`test_parserhack` in `test_future` is outdated

[sobolevn]

Bug report

This test is written for python2.6, which is long gone. It tests some implementation detail with is also long gone:

cpython/Lib/test/test_future_stmt/test_future.py

Lines 174 to 192 in 2cf18a4

	def test_parserhack(self):
	# test that the parser.c::future_hack function works as expected
	# Note: although this test must pass, it's not testing the original
	# bug as of 2.6 since the with statement is not optional and
	# the parser hack disabled. If a new keyword is introduced in
	# 2.6, change this to refer to the new future import.
	try:
	exec("from __future__ import print_function; print 0")
	except SyntaxError:
	pass
	else:
	self.fail("syntax error didn't occur")
	try:
	exec("from __future__ import (print_function); print 0")
	except SyntaxError:
	pass
	else:
	self.fail("syntax error didn't occur")

We have new tests for print keyword in other modules:

cpython/Lib/test/test_exceptions.py

Lines 176 to 183 in 2cf18a4

	s = '''print "old style"'''
	ckmsg(s, "Missing parentheses in call to 'print'. Did you mean print(...)?")
	s = '''print "old style",'''
	ckmsg(s, "Missing parentheses in call to 'print'. Did you mean print(...)?")
	s = 'print f(a+b,c)'
	ckmsg(s, "Missing parentheses in call to 'print'. Did you mean print(...)?")

I propose to remove this test, it does not add any value and might be confusing to readers.

Linked PRs

• gh-116860: Remove outdated test_parserhack from test_future #116861
• [3.12] gh-116860: Remove outdated test_parserhack from test_future (GH-116861) #119648
• [3.13] gh-116860: Remove outdated test_parserhack from test_future (GH-116861) #119649

[serhiy-storchaka]

For reference, the tested code was dead since 3.1 (e3944a5).