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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { writeBuffer } from "./node_file.ts";import { assertEquals } from "../../testing/asserts.ts";import { isWindows } from "../../_util/os.ts";
Deno.test("[node/internal_binding/node_file] writeBuffer", async () => {  const tempfile = await Deno.makeTempFile();  await Deno.writeTextFile(tempfile, "01234567890123456789");
  const file = await Deno.open(tempfile, { write: true });  await Deno.seek(file.rid, 5, Deno.SeekMode.Start);
  try {    const ctx: { errno?: number } = {};    const bytesWritten = writeBuffer(      file.rid,      new Uint8Array([65, 66, 67, 68, 69] /* abcde */),      1,      3,      5,      ctx,    );
    assertEquals(await Deno.readTextFile(tempfile), "0123456789BCD3456789");    assertEquals(bytesWritten, 3);    assertEquals(typeof ctx.errno, "undefined");  } finally {    Deno.close(file.rid);    await Deno.remove(tempfile);  }});Deno.test("[node/internal_binding/node_file] writeBuffer", async () => {  const tempfile = await Deno.makeTempFile();  await Deno.writeTextFile(tempfile, "01234567890123456789");  const file = await Deno.open(tempfile, { read: true, write: false });
  try {    const ctx: { errno?: number } = {};    const bytesWritten = writeBuffer(      file.rid,      new Uint8Array([65, 66, 67, 68, 69] /* abcde */),      1,      3,      5,      ctx,    );    assertEquals(bytesWritten, 0);    if (isWindows) {      assertEquals(ctx.errno, 5); // Access is denied    } else {      assertEquals(ctx.errno, 9); // Bad file descriptor    }  } finally {    Deno.close(file.rid);    await Deno.remove(tempfile);  }});