Stat largefile test (#3870)

* Add test for stat on a large file

* Update fs.test.ts

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

test/js/node/fs/fs.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it } from "bun:test";
+import { dirname } from "node:path";
 import { gc } from "harness";
 import fs, {
   closeSync,
@@ -31,6 +32,7 @@ import fs, {
   symlinkSync,
   writevSync,
   readvSync,
+  fstatSync,
 } from "node:fs";
 
 import _promises from "node:fs/promises";
@@ -1432,6 +1434,26 @@ describe("fs/promises", () => {
   });
 });
 
+it("stat on a large file", () => {
+  var dest: string = "",
+    fd;
+  try {
+    dest = `${tmpdir()}/fs.test.js/${Math.trunc(Math.random() * 10000000000).toString(32)}.stat.txt`;
+    mkdirSync(dirname(dest), { recursive: true });
+    const bigBuffer = new Uint8Array(1024 * 1024 * 1024);
+    fd = openSync(dest, "w");
+    let offset = 0;
+    while (offset < 5 * 1024 * 1024 * 1024) {
+      offset += writeSync(fd, bigBuffer, 0, bigBuffer.length, offset);
+    }
+
+    expect(fstatSync(fd).size).toEqual(offset);
+  } finally {
+    if (fd) closeSync(fd);
+    unlinkSync(dest);
+  }
+});
+
 it("fs.constants", () => {
   expect(constants).toBeDefined();
   expect(constants.F_OK).toBeDefined();