test: Move batcher fork safety test to batcher tests (#6225)

Just moving one test case to another file.

Author: sentrivana

tests/tracing/test_span_batcher.py

@@ -1,6 +1,10 @@
+import os
+import sys
 import time
 from unittest import mock
 
+import pytest
+
 import sentry_sdk
 from sentry_sdk._span_batcher import SpanBatcher
 
@@ -425,3 +429,67 @@ def test_transport_format(sentry_init, capture_envelopes):
         assert "value" in value
         assert "type" in value
         assert value["type"] in ("string", "boolean", "integer", "double", "array")
+
+
+@pytest.mark.skipif(
+    sys.platform == "win32"
+    or not hasattr(os, "fork")
+    or not hasattr(os, "register_at_fork"),
+    reason="requires POSIX fork and os.register_at_fork (Python 3.7+)",
+)
+def test_span_batcher_lock_reset_in_child_after_fork(sentry_init):
+    """Regression test for the SpanBatcher fork-deadlock fix.
+
+    If os.fork() runs while another thread holds SpanBatcher._lock, the
+    child inherits the lock locked. The holding thread does not exist in
+    the child, so the lock can never be released and _ensure_thread
+    deadlocks forever. The after-fork hook must replace the lock with a
+    fresh one in the child and reset
+    _flusher / _flusher_pid / _span_buffer / _running_size / _active /
+    _flush_event.
+    """
+    sentry_init(
+        traces_sample_rate=1.0,
+        _experiments={"trace_lifecycle": "stream"},
+    )
+    batcher = sentry_sdk.get_client().span_batcher
+    assert batcher is not None
+
+    original_lock = batcher._lock
+    original_lock.acquire()
+
+    batcher._span_buffer["test-trace-id"].append(object())
+    batcher._running_size["test-trace-id"] = 42
+    batcher._active.flag = True
+    batcher._flush_event.set()
+    batcher._running = False
+
+    pid = os.fork()
+    if pid == 0:
+        replaced = batcher._lock is not original_lock
+        unheld = batcher._lock.acquire(blocking=False)
+
+        flusher_reset = batcher._flusher is None and batcher._flusher_pid is None
+        span_buffer_reset = len(batcher._span_buffer) == 0
+        running_size_reset = len(batcher._running_size) == 0
+
+        active_reset = not getattr(batcher._active, "flag", False)
+        event_reset = not batcher._flush_event.is_set()
+        running_reset = batcher._running is True
+
+        os._exit(
+            0
+            if replaced
+            and unheld
+            and flusher_reset
+            and span_buffer_reset
+            and running_size_reset
+            and active_reset
+            and event_reset
+            and running_reset
+            else 1
+        )
+
+    original_lock.release()
+    _, status = os.waitpid(pid, 0)
+    assert os.WIFEXITED(status) and os.WEXITSTATUS(status) == 0

tests/tracing/test_span_streaming.py

@@ -1,5 +1,4 @@
 import asyncio
-import os
 import re
 import sys
 import time
@@ -1520,67 +1519,3 @@ def test_default_attributes(sentry_init, capture_envelopes):
         "sentry.release": {"value": "1.0.0", "type": "string"},
         "sentry.origin": {"value": "manual", "type": "string"},
     }
-
-
-@pytest.mark.skipif(
-    sys.platform == "win32"
-    or not hasattr(os, "fork")
-    or not hasattr(os, "register_at_fork"),
-    reason="requires POSIX fork and os.register_at_fork (Python 3.7+)",
-)
-def test_span_batcher_lock_reset_in_child_after_fork(sentry_init):
-    """Regression test for the SpanBatcher fork-deadlock fix.
-
-    If os.fork() runs while another thread holds SpanBatcher._lock, the
-    child inherits the lock locked. The holding thread does not exist in
-    the child, so the lock can never be released and _ensure_thread
-    deadlocks forever. The after-fork hook must replace the lock with a
-    fresh one in the child and reset
-    _flusher / _flusher_pid / _span_buffer / _running_size / _active /
-    _flush_event.
-    """
-    sentry_init(
-        traces_sample_rate=1.0,
-        _experiments={"trace_lifecycle": "stream"},
-    )
-    batcher = sentry_sdk.get_client().span_batcher
-    assert batcher is not None
-
-    original_lock = batcher._lock
-    original_lock.acquire()
-
-    batcher._span_buffer["test-trace-id"].append(object())
-    batcher._running_size["test-trace-id"] = 42
-    batcher._active.flag = True
-    batcher._flush_event.set()
-    batcher._running = False
-
-    pid = os.fork()
-    if pid == 0:
-        replaced = batcher._lock is not original_lock
-        unheld = batcher._lock.acquire(blocking=False)
-
-        flusher_reset = batcher._flusher is None and batcher._flusher_pid is None
-        span_buffer_reset = len(batcher._span_buffer) == 0
-        running_size_reset = len(batcher._running_size) == 0
-
-        active_reset = not getattr(batcher._active, "flag", False)
-        event_reset = not batcher._flush_event.is_set()
-        running_reset = batcher._running is True
-
-        os._exit(
-            0
-            if replaced
-            and unheld
-            and flusher_reset
-            and span_buffer_reset
-            and running_size_reset
-            and active_reset
-            and event_reset
-            and running_reset
-            else 1
-        )
-
-    original_lock.release()
-    _, status = os.waitpid(pid, 0)
-    assert os.WIFEXITED(status) and os.WEXITSTATUS(status) == 0