80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
import sys
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import pathlib
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import importlib.util
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import types
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import threading
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import time
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import queue as q
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ROOT = pathlib.Path(__file__).resolve().parents[1]
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SRC = ROOT / "UnityMcpBridge" / "UnityMcpServer~" / "src"
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sys.path.insert(0, str(SRC))
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# Stub mcp.server.fastmcp to satisfy imports without the full dependency
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mcp_pkg = types.ModuleType("mcp")
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server_pkg = types.ModuleType("mcp.server")
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fastmcp_pkg = types.ModuleType("mcp.server.fastmcp")
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class _Dummy:
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pass
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fastmcp_pkg.FastMCP = _Dummy
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fastmcp_pkg.Context = _Dummy
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server_pkg.fastmcp = fastmcp_pkg
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mcp_pkg.server = server_pkg
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sys.modules.setdefault("mcp", mcp_pkg)
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sys.modules.setdefault("mcp.server", server_pkg)
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sys.modules.setdefault("mcp.server.fastmcp", fastmcp_pkg)
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def _load_module(path: pathlib.Path, name: str):
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spec = importlib.util.spec_from_file_location(name, path)
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mod = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(mod)
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return mod
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telemetry = _load_module(SRC / "telemetry.py", "telemetry_mod")
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def test_telemetry_queue_backpressure_and_single_worker(monkeypatch, caplog):
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caplog.set_level("DEBUG")
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collector = telemetry.TelemetryCollector()
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# Force-enable telemetry regardless of env settings from conftest
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collector.config.enabled = True
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# Replace queue with tiny one to trigger backpressure quickly
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small_q = q.Queue(maxsize=2)
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collector._queue = small_q
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# Make sends slow to build backlog and exercise worker
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def slow_send(self, rec):
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time.sleep(0.05)
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collector._send_telemetry = types.MethodType(slow_send, collector)
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# Fire many events quickly; record() should not block even when queue fills
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start = time.perf_counter()
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for i in range(50):
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collector.record(telemetry.RecordType.TOOL_EXECUTION, {"i": i})
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elapsed_ms = (time.perf_counter() - start) * 1000.0
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# Should be fast despite backpressure (non-blocking enqueue or drop)
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assert elapsed_ms < 80.0
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# Allow worker to process some
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time.sleep(0.3)
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# Verify drops were logged (queue full backpressure)
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dropped_logs = [m for m in caplog.messages if "Telemetry queue full; dropping" in m]
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assert len(dropped_logs) >= 1
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# Ensure only one worker thread exists and is alive
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assert collector._worker.is_alive()
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worker_threads = [t for t in threading.enumerate() if t is collector._worker]
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assert len(worker_threads) == 1
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