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_randomFill_test.ts
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_randomFill_test.ts
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// Copyright 2018-2023 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));
});