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bpo-37935: Added tests for os.walk(), glob.iglob() and Path.glob() (GH-15956)

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Test that they do not keep too many file descriptors open for the host OS in a reasonable test scenario.

See [bpo-37935](https://bugs.python.org/issue37935).
This commit is contained in:
Serhiy Storchaka 2019-09-12 15:54:48 +03:00 • committed by Gregory P. Smith
parent 5a4f82f457
commit f9dc2ad890
3 changed files with 59 additions and 0 deletions
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17
Lib/test/test_glob.py
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@ -264,6 +264,23 @@ class GlobTests(unittest.TestCase):
expect += [join('sym3', 'EF')]
eq(glob.glob(join('**', 'EF'), recursive=True), expect)
def test_glob_many_open_files(self):
depth = 30
base = os.path.join(self.tempdir, 'deep')
p = os.path.join(base, *(['d']*depth))
os.makedirs(p)
pattern = os.path.join(base, *(['*']*depth))
iters = [glob.iglob(pattern, recursive=True) for j in range(100)]
for it in iters:
self.assertEqual(next(it), p)
pattern = os.path.join(base, '**', 'd')
iters = [glob.iglob(pattern, recursive=True) for j in range(100)]
p = base
for i in range(depth):
p = os.path.join(p, 'd')
for it in iters:
self.assertEqual(next(it), p)
@skip_unless_symlink
class SymlinkLoopGlobTests(unittest.TestCase):