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test(jax): JAX-version-robust goldens for multi/rectangular* pixelization #166

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Merged
Jammy2211 merged 1 commit into from
Jul 14, 2026
Merged

test(jax): JAX-version-robust goldens for multi/rectangular* pixelization #166

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16 changes: 13 additions & 3 deletions scripts/jax_likelihood_functions/multi/rectangular.py
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Original file line number Diff line number Diff line change
Expand Up @@ -198,13 +198,20 @@
print("JAX Time Taken using VMAP:", time.time() - start)
print("JAX Time Taken per Likelihood:", (time.time() - start) / batch_size)

# The absolute pin is a GROSS-change guard only (order-of-magnitude / sign / NaN),
# hence `rtol=1e-2`: a pixelized inversion's log-likelihood drifts by a small,
# JAX-version-dependent amount (measured ~2.6e-4 rel here between jax 0.9.2 and
# 0.10.2; the sibling MGE script drifts ~1.8e-3) because the NNLS solve and the
# linear-algebra reduction order change across JAX releases. That is convergence
# jitter, not a correctness regression. The EXACT, JAX-version-robust check is the
# vmap == jit round-trip asserted below.
EXPECTED_VMAP_LOG_LIKELIHOOD = -12928.70087095

np.testing.assert_allclose(
np.array(result),
EXPECTED_VMAP_LOG_LIKELIHOOD,
rtol=1e-4,
err_msg="multi/rectangular: JAX vmap likelihood mismatch",
rtol=1e-2,
err_msg="multi/rectangular: JAX vmap likelihood gross mismatch",
)


Expand All @@ -228,5 +235,8 @@ def log_l_jit_fn(parameters):

print("JIT log_likelihood_function:", log_l_jit)
assert isinstance(log_l_jit, jnp.ndarray), f"expected jax.Array, got {type(log_l_jit)}"
np.testing.assert_allclose(float(log_l_jit), EXPECTED_VMAP_LOG_LIKELIHOOD, rtol=1e-4)
# The real check: jit == vmap (same computation, two transforms) — exact to 1e-4
# on any JAX version. Compare against the vmap result, not the absolute golden,
# so this stays green across JAX releases (cf. multi/rectangular_mge.py).
np.testing.assert_allclose(float(log_l_jit), float(result[0]), rtol=1e-4)
print("PASS: jit(log_likelihood_function) round-trip matches vmap scalar.")
10 changes: 8 additions & 2 deletions scripts/jax_likelihood_functions/multi/rectangular_mge.py
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Original file line number Diff line number Diff line change
Expand Up @@ -183,13 +183,19 @@
print("JAX Time Taken using VMAP:", time.time() - start)
print("JAX Time Taken per Likelihood:", (time.time() - start) / batch_size)

# The absolute pin is a GROSS-change guard only (order-of-magnitude / sign / NaN),
# hence `rtol=1e-2`: this MGE + rectangular inversion drifts ~1.8e-3 relative
# between JAX versions (measured jax 0.9.2 -> 0.10.2) — larger than the plain
# rectangular script (~2.6e-4), as the MGE basis amplifies the NNLS/linear-algebra
# reduction-order jitter. Convergence jitter, not a regression. The EXACT,
# JAX-version-robust check is the vmap == jit round-trip asserted below.
EXPECTED_VMAP_LOG_LIKELIHOOD = -6146.59211318

np.testing.assert_allclose(
np.array(result),
EXPECTED_VMAP_LOG_LIKELIHOOD,
rtol=1e-4,
err_msg="multi/rectangular_mge: JAX vmap likelihood mismatch",
rtol=1e-2,
err_msg="multi/rectangular_mge: JAX vmap likelihood gross mismatch",
)


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