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[3.12] gh-113628: Fix test_site test with long stdlib paths (GH-113640) #113671

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Merged
merged 1 commit into from
Jan 3, 2024
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[3.12] gh-113628: Fix test_site test with long stdlib paths (GH-113640) #113671

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43 changes: 21 additions & 22 deletions Lib/test/test_site.py
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Original file line number Diff line number Diff line change
Expand Up @@ -603,10 +603,24 @@ def _calc_sys_path_for_underpth_nosite(self, sys_prefix, lines):
sys_path.append(abs_path)
return sys_path

def _get_pth_lines(self, libpath: str, *, import_site: bool):
pth_lines = ['fake-path-name']
# include 200 lines of `libpath` in _pth lines (or fewer
# if the `libpath` is long enough to get close to 32KB
# see https://github.com/python/cpython/issues/113628)
encoded_libpath_length = len(libpath.encode("utf-8"))
repetitions = min(200, 30000 // encoded_libpath_length)
if repetitions <= 2:
self.skipTest(
f"Python stdlib path is too long ({encoded_libpath_length:,} bytes)")
pth_lines.extend(libpath for _ in range(repetitions))
pth_lines.extend(['', '# comment'])
if import_site:
pth_lines.append('import site')
return pth_lines

@support.requires_subprocess()
def test_underpth_basic(self):
libpath = test.support.STDLIB_DIR
exe_prefix = os.path.dirname(sys.executable)
pth_lines = ['#.', '# ..', *sys.path, '.', '..']
exe_file = self._create_underpth_exe(pth_lines)
sys_path = self._calc_sys_path_for_underpth_nosite(
Expand All @@ -628,12 +642,7 @@ def test_underpth_basic(self):
def test_underpth_nosite_file(self):
libpath = test.support.STDLIB_DIR
exe_prefix = os.path.dirname(sys.executable)
pth_lines = [
'fake-path-name',
*[libpath for _ in range(200)],
'',
'# comment',
]
pth_lines = self._get_pth_lines(libpath, import_site=False)
exe_file = self._create_underpth_exe(pth_lines)
sys_path = self._calc_sys_path_for_underpth_nosite(
os.path.dirname(exe_file),
Expand All @@ -657,13 +666,8 @@ def test_underpth_nosite_file(self):
def test_underpth_file(self):
libpath = test.support.STDLIB_DIR
exe_prefix = os.path.dirname(sys.executable)
exe_file = self._create_underpth_exe([
'fake-path-name',
*[libpath for _ in range(200)],
'',
'# comment',
'import site'
])
exe_file = self._create_underpth_exe(
self._get_pth_lines(libpath, import_site=True))
sys_prefix = os.path.dirname(exe_file)
env = os.environ.copy()
env['PYTHONPATH'] = 'from-env'
Expand All @@ -682,13 +686,8 @@ def test_underpth_file(self):
def test_underpth_dll_file(self):
libpath = test.support.STDLIB_DIR
exe_prefix = os.path.dirname(sys.executable)
exe_file = self._create_underpth_exe([
'fake-path-name',
*[libpath for _ in range(200)],
'',
'# comment',
'import site'
], exe_pth=False)
exe_file = self._create_underpth_exe(
self._get_pth_lines(libpath, import_site=True), exe_pth=False)
sys_prefix = os.path.dirname(exe_file)
env = os.environ.copy()
env['PYTHONPATH'] = 'from-env'
Expand Down