File size: 2,532 Bytes
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Shared fixtures for the whole test suite, auto-loaded by pytest for every
file in this directory -- extracted from the original monolithic
test_dense_evolution.py when it was split by module (test_simulator.py,
test_registry.py, test_compiler.py, test_parser.py, test_chunk.py,
test_healing.py, test_integration.py).
"""
import os
import sys
import pytest
from dense_evolution import DenseSVSimulator
@pytest.hookimpl(trylast=True)
def pytest_sessionfinish(session, exitstatus):
"""
On macOS, force an immediate process exit instead of letting normal
Python interpreter shutdown run.
Reproduced on CI (macos-latest, Python 3.10, arm64): every test
passes, coverage.xml is written, pytest prints its own "N passed"
summary -- then, a few seconds later, the process dies with SIGSEGV
(exit 139) during interpreter finalization, after pytest's own work
is already done. Bisected by first ruling out Qiskit (an earlier fix
removed it from the process on macOS entirely; the crash persisted
unchanged), which leaves native-extension teardown -- most likely
JAX/XLA's runtime shutdown, a known category of issue on some
platforms -- as the remaining explanation. `trylast=True` ensures
this runs after pytest-cov's own pytest_sessionfinish (which writes
coverage.xml), so nothing meaningful is skipped; os._exit() bypasses
Python's normal atexit/finalization machinery entirely, which is
exactly the phase that was crashing.
"""
if sys.platform == 'darwin':
sys.stdout.flush()
sys.stderr.flush()
os._exit(exitstatus)
# ─────────────────────────────────────────────────────────────
# FIXTURES
# ─────────────────────────────────────────────────────────────
@pytest.fixture
def sim2():
"""Fresh 2-qubit simulator (NumPy CPU, float64)"""
return DenseSVSimulator(n_qubits=2, use_gpu=False, use_float32=False)
@pytest.fixture
def sim3():
"""Fresh 3-qubit simulator (NumPy CPU, float64)"""
return DenseSVSimulator(n_qubits=3, use_gpu=False, use_float32=False)
@pytest.fixture
def sim4():
"""Fresh 4-qubit simulator (NumPy CPU, float64)"""
return DenseSVSimulator(n_qubits=4, use_gpu=False, use_float32=False)
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