1 files changed, 37 insertions, 1 deletions
diff --git a/tests/unit_node/fs_test.ts b/tests/unit_node/fs_test.ts
index a241189a5..1b121c71f 100644
--- a/tests/unit_node/fs_test.ts
+++ b/tests/unit_node/fs_test.ts
@@ -15,7 +15,13 @@ import {
   statSync,
   writeFileSync,
 } from "node:fs";
-import { constants as fsPromiseConstants, cp } from "node:fs/promises";
+import {
+  constants as fsPromiseConstants,
+  cp,
+  FileHandle,
+  open,
+  writeFile,
+} from "node:fs/promises";
 import process from "node:process";
 import { pathToAbsoluteFileUrl } from "../unit/test_util.ts";
 
@@ -165,3 +171,33 @@ Deno.test(
     assertEquals(result, undefined);
   },
 );
+
+// Test for https://github.com/denoland/deno/issues/23707
+Deno.test(
+  "[node/fs/promises read] respect position argument",
+  async () => {
+    const file = mkdtempSync(join(tmpdir(), "foo-")) + "/test.bin";
+    await writeFile(file, "");
+
+    const res: number[] = [];
+    let fd: FileHandle | undefined;
+    try {
+      fd = await open(file, "r+");
+
+      for (let i = 0; i <= 5; i++) {
+        const buffer = new Uint8Array([i]);
+        await fd.write(buffer, 0, 1, i + 10);
+      }
+
+      for (let i = 10; i <= 15; i++) {
+        const buffer = new Uint8Array(1);
+        await fd.read(buffer, 0, 1, i);
+        res.push(Number(buffer.toString()));
+      }
+    } finally {
+      await fd?.close();
+    }
+
+    assertEquals(res, [0, 1, 2, 3, 4, 5]);
+  },
+);