0, 1, 2, 4, 5}, "go x")
self._test_trace(no_default, {0, 1, 2, 4}, "spam")
def test_default_case_traces_correctly_d(self):
def only_default_no_assign(command): # 0
match command.split(): # 1
case _: # 2
return "default" # 3
self._test_trace(only_default_no_assign, {0, 1, 2, 3}, "go n")
self._test_trace(only_default_no_assign, {0, 1, 2, 3} , "go x")
self._test_trace(only_default_no_assign, {0, 1, 2, 3}, "spam")
def test_default_case_traces_correctly_e(self):
def only_default_wildcard_assign(command): # 0
match command.split(): # 1
case x: # 2
return x # 3
self._test_trace(only_default_wildcard_assign, {0, 1, 2, 3}, "go n")
self._test_trace(only_default_wildcard_assign, {0, 1, 2, 3} , "go x")
self._test_trace(only_default_wildcard_assign, {0, 1, 2, 3}, "spam")
if __name__ == "__main__":
"""
# From inside environment using this Python, with pyperf installed: