teletexthash/test/decode.js

edit-tf compatible teletext has encoder and decoder library

const { decode } = require('..');
const assert = require('assert');
const teletextPageBuffer1 = new Uint8Array(25 * 40).fill(0x20);
const teletextPageBuffer2 = new Uint8Array(25 * 40).map(
	(char, index) => (index % 2 === 0 ? 0x61 : 0x20)
);
const teletextPageBuffer3 = new Uint8Array(25 * 40).map(
	(char, index) => ((index + 2) % 6 === 0 ? 0x78 : 0x20)
);

const teletextPageHash1 =
	'#0:QIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECBAgQIECA';
const teletextPageHash2 =
	'#1:woMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKDCgwoMKA';
const teletextPageHash3 =
	'#0:QIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECDwgQIECA'
describe('decode', function() {
	it('should return the correct buffer', function() {
		assert.deepEqual(
			decode(teletextPageHash1).teletextBuffer,
			teletextPageBuffer1
		);
	});

	it('should return the correct buffer', function() {
		assert.deepEqual(
			decode(teletextPageHash2).teletextBuffer,
			teletextPageBuffer2
		);
	});

	it('should return the correct buffer', function() {
		assert.deepEqual(
			decode(teletextPageHash3).teletextBuffer,
			teletextPageBuffer3
		);
	});
});