from numpy.testing import (
assert_raises,
assert_warns,
assert_,
assert_equal,
IS_WASM,
)
from numpy.compat import pickle
import pytest
import sys
import subprocess
import textwrap
from importlib import reload
def test_numpy_reloading():
# gh-7844. Also check that relevant globals retain their identity.
import numpy as np
import numpy._globals
_NoValue = np._NoValue
VisibleDeprecationWarning = np.VisibleDeprecationWarning
ModuleDeprecationWarning = np.ModuleDeprecationWarning
with assert_warns(UserWarning):
reload(np)
assert_(_NoValue is np._NoValue)
assert_(ModuleDeprecationWarning is np.ModuleDeprecationWarning)
assert_(VisibleDeprecationWarning is np.VisibleDeprecationWarning)
assert_raises(RuntimeError, reload, numpy._globals)
with assert_warns(UserWarning):
reload(np)
assert_(_NoValue is np._NoValue)
assert_(ModuleDeprecationWarning is np.ModuleDeprecationWarning)
assert_(VisibleDeprecationWarning is np.VisibleDeprecationWarning)
def test_novalue():
import numpy as np
for proto in range(2, pickle.HIGHEST_PROTOCOL + 1):
assert_equal(repr(np._NoValue), '<no value>')
assert_(pickle.loads(pickle.dumps(np._NoValue,
protocol=proto)) is np._NoValue)
@pytest.mark.skipif(IS_WASM, reason="can't start subprocess")
def test_full_reimport():
"""At the time of writing this, it is *not* truly supported, but
apparently enough users rely on it, for it to be an annoying change
when it started failing previously.
"""
# Test within a new process, to ensure that we do not mess with the
# global state during the test run (could lead to cryptic test failures).
# This is generally unsafe, especially, since we also reload the C-modules.
code = textwrap.dedent(r"""
import sys
from pytest import warns
import numpy as np
for k in list(sys.modules.keys()):
if "numpy" in k:
del sys.modules[k]
with warns(UserWarning):
import numpy as np
""")
p = subprocess.run([sys.executable, '-c', code], capture_output=True)
if p.returncode:
raise AssertionError(
f"Non-zero return code: {p.returncode!r}\n\n{p.stderr.decode()}"
)
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