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77 lines
2.4 KiB
JavaScript
77 lines
2.4 KiB
JavaScript
/*
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* Copyright 2002-2024 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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"use strict";
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import { expect } from "chai";
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import base64url from "../lib/base64url.js";
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describe("base64url", () => {
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before(() => {
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// Emulate the atob / btoa base64 encoding/decoding from the browser
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global.window = {
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btoa: (str) => Buffer.from(str, "binary").toString("base64"),
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atob: (b64) => Buffer.from(b64, "base64").toString("binary"),
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};
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});
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after(() => {
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// Reset window object
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global.window = {};
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});
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it("decodes", () => {
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// "Zm9vYmFy" is "foobar" in base 64, i.e. f:102 o:111 o:111 b:98 a:97 r:114
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const decoded = base64url.decode("Zm9vYmFy");
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expect(new Uint8Array(decoded)).to.be.deep.equal(new Uint8Array([102, 111, 111, 98, 97, 114]));
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});
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it("decodes special characters", () => {
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// Wrap the decode function for easy testing
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const decode = (str) => {
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const decoded = new Uint8Array(base64url.decode(str));
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return Array.from(decoded);
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};
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// "Pz8/" is "???" in base64, i.e. ?:63 three times
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expect(decode("Pz8/")).to.be.deep.equal(decode("Pz8_"));
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expect(decode("Pz8_")).to.be.deep.equal([63, 63, 63]);
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// "Pj4+" is ">>>" in base64, ie >:62 three times
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expect(decode("Pj4+")).to.be.deep.equal(decode("Pj4-"));
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expect(decode("Pj4-")).to.be.deep.equal([62, 62, 62]);
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});
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it("encodes", () => {
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const encoded = base64url.encode(Buffer.from("foobar"));
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expect(encoded).to.be.equal("Zm9vYmFy");
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});
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it("encodes special +/ characters", () => {
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const encode = (str) => base64url.encode(Buffer.from(str));
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expect(encode("???")).to.be.equal("Pz8_");
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expect(encode(">>>")).to.be.equal("Pj4-");
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});
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it("is stable", () => {
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const base = "tyRDnKxdj7uWOT5jrchXu54lo6nf3bWOUvMQnGOXk7g";
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expect(base64url.encode(base64url.decode(base))).to.be.equal(base);
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});
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});
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