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TST: attempt to make test_load_refcount deterministic #6576

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Oct 29, 2015
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TST: attempt to make test_load_refcount deterministic #6576

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17 changes: 11 additions & 6 deletions numpy/lib/tests/test_io.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1905,12 +1905,17 @@ def test_load_refcount():
np.savez(f, [1, 2, 3])
f.seek(0)

gc.collect()
n_before = len(gc.get_objects())
np.load(f)
n_after = len(gc.get_objects())

assert_equal(n_before, n_after)
assert_(gc.isenabled())
gc.disable()
try:
gc.collect()
np.load(f)
# gc.collect returns the number of unreachable objects in cycles that
# were found -- we are checking that no cycles were created by np.load
n_objects_in_cycles = gc.collect()
finally:
gc.enable()
assert_equal(n_objects_in_cycles, 0)

if __name__ == "__main__":
run_module_suite()