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340import {
createPacketDecoderStream,
createPacketEncoderStream,
decodePacket,
decodePayload,
encodePacket,
encodePayload,
Packet
} from "..";
import * as expect from "expect.js";
import { areArraysEqual } from "./util";
import "./node"; // replaced by "./browser" for the tests in the browser (see "browser" field in the package.json file)
describe("engine.io-parser", () => {
describe("single packet", () => {
it("should encode/decode a string", done => {
const packet: Packet = { type: "message", data: "test" };
encodePacket(packet, true, encodedPacket => {
expect(encodedPacket).to.eql("4test");
expect(decodePacket(encodedPacket)).to.eql(packet);
done();
});
});
it("should fail to decode a malformed packet", () => {
expect(decodePacket("")).to.eql({
type: "error",
data: "parser error"
});
expect(decodePacket("a123")).to.eql({
type: "error",
data: "parser error"
});
});
});
describe("payload", () => {
it("should encode/decode all packet types", done => {
const packets: Packet[] = [
{ type: "open" },
{ type: "close" },
{ type: "ping", data: "probe" },
{ type: "pong", data: "probe" },
{ type: "message", data: "test" }
];
encodePayload(packets, payload => {
expect(payload).to.eql("0\x1e1\x1e2probe\x1e3probe\x1e4test");
expect(decodePayload(payload)).to.eql(packets);
done();
});
});
it("should fail to decode a malformed payload", () => {
expect(decodePayload("{")).to.eql([
{ type: "error", data: "parser error" }
]);
expect(decodePayload("{}")).to.eql([
{ type: "error", data: "parser error" }
]);
expect(decodePayload('["a123", "a456"]')).to.eql([
{ type: "error", data: "parser error" }
]);
});
});
// note: `describe("", function() { this.skip() } );` was added in mocha@10, which has dropped support for Node.js 10
if (typeof TransformStream === "function") {
describe("createPacketEncoderStream", () => {
it("should encode a plaintext packet", async () => {
const stream = createPacketEncoderStream();
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write({
type: "message",
data: "1€"
});
const header = await reader.read();
expect(header.value).to.eql(Uint8Array.of(5));
const payload = await reader.read();
expect(payload.value).to.eql(Uint8Array.of(52, 49, 226, 130, 172));
});
it("should encode a binary packet (Uint8Array)", async () => {
const stream = createPacketEncoderStream();
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
const data = Uint8Array.of(1, 2, 3);
writer.write({
type: "message",
data
});
const header = await reader.read();
expect(header.value).to.eql(Uint8Array.of(131));
const payload = await reader.read();
expect(payload.value === data).to.be(true);
});
it("should encode a binary packet (ArrayBuffer)", async () => {
const stream = createPacketEncoderStream();
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write({
type: "message",
data: Uint8Array.of(1, 2, 3).buffer
});
const header = await reader.read();
expect(header.value).to.eql(Uint8Array.of(131));
const payload = await reader.read();
expect(payload.value).to.eql(Uint8Array.of(1, 2, 3));
});
it("should encode a binary packet (Uint16Array)", async () => {
const stream = createPacketEncoderStream();
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write({
type: "message",
data: Uint16Array.from([1, 2, 257])
});
const header = await reader.read();
expect(header.value).to.eql(Uint8Array.of(134));
const payload = await reader.read();
expect(payload.value).to.eql(Uint8Array.of(1, 0, 2, 0, 1, 1));
});
it("should encode a binary packet (Uint8Array - medium)", async () => {
const stream = createPacketEncoderStream();
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
const data = new Uint8Array(12345);
writer.write({
type: "message",
data
});
const header = await reader.read();
expect(header.value).to.eql(Uint8Array.of(254, 48, 57));
const payload = await reader.read();
expect(payload.value === data).to.be(true);
});
it("should encode a binary packet (Uint8Array - big)", async () => {
const stream = createPacketEncoderStream();
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
const data = new Uint8Array(123456789);
writer.write({
type: "message",
data
});
const header = await reader.read();
expect(header.value).to.eql(
Uint8Array.of(255, 0, 0, 0, 0, 7, 91, 205, 21)
);
const payload = await reader.read();
expect(payload.value === data).to.be(true);
});
});
describe("createPacketDecoderStream", () => {
it("should decode a plaintext packet", async () => {
const stream = createPacketDecoderStream(1e6, "arraybuffer");
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(5));
writer.write(Uint8Array.of(52, 49, 226, 130, 172));
const packet = await reader.read();
expect(packet.value).to.eql({
type: "message",
data: "1€"
});
});
it("should decode a plaintext packet (bytes by bytes)", async () => {
const stream = createPacketDecoderStream(1e6, "arraybuffer");
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(5));
writer.write(Uint8Array.of(52));
writer.write(Uint8Array.of(49));
writer.write(Uint8Array.of(226));
writer.write(Uint8Array.of(130));
writer.write(Uint8Array.of(172));
writer.write(Uint8Array.of(1));
writer.write(Uint8Array.of(50));
writer.write(Uint8Array.of(1));
writer.write(Uint8Array.of(51));
const { value } = await reader.read();
expect(value).to.eql({ type: "message", data: "1€" });
const pingPacket = await reader.read();
expect(pingPacket.value).to.eql({ type: "ping" });
const pongPacket = await reader.read();
expect(pongPacket.value).to.eql({ type: "pong" });
});
it("should decode a plaintext packet (all bytes at once)", async () => {
const stream = createPacketDecoderStream(1e6, "arraybuffer");
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(5, 52, 49, 226, 130, 172, 1, 50, 1, 51));
const { value } = await reader.read();
expect(value).to.eql({ type: "message", data: "1€" });
const pingPacket = await reader.read();
expect(pingPacket.value).to.eql({ type: "ping" });
const pongPacket = await reader.read();
expect(pongPacket.value).to.eql({ type: "pong" });
});
it("should decode a binary packet (ArrayBuffer)", async () => {
const stream = createPacketDecoderStream(1e6, "arraybuffer");
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(131, 1, 2, 3));
const { value } = await reader.read();
expect(value.type).to.eql("message");
expect(value.data).to.be.an(ArrayBuffer);
expect(areArraysEqual(value.data, Uint8Array.of(1, 2, 3)));
});
it("should decode a binary packet (ArrayBuffer) (medium)", async () => {
const stream = createPacketDecoderStream(1e6, "arraybuffer");
const payload = new Uint8Array(12345);
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(254));
writer.write(Uint8Array.of(48, 57));
writer.write(payload);
const { value } = await reader.read();
expect(value.type).to.eql("message");
expect(value.data).to.be.an(ArrayBuffer);
expect(areArraysEqual(value.data, payload));
});
it("should decode a binary packet (ArrayBuffer) (big)", async () => {
const stream = createPacketDecoderStream(1e10, "arraybuffer");
const payload = new Uint8Array(123456789);
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(255));
writer.write(Uint8Array.of(0, 0, 0, 0, 7, 91, 205, 21));
writer.write(payload);
const { value } = await reader.read();
expect(value.type).to.eql("message");
expect(value.data).to.be.an(ArrayBuffer);
expect(areArraysEqual(value.data, payload));
});
it("should return an error packet if the length of the payload is too big", async () => {
const stream = createPacketDecoderStream(10, "arraybuffer");
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(11));
const packet = await reader.read();
expect(packet.value).to.eql({ type: "error", data: "parser error" });
});
it("should return an error packet if the length of the payload is invalid", async () => {
const stream = createPacketDecoderStream(1e6, "arraybuffer");
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(0));
const packet = await reader.read();
expect(packet.value).to.eql({ type: "error", data: "parser error" });
});
it("should return an error packet if the length of the payload is bigger than Number.MAX_SAFE_INTEGER", async () => {
const stream = createPacketDecoderStream(1e6, "arraybuffer");
const writer = stream.writable.getWriter();
const reader = stream.readable.getReader();
writer.write(Uint8Array.of(255, 1, 0, 0, 0, 0, 0, 0, 0, 0));
const packet = await reader.read();
expect(packet.value).to.eql({ type: "error", data: "parser error" });
});
});
}
});