From 32aa2cadc4c81b9dd73973bfccae5cc9d1d00e9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Robert?= <cr52@protonmail.com>
Date: Sun, 31 May 2026 17:22:55 +0200
Subject: [PATCH] TST: add a custom pytest session header to make runtime state
 (free-threading, JIT) visible

---
 bottleneck/conftest.py | 16 ++++++++++++++++
 pyproject.toml         |  1 +
 uv.lock                | 17 ++++++++++++++++-
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/bottleneck/conftest.py b/bottleneck/conftest.py
index 4c38f25f4..52582a3ea 100644
--- a/bottleneck/conftest.py
+++ b/bottleneck/conftest.py
@@ -1,8 +1,10 @@
+import textwrap
 from importlib.util import find_spec
 
 import pytest
 
 HAS_PYTEST_PARALLEL_RUN = find_spec("pytest_run_parallel") is not None
+HAS_RUNTIME_INTROSPECT = find_spec("runtime_introspect") is not None
 
 
 def pytest_configure(config):
@@ -29,3 +31,17 @@ def pytest_configure(config):
     @pytest.fixture
     def num_parallel_threads():
         return 1
+
+
+def pytest_report_header(config, start_path) -> list[str]:
+    if not HAS_RUNTIME_INTROSPECT:
+        return
+
+    from runtime_introspect import runtime_feature_set
+
+    fs = runtime_feature_set()
+    diagnostics = fs.diagnostics(features=["free-threading", "JIT"])
+    return [
+        "Runtime optional features state (snapshot):",
+        textwrap.indent("\n".join(diagnostics), "  "),
+    ]
diff --git a/pyproject.toml b/pyproject.toml
index 52cc72efe..d16bcd93e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,6 +68,7 @@ doc = [
 ]
 test = [
     "pytest>=8.0.0",
+    "runtime-introspect>=0.4.1",
 ]
 concurrency = [
     { include-group = "test" },
diff --git a/uv.lock b/uv.lock
index 1726a9668..39bab6632 100644
--- a/uv.lock
+++ b/uv.lock
@@ -37,6 +37,7 @@ dependencies = [
 concurrency = [
     { name = "pytest" },
     { name = "pytest-run-parallel" },
+    { name = "runtime-introspect" },
 ]
 doc = [
     { name = "gitpython" },
@@ -47,6 +48,7 @@ doc = [
 ]
 test = [
     { name = "pytest" },
+    { name = "runtime-introspect" },
 ]
 
 [package.metadata]
@@ -56,13 +58,17 @@ requires-dist = [{ name = "numpy", specifier = ">=1.21.3" }]
 concurrency = [
     { name = "pytest", specifier = ">=8.0.0" },
     { name = "pytest-run-parallel", specifier = ">=0.9.0" },
+    { name = "runtime-introspect", specifier = ">=0.4.1" },
 ]
 doc = [
     { name = "gitpython" },
     { name = "numpydoc" },
     { name = "sphinx" },
 ]
-test = [{ name = "pytest", specifier = ">=8.0.0" }]
+test = [
+    { name = "pytest", specifier = ">=8.0.0" },
+    { name = "runtime-introspect", specifier = ">=0.4.1" },
+]
 
 [[package]]
 name = "certifi"
@@ -600,6 +606,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/04/54/6f679c435d28e0a568d8e8a7c0a93a09010818634c3c3907fc98d8983770/roman_numerals-4.1.0-py3-none-any.whl", hash = "sha256:647ba99caddc2cc1e55a51e4360689115551bf4476d90e8162cf8c345fe233c7", size = 7676, upload-time = "2025-12-17T18:25:33.098Z" },
 ]
 
+[[package]]
+name = "runtime-introspect"
+version = "0.4.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/77/b9/d4feffda2f30e904b44d00cfc186227923108c7c74b51d7cc74dca746022/runtime_introspect-0.4.1.tar.gz", hash = "sha256:e1c6932c4021d432c81ed577424af20e4cb1e20eed93d45b2950cf8be2da9b45", size = 24458, upload-time = "2026-05-19T07:37:37.018Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/e4/8d/eae181160558368a946f185a7d422f448433617d90af74cf899f5d0be2f5/runtime_introspect-0.4.1-py3-none-any.whl", hash = "sha256:22b3703ef9f0f3e5207339b549b2d785505cb6511d7f090eb2fa268589c7f0f0", size = 20762, upload-time = "2026-05-19T07:37:35.605Z" },
+]
+
 [[package]]
 name = "smmap"
 version = "5.0.2"