test: stabilize model warning sanitizer checks

src/logging/test-helpers/warn-log-capture.ts

@@ -0,0 +1,33 @@
+import os from "node:os";
+import path from "node:path";
+import {
+  registerLogTransport,
+  resetLogger,
+  setLoggerOverride,
+  type LogTransportRecord,
+} from "../logger.js";
+
+export function createWarnLogCapture(prefix: string) {
+  const records: LogTransportRecord[] = [];
+  setLoggerOverride({
+    level: "warn",
+    consoleLevel: "silent",
+    file: path.join(os.tmpdir(), `${prefix}-${process.pid}-${Date.now()}.log`),
+  });
+  const unregister = registerLogTransport((record) => {
+    records.push(record);
+  });
+  return {
+    findText(needle: string): string | undefined {
+      return records
+        .flatMap((record) => Object.values(record))
+        .filter((value): value is string => typeof value === "string")
+        .find((value) => value.includes(needle));
+    },
+    cleanup() {
+      unregister();
+      setLoggerOverride(null);
+      resetLogger();
+    },
+  };
+}