Add infra pytest warnings plugin

dpnp/tests/config.py

@@ -4,3 +4,15 @@
 float16_types = bool(os.getenv("DPNP_TEST_FLOAT_16", 0))
 complex_types = bool(os.getenv("DPNP_TEST_COMPLEX_TYPES", 0))
 bool_types = bool(os.getenv("DPNP_TEST_BOOL_TYPES", 0))
+
+
+infra_warnings_enable = os.getenv("DPNP_INFRA_WARNINGS_ENABLE", "0") == "1"
+infra_warnings_directory = os.getenv("DPNP_INFRA_WARNINGS_DIRECTORY", None)
+infra_warnings_events_artifact = os.getenv(
+    "DPNP_INFRA_WARNINGS_EVENTS_ARTIFACT",
+    "dpnp_infra_warnings_events.jsonl",
+)
+infra_warnings_summary_artifact = os.getenv(
+    "DPNP_INFRA_WARNINGS_SUMMARY_ARTIFACT",
+    "dpnp_infra_warnings_summary.json",
+)

dpnp/tests/conftest.py

@@ -44,6 +44,7 @@
 import dpnp
 
 from .helper import get_dev_id
+from .infra_warning_utils import register_infra_warnings_plugin_if_enabled
 
 skip_mark = pytest.mark.skip(reason="Skipping test.")
 
@@ -114,6 +115,8 @@ def pytest_configure(config):
         "ignore:invalid value encountered in arccosh:RuntimeWarning",
     )
 
+    register_infra_warnings_plugin_if_enabled(config)
+
 
 def pytest_collection_modifyitems(config, items):
     test_path = os.path.split(__file__)[0]

dpnp/tests/infra_warning_utils.py

@@ -0,0 +1,213 @@
+import json
+import os
+import sys
+
+from collections import Counter
+
+import dpctl
+import numpy
+
+import dpnp
+from . import config as warn_config
+
+
+def _origin_from_filename(filename: str) -> str:
+    file = (filename or "").replace("\\", "/")
+    if "/dpnp/" in file or file.startswith("dpnp/"):
+        return "dpnp"
+    if "/numpy/" in file or file.startswith("numpy/"):
+        return "numpy"
+    if "/dpctl/" in file or file.startswith("dpctl/"):
+        return "dpctl"
+    return "third_party"
+
+
+def _json_dumps_one_line(obj) -> str:
+    return json.dumps(obj, separators=(",", ":"))
+
+
+class DpnpInfraWarningsPlugin:
+    """Pytest custom plugin that records pytest-captured warnings.
+
+    It only records what pytest already captures (via pytest_warning_recorded).
+    Does not change warnings filters.
+
+    Env vars:
+    - DPNP_INFRA_WARNINGS_ENABLE=1 (enables the plugin)
+    - DPNP_INFRA_WARNINGS_DIRECTORY=<dir> (writes artifacts)
+    - DPNP_INFRA_WARNINGS_EVENTS_ARTIFACT (optional filename)
+    - DPNP_INFRA_WARNINGS_SUMMARY_ARTIFACT (optional filename)
+    """
+
+    SUMMARY_BEGIN = "DPNP_WARNINGS_SUMMARY_BEGIN"
+    SUMMARY_END = "DPNP_WARNINGS_SUMMARY_END"
+    EVENT_PREFIX = "DPNP_WARNING_EVENT "
+
+    def __init__(self):
+        self.enabled = bool(warn_config.infra_warnings_enable)
+        self.directory = warn_config.infra_warnings_directory
+        self.events_artifact = warn_config.infra_warnings_events_artifact
+        self.summary_artifact = warn_config.infra_warnings_summary_artifact
+
+        self._counts = Counter()
+        self._warnings = {}
+        self._totals = Counter()
+        self._env = {}
+
+        self._events_fp = None
+        self._events_file = None
+
+    def pytest_configure(self, config):
+        if not self.enabled:
+            return
+
+        self._env.update(
+            {
+                "numpy_version": getattr(numpy, "__version__", "unknown"),
+                "numpy_path": getattr(numpy, "__file__", "unknown"),
+                "dpnp_version": getattr(dpnp, "__version__", "unknown"),
+                "dpnp_path": getattr(dpnp, "__file__", "unknown"),
+                "dpctl_version": getattr(dpctl, "__version__", "unknown"),
+                "dpctl_path": getattr(dpctl, "__file__", "unknown"),
+                "job": os.getenv("JOB_NAME", "unknown"),
+                "build_number": os.getenv("BUILD_NUMBER", "unknown"),
+                "git_sha": os.getenv("GIT_COMMIT", "unknown"),
+                "events_file": self._events_file,
+            }
+        )
+
+        if self.directory:
+            os.makedirs(self.directory, exist_ok=True)
+            self._events_file = os.path.join(self.directory, self.events_artifact)
+            self._events_fp = open(
+                self._events_file,
+                "w",
+                encoding="utf-8",
+                buffering=1,
+                newline="\n",
+            )
+
+
+    def pytest_warning_recorded(self, warning_message, when, nodeid, location):
+        if not self.enabled:
+            return
+
+        category = getattr(
+            getattr(warning_message, "category", None),
+            "__name__",
+            str(getattr(warning_message, "category", "Warning")),
+        )
+        message = str(getattr(warning_message, "message", warning_message))
+
+        filename = getattr(warning_message, "filename", None) or (
+            location[0] if location and len(location) > 0 else None
+        )
+        lineno = getattr(warning_message, "lineno", None) or (
+            location[1] if location and len(location) > 1 else None
+        )
+        func = location[2] if location and len(location) > 2 else None
+
+        origin = _origin_from_filename(filename or "")
+        key = f"{category}||{origin}||{message}"
+        self._counts[key] += 1
+        self._totals[f"category::{category}"] += 1
+        self._totals[f"origin::{origin}"] += 1
+        self._totals[f"phase::{when}"] += 1
+
+        if key not in self._warnings:
+            self._warnings[key] = {
+                "category": category,
+                "origin": origin,
+                "when": when,
+                "nodeid": nodeid,
+                "filename": filename,
+                "lineno": lineno,
+                "function": func,
+                "message": message,
+            }
+
+        event = {
+            "when": when,
+            "nodeid": nodeid,
+            "category": category,
+            "origin": origin,
+            "message": message,
+            "filename": filename,
+            "lineno": lineno,
+            "function": func,
+        }
+
+        if self._events_fp is not None:
+            try:
+                self._events_fp.write(_json_dumps_one_line(event) + "\n")
+            except Exception:
+                pass
+
+        #Write the warnings to terminal           
+        try:
+            sys.stderr.write(self.EVENT_PREFIX + _json_dumps_one_line(event) + "\n")
+            sys.stderr.flush()
+        except Exception:
+            pass
+
+    def pytest_terminal_summary(self, terminalreporter, exitstatus, config):
+        if not self.enabled:
+            return
+
+        summary = {
+            "schema_version": "1.0",
+            "exit_status": exitstatus,
+            "environment": dict(self._env),
+            "total_warning_events": int(sum(self._counts.values())),
+            "unique_warning_types": int(len(self._counts)),
+            "totals": dict(self._totals),
+            "top_unique_warnings": [
+                dict(self._warnings[k], count=c)
+                for k, c in self._counts.most_common(50)
+                if k in self._warnings
+            ],
+        }
+
+        if self.directory:
+            output_file = os.path.join(self.directory, self.summary_artifact)
+            try:
+                with open(output_file, "w", encoding="utf-8") as f:
+                    json.dump(summary, f, indent=2, sort_keys=True)
+                terminalreporter.write_line(
+                    f"DPNP infrastructure warnings summary written to: {output_file}"
+                )
+            except Exception as exc:
+                terminalreporter.write_line(
+                    f"Failed to write DPNP infrastructure warnings summary to: {output_file}. Error: {exc}"
+                )
+
+        self._close_events_fp()
+
+        terminalreporter.write_line(self.SUMMARY_BEGIN)
+        terminalreporter.write_line(_json_dumps_one_line(summary))
+        terminalreporter.write_line(self.SUMMARY_END)
+
+    def pytest_unconfigure(self, config):
+        self._close_events_fp()
+
+    def _close_events_fp(self):
+        if self._events_fp is None:
+            return
+        try:
+            self._events_fp.close()
+        except Exception:
+            pass
+        self._events_fp = None
+
+
+def register_infra_warnings_plugin_if_enabled(config) -> None:
+    """Register infra warnings plugin if enabled via env var."""
+
+    if not bool(warn_config.infra_warnings_enable):
+        return
+
+    plugin_name = "dpnp-infra-warnings"
+    if config.pluginmanager.get_plugin(plugin_name) is not None:
+        return
+
+    config.pluginmanager.register(DpnpInfraWarningsPlugin(), plugin_name)