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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { Buffer } from "../../buffer.ts";import randomFill, { randomFillSync } from "./_randomFill.ts";import {  assertEquals,  assertNotEquals,  assertThrows,} from "../../../testing/asserts.ts";
const validateNonZero = (buf: Buffer) => {  if (!buf.some((ch) => ch > 0)) throw new Error("Error");};
const validateZero = (buf: Buffer) => {  buf.forEach((val) => assertEquals(val, 0));};
Deno.test("[node/crypto.randomFill]", () => {  const buf = Buffer.alloc(10);  const before = buf.toString("hex");
  randomFill(buf, 5, 5, (_err, bufTwo) => {    const after = bufTwo?.toString("hex");    assertEquals(before.slice(0, 10), after?.slice(0, 10));  });});
Deno.test("[node/crypto.randomFillSync]", () => {  const buf = Buffer.alloc(10);  const before = buf.toString("hex");
  const after = randomFillSync(buf, 5, 5);
  assertNotEquals(before, after.toString("hex"));});
Deno.test("[node/crypto.randomFillSync] Complete fill, explicit size", () => {  const buf = Buffer.alloc(10);  randomFillSync(buf, undefined, 10);  validateNonZero(buf);});
Deno.test("[randomFillSync] Complete fill", () => {  const buf = Buffer.alloc(10);  randomFillSync(buf);  validateNonZero(buf);});
Deno.test("[node/crypto.randomFillSync] Fill beginning, explicit offset+size", () => {  const buf = Buffer.alloc(10);  randomFillSync(buf, 0, 5);  validateNonZero(buf);
  const untouched = buf.slice(5);  assertEquals(untouched.length, 5);  validateZero(untouched);});
Deno.test("[node/crypto.randomFillSync] Invalid offst/size", () => {  assertThrows(() => randomFillSync(Buffer.alloc(10), 1, 10));});