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ae2e1ff7bd
This frees us from manual imports, and makes things less magical as those aren't ES modules even if the code suggest that the are.
442 lines
17 KiB
JavaScript
442 lines
17 KiB
JavaScript
const expect = chai.expect;
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import Websock from '../core/websock.js';
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import FakeWebSocket from './fake.websocket.js';
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describe('Websock', function() {
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"use strict";
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describe('Queue methods', function () {
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let sock;
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const RQ_TEMPLATE = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7]);
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beforeEach(function () {
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sock = new Websock();
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// skip init
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sock._allocate_buffers();
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sock._rQ.set(RQ_TEMPLATE);
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sock._rQlen = RQ_TEMPLATE.length;
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});
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describe('rQlen', function () {
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it('should return the length of the receive queue', function () {
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sock.set_rQi(0);
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expect(sock.rQlen()).to.equal(RQ_TEMPLATE.length);
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});
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it("should return the proper length if we read some from the receive queue", function () {
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sock.set_rQi(1);
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expect(sock.rQlen()).to.equal(RQ_TEMPLATE.length - 1);
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});
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});
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describe('rQpeek8', function () {
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it('should peek at the next byte without poping it off the queue', function () {
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const bef_len = sock.rQlen();
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const peek = sock.rQpeek8();
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expect(sock.rQpeek8()).to.equal(peek);
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expect(sock.rQlen()).to.equal(bef_len);
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});
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});
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describe('rQshift8', function () {
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it('should pop a single byte from the receive queue', function () {
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const peek = sock.rQpeek8();
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const bef_len = sock.rQlen();
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expect(sock.rQshift8()).to.equal(peek);
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expect(sock.rQlen()).to.equal(bef_len - 1);
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});
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});
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describe('rQshift16', function () {
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it('should pop two bytes from the receive queue and return a single number', function () {
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const bef_len = sock.rQlen();
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const expected = (RQ_TEMPLATE[0] << 8) + RQ_TEMPLATE[1];
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expect(sock.rQshift16()).to.equal(expected);
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expect(sock.rQlen()).to.equal(bef_len - 2);
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});
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});
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describe('rQshift32', function () {
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it('should pop four bytes from the receive queue and return a single number', function () {
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const bef_len = sock.rQlen();
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const expected = (RQ_TEMPLATE[0] << 24) +
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(RQ_TEMPLATE[1] << 16) +
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(RQ_TEMPLATE[2] << 8) +
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RQ_TEMPLATE[3];
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expect(sock.rQshift32()).to.equal(expected);
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expect(sock.rQlen()).to.equal(bef_len - 4);
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});
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});
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describe('rQshiftStr', function () {
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it('should shift the given number of bytes off of the receive queue and return a string', function () {
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const bef_len = sock.rQlen();
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const bef_rQi = sock.get_rQi();
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const shifted = sock.rQshiftStr(3);
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expect(shifted).to.be.a('string');
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expect(shifted).to.equal(String.fromCharCode.apply(null, Array.prototype.slice.call(new Uint8Array(RQ_TEMPLATE.buffer, bef_rQi, 3))));
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expect(sock.rQlen()).to.equal(bef_len - 3);
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});
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it('should shift the entire rest of the queue off if no length is given', function () {
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sock.rQshiftStr();
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expect(sock.rQlen()).to.equal(0);
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});
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it('should be able to handle very large strings', function () {
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const BIG_LEN = 500000;
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const RQ_BIG = new Uint8Array(BIG_LEN);
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let expected = "";
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let letterCode = 'a'.charCodeAt(0);
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for (let i = 0; i < BIG_LEN; i++) {
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RQ_BIG[i] = letterCode;
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expected += String.fromCharCode(letterCode);
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if (letterCode < 'z'.charCodeAt(0)) {
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letterCode++;
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} else {
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letterCode = 'a'.charCodeAt(0);
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}
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}
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sock._rQ.set(RQ_BIG);
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sock._rQlen = RQ_BIG.length;
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const shifted = sock.rQshiftStr();
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expect(shifted).to.be.equal(expected);
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expect(sock.rQlen()).to.equal(0);
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});
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});
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describe('rQshiftBytes', function () {
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it('should shift the given number of bytes of the receive queue and return an array', function () {
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const bef_len = sock.rQlen();
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const bef_rQi = sock.get_rQi();
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const shifted = sock.rQshiftBytes(3);
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expect(shifted).to.be.an.instanceof(Uint8Array);
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expect(shifted).to.array.equal(new Uint8Array(RQ_TEMPLATE.buffer, bef_rQi, 3));
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expect(sock.rQlen()).to.equal(bef_len - 3);
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});
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it('should shift the entire rest of the queue off if no length is given', function () {
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sock.rQshiftBytes();
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expect(sock.rQlen()).to.equal(0);
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});
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});
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describe('rQslice', function () {
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beforeEach(function () {
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sock.set_rQi(0);
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});
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it('should not modify the receive queue', function () {
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const bef_len = sock.rQlen();
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sock.rQslice(0, 2);
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expect(sock.rQlen()).to.equal(bef_len);
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});
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it('should return an array containing the given slice of the receive queue', function () {
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const sl = sock.rQslice(0, 2);
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expect(sl).to.be.an.instanceof(Uint8Array);
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expect(sl).to.array.equal(new Uint8Array(RQ_TEMPLATE.buffer, 0, 2));
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});
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it('should use the rest of the receive queue if no end is given', function () {
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const sl = sock.rQslice(1);
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expect(sl).to.have.length(RQ_TEMPLATE.length - 1);
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expect(sl).to.array.equal(new Uint8Array(RQ_TEMPLATE.buffer, 1));
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});
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it('should take the current rQi in to account', function () {
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sock.set_rQi(1);
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expect(sock.rQslice(0, 2)).to.array.equal(new Uint8Array(RQ_TEMPLATE.buffer, 1, 2));
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});
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});
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describe('rQwait', function () {
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beforeEach(function () {
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sock.set_rQi(0);
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});
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it('should return true if there are not enough bytes in the receive queue', function () {
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expect(sock.rQwait('hi', RQ_TEMPLATE.length + 1)).to.be.true;
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});
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it('should return false if there are enough bytes in the receive queue', function () {
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expect(sock.rQwait('hi', RQ_TEMPLATE.length)).to.be.false;
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});
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it('should return true and reduce rQi by "goback" if there are not enough bytes', function () {
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sock.set_rQi(5);
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expect(sock.rQwait('hi', RQ_TEMPLATE.length, 4)).to.be.true;
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expect(sock.get_rQi()).to.equal(1);
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});
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it('should raise an error if we try to go back more than possible', function () {
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sock.set_rQi(5);
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expect(() => sock.rQwait('hi', RQ_TEMPLATE.length, 6)).to.throw(Error);
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});
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it('should not reduce rQi if there are enough bytes', function () {
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sock.set_rQi(5);
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sock.rQwait('hi', 1, 6);
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expect(sock.get_rQi()).to.equal(5);
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});
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});
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describe('flush', function () {
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beforeEach(function () {
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sock._websocket = {
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send: sinon.spy()
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};
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});
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it('should actually send on the websocket', function () {
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sock._websocket.bufferedAmount = 8;
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sock._websocket.readyState = WebSocket.OPEN
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sock._sQ = new Uint8Array([1, 2, 3]);
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sock._sQlen = 3;
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const encoded = sock._encode_message();
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sock.flush();
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expect(sock._websocket.send).to.have.been.calledOnce;
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expect(sock._websocket.send).to.have.been.calledWith(encoded);
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});
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it('should not call send if we do not have anything queued up', function () {
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sock._sQlen = 0;
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sock._websocket.bufferedAmount = 8;
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sock.flush();
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expect(sock._websocket.send).not.to.have.been.called;
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});
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});
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describe('send', function () {
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beforeEach(function () {
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sock.flush = sinon.spy();
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});
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it('should add to the send queue', function () {
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sock.send([1, 2, 3]);
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const sq = sock.get_sQ();
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expect(new Uint8Array(sq.buffer, sock._sQlen - 3, 3)).to.array.equal(new Uint8Array([1, 2, 3]));
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});
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it('should call flush', function () {
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sock.send([1, 2, 3]);
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expect(sock.flush).to.have.been.calledOnce;
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});
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});
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describe('send_string', function () {
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beforeEach(function () {
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sock.send = sinon.spy();
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});
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it('should call send after converting the string to an array', function () {
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sock.send_string("\x01\x02\x03");
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expect(sock.send).to.have.been.calledWith([1, 2, 3]);
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});
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});
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});
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describe('lifecycle methods', function () {
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let old_WS;
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before(function () {
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old_WS = WebSocket;
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});
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let sock;
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beforeEach(function () {
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sock = new Websock();
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// eslint-disable-next-line no-global-assign
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WebSocket = sinon.spy();
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WebSocket.OPEN = old_WS.OPEN;
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WebSocket.CONNECTING = old_WS.CONNECTING;
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WebSocket.CLOSING = old_WS.CLOSING;
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WebSocket.CLOSED = old_WS.CLOSED;
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WebSocket.prototype.binaryType = 'arraybuffer';
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});
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describe('opening', function () {
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it('should pick the correct protocols if none are given' , function () {
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});
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it('should open the actual websocket', function () {
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sock.open('ws://localhost:8675', 'binary');
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expect(WebSocket).to.have.been.calledWith('ws://localhost:8675', 'binary');
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});
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// it('should initialize the event handlers')?
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});
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describe('closing', function () {
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beforeEach(function () {
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sock.open('ws://');
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sock._websocket.close = sinon.spy();
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});
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it('should close the actual websocket if it is open', function () {
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sock._websocket.readyState = WebSocket.OPEN;
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sock.close();
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expect(sock._websocket.close).to.have.been.calledOnce;
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});
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it('should close the actual websocket if it is connecting', function () {
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sock._websocket.readyState = WebSocket.CONNECTING;
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sock.close();
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expect(sock._websocket.close).to.have.been.calledOnce;
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});
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it('should not try to close the actual websocket if closing', function () {
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sock._websocket.readyState = WebSocket.CLOSING;
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sock.close();
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expect(sock._websocket.close).not.to.have.been.called;
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});
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it('should not try to close the actual websocket if closed', function () {
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sock._websocket.readyState = WebSocket.CLOSED;
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sock.close();
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expect(sock._websocket.close).not.to.have.been.called;
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});
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it('should reset onmessage to not call _recv_message', function () {
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sinon.spy(sock, '_recv_message');
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sock.close();
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sock._websocket.onmessage(null);
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try {
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expect(sock._recv_message).not.to.have.been.called;
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} finally {
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sock._recv_message.restore();
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}
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});
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});
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describe('event handlers', function () {
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beforeEach(function () {
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sock._recv_message = sinon.spy();
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sock.on('open', sinon.spy());
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sock.on('close', sinon.spy());
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sock.on('error', sinon.spy());
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sock.open('ws://');
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});
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it('should call _recv_message on a message', function () {
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sock._websocket.onmessage(null);
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expect(sock._recv_message).to.have.been.calledOnce;
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});
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it('should call the open event handler on opening', function () {
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sock._websocket.onopen();
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expect(sock._eventHandlers.open).to.have.been.calledOnce;
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});
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it('should call the close event handler on closing', function () {
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sock._websocket.onclose();
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expect(sock._eventHandlers.close).to.have.been.calledOnce;
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});
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it('should call the error event handler on error', function () {
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sock._websocket.onerror();
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expect(sock._eventHandlers.error).to.have.been.calledOnce;
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});
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});
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after(function () {
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// eslint-disable-next-line no-global-assign
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WebSocket = old_WS;
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});
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});
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describe('WebSocket Receiving', function () {
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let sock;
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beforeEach(function () {
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sock = new Websock();
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sock._allocate_buffers();
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});
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it('should support adding binary Uint8Array data to the receive queue', function () {
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const msg = { data: new Uint8Array([1, 2, 3]) };
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sock._mode = 'binary';
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sock._recv_message(msg);
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expect(sock.rQshiftStr(3)).to.equal('\x01\x02\x03');
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});
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it('should call the message event handler if present', function () {
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sock._eventHandlers.message = sinon.spy();
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const msg = { data: new Uint8Array([1, 2, 3]).buffer };
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sock._mode = 'binary';
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sock._recv_message(msg);
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expect(sock._eventHandlers.message).to.have.been.calledOnce;
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});
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it('should not call the message event handler if there is nothing in the receive queue', function () {
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sock._eventHandlers.message = sinon.spy();
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const msg = { data: new Uint8Array([]).buffer };
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sock._mode = 'binary';
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sock._recv_message(msg);
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expect(sock._eventHandlers.message).not.to.have.been.called;
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});
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it('should compact the receive queue', function () {
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// NB(sross): while this is an internal implementation detail, it's important to
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// test, otherwise the receive queue could become very large very quickly
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sock._rQ = new Uint8Array([0, 1, 2, 3, 4, 5, 0, 0, 0, 0]);
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sock._rQlen = 6;
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sock.set_rQi(6);
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sock._rQmax = 3;
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const msg = { data: new Uint8Array([1, 2, 3]).buffer };
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sock._mode = 'binary';
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sock._recv_message(msg);
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expect(sock._rQlen).to.equal(3);
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expect(sock.get_rQi()).to.equal(0);
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});
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it('should automatically resize the receive queue if the incoming message is too large', function () {
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sock._rQ = new Uint8Array(20);
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sock._rQlen = 0;
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sock.set_rQi(0);
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sock._rQbufferSize = 20;
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sock._rQmax = 2;
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const msg = { data: new Uint8Array(30).buffer };
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sock._mode = 'binary';
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sock._recv_message(msg);
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expect(sock._rQlen).to.equal(30);
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expect(sock.get_rQi()).to.equal(0);
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expect(sock._rQ.length).to.equal(240); // keep the invariant that rQbufferSize / 8 >= rQlen
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});
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});
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describe('Data encoding', function () {
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before(function () { FakeWebSocket.replace(); });
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after(function () { FakeWebSocket.restore(); });
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describe('as binary data', function () {
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let sock;
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beforeEach(function () {
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sock = new Websock();
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sock.open('ws://', 'binary');
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sock._websocket._open();
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});
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it('should only send the send queue up to the send queue length', function () {
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sock._sQ = new Uint8Array([1, 2, 3, 4, 5]);
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sock._sQlen = 3;
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const res = sock._encode_message();
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expect(res).to.array.equal(new Uint8Array([1, 2, 3]));
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});
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it('should properly pass the encoded data off to the actual WebSocket', function () {
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sock.send([1, 2, 3]);
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expect(sock._websocket._get_sent_data()).to.array.equal(new Uint8Array([1, 2, 3]));
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});
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});
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});
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});
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