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2024-10-21 14:27:36 +00:00
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test/utils/Base64.test.js
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const { ethers } = require('hardhat');
const { expect } = require('chai');
const { loadFixture } = require('@nomicfoundation/hardhat-network-helpers');
const Base64 = artifacts.require('$Base64');
// Replace "+/" with "-_" in the char table, and remove the padding
// see https://datatracker.ietf.org/doc/html/rfc4648#section-5
const base64toBase64Url = str => str.replaceAll('+', '-').replaceAll('/', '_').replaceAll('=', '');
contract('Strings', function () {
async function fixture() {
const mock = await ethers.deployContract('$Base64');
return { mock };
}
describe('Strings', function () {
beforeEach(async function () {
this.base64 = await Base64.new();
Object.assign(this, await loadFixture(fixture));
});
describe('from bytes - base64', function () {
it('converts to base64 encoded string with double padding', async function () {
const TEST_MESSAGE = 'test';
const input = web3.utils.asciiToHex(TEST_MESSAGE);
expect(await this.base64.$encode(input)).to.equal('dGVzdA==');
});
describe('base64', function () {
for (const { title, input, expected } of [
{ title: 'converts to base64 encoded string with double padding', input: 'test', expected: 'dGVzdA==' },
{ title: 'converts to base64 encoded string with single padding', input: 'test1', expected: 'dGVzdDE=' },
{ title: 'converts to base64 encoded string without padding', input: 'test12', expected: 'dGVzdDEy' },
{ title: 'converts to base64 encoded string (/ case)', input: 'où', expected: 'b/k=' },
{ title: 'converts to base64 encoded string (+ case)', input: 'zs~1t8', expected: 'enN+MXQ4' },
{ title: 'empty bytes', input: '', expected: '' },
])
it(title, async function () {
const buffer = Buffer.from(input, 'ascii');
expect(await this.mock.$encode(buffer)).to.equal(ethers.encodeBase64(buffer));
expect(await this.mock.$encode(buffer)).to.equal(expected);
});
});
it('converts to base64 encoded string with single padding', async function () {
const TEST_MESSAGE = 'test1';
const input = web3.utils.asciiToHex(TEST_MESSAGE);
expect(await this.base64.$encode(input)).to.equal('dGVzdDE=');
});
describe('base64url', function () {
for (const { title, input, expected } of [
{ title: 'converts to base64url encoded string with double padding', input: 'test', expected: 'dGVzdA' },
{ title: 'converts to base64url encoded string with single padding', input: 'test1', expected: 'dGVzdDE' },
{ title: 'converts to base64url encoded string without padding', input: 'test12', expected: 'dGVzdDEy' },
{ title: 'converts to base64url encoded string (_ case)', input: 'où', expected: 'b_k' },
{ title: 'converts to base64url encoded string (- case)', input: 'zs~1t8', expected: 'enN-MXQ4' },
{ title: 'empty bytes', input: '', expected: '' },
])
it(title, async function () {
const buffer = Buffer.from(input, 'ascii');
expect(await this.mock.$encodeURL(buffer)).to.equal(base64toBase64Url(ethers.encodeBase64(buffer)));
expect(await this.mock.$encodeURL(buffer)).to.equal(expected);
});
});
it('converts to base64 encoded string without padding', async function () {
const TEST_MESSAGE = 'test12';
const input = web3.utils.asciiToHex(TEST_MESSAGE);
expect(await this.base64.$encode(input)).to.equal('dGVzdDEy');
});
it('Encode reads beyond the input buffer into dirty memory', async function () {
const mock = await ethers.deployContract('Base64Dirty');
const buffer32 = ethers.id('example');
const buffer31 = buffer32.slice(0, -2);
it('empty bytes', async function () {
expect(await this.base64.$encode([])).to.equal('');
});
expect(await mock.encode(buffer31)).to.equal(ethers.encodeBase64(buffer31));
expect(await mock.encode(buffer32)).to.equal(ethers.encodeBase64(buffer32));
});
});