Add a test for infinite looping when readClosest cannot find a file in node.js

Author: brettimus

packages/autometrics/tests/platform.node.test.ts

@@ -0,0 +1,16 @@
+import { assertThrows } from "$std/assert/mod.ts";
+import { readClosest } from "../src/platform.node.ts";
+
+Deno.test("Node.js platform tests", async (t) => {
+  // NOTE: Added this test as a quick way to cover the fix from #149 - fix an infinite loop which happens when autometrics is initialized in a node service without a git repository
+  await t.step(
+    "readClosest does not loop infinitely on nonexistent file",
+    () => {
+      assertThrows(
+        () => readClosest("nonexistent.file"),
+        Error,
+        "Could not read nonexistent.file",
+      );
+    },
+  );
+});