base64-async/test/b64.decode.js

Non-blocking chunked Base64 encoding

import test from 'ava';
import b64 from '../';
import values from './fixtures/values';

test('b64.decode is a function', t => {
	t.is(typeof b64.decode, 'function');
});

test('b64.decode returns a Promise', t => {
	const returnValue = b64.decode(values.base64);
	t.true(returnValue instanceof Promise);
});

test('b64.decode decodes Base64 to buffer', async t => {
	const result = await b64.decode(values.base64);
	t.true(Buffer.compare(result, values.buffer) === 0);
});

test('b64.decode decodes correctly in chunks', async t => {
	const result = await b64.decode(values.base64, { chunkSize: 4 });
	t.true(Buffer.compare(result, values.buffer) === 0);
});

test('b64.decode rounds chunks up to multiples of 4', async t => {
	const result = await b64.decode(values.base64, { chunkSize: 2 });
	t.true(Buffer.compare(result, values.buffer) === 0);
});

test('b64.decode rejects Promise if chunkSize is 0', async t => {
	const error = 	await t.throws(b64.decode(values.string, { chunkSize: 0 }));
	t.is(error.message, 'opts.chunkSize must be larger than 0');
});

test('b64.decode rejects Promise if input is not a string', async t => {
	const error = await t.throws(b64.decode(values.buffer));
	t.is(error.message, 'input must be a base64 string');
});