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220import {
decodePacket,
decodePacketFromBinary,
decodePayload,
encodePacket,
encodePacketToBinary,
encodePayload,
Packet
} from "..";
import * as expect from "expect.js";
import { areArraysEqual } from "./util";
describe("engine.io-parser (node.js only)", () => {
describe("single packet", () => {
it("should encode/decode a Buffer", done => {
const packet: Packet = {
type: "message",
data: Buffer.from([1, 2, 3, 4])
};
encodePacket(packet, true, encodedPacket => {
expect(encodedPacket).to.eql(packet.data); // noop
expect(decodePacket(encodedPacket)).to.eql(packet);
done();
});
});
it("should encode/decode a Buffer as base64", done => {
const packet: Packet = {
type: "message",
data: Buffer.from([1, 2, 3, 4])
};
encodePacket(packet, false, encodedPacket => {
expect(encodedPacket).to.eql("bAQIDBA==");
expect(decodePacket(encodedPacket, "nodebuffer")).to.eql(packet);
done();
});
});
it("should encode/decode an ArrayBuffer", done => {
const packet: Packet = {
type: "message",
data: Int8Array.from([1, 2, 3, 4]).buffer
};
encodePacket(packet, true, encodedPacket => {
expect(encodedPacket === packet.data).to.be(true);
const decodedPacket = decodePacket(encodedPacket, "arraybuffer");
expect(decodedPacket.type).to.eql(packet.type);
expect(decodedPacket.data).to.be.an(ArrayBuffer);
expect(areArraysEqual(decodedPacket.data, packet.data)).to.be(true);
done();
});
});
it("should encode/decode an ArrayBuffer as base64", done => {
const packet: Packet = {
type: "message",
data: Int8Array.from([1, 2, 3, 4]).buffer
};
encodePacket(packet, false, encodedPacket => {
expect(encodedPacket).to.eql("bAQIDBA==");
const decodedPacket = decodePacket(encodedPacket, "arraybuffer");
expect(decodedPacket.type).to.eql(packet.type);
expect(decodedPacket.data).to.be.an(ArrayBuffer);
expect(areArraysEqual(decodedPacket.data, packet.data)).to.be(true);
done();
});
});
it("should encode a typed array", done => {
const packet: Packet = {
type: "message",
data: Int16Array.from([257, 258, 259, 260])
};
encodePacket(packet, true, encodedPacket => {
expect(encodedPacket === packet.data).to.be(true);
done();
});
});
it("should encode a typed array (with offset and length)", done => {
const buffer = Int8Array.from([1, 2, 3, 4]).buffer;
const data = new Int8Array(buffer, 1, 2);
encodePacket({ type: "message", data }, true, encodedPacket => {
expect(encodedPacket).to.eql(Buffer.from([2, 3]));
done();
});
});
it("should decode an ArrayBuffer as ArrayBuffer", () => {
const encodedPacket = Int8Array.from([1, 2, 3, 4]).buffer;
const decodedPacket = decodePacket(encodedPacket, "arraybuffer");
expect(decodedPacket.type).to.eql("message");
expect(decodedPacket.data).to.be.an(ArrayBuffer);
expect(areArraysEqual(decodedPacket.data, encodedPacket)).to.be(true);
});
});
describe("payload", () => {
it("should encode/decode a string + Buffer payload", done => {
const packets: Packet[] = [
{ type: "message", data: "test" },
{ type: "message", data: Buffer.from([1, 2, 3, 4]) }
];
encodePayload(packets, payload => {
expect(payload).to.eql("4test\x1ebAQIDBA==");
expect(decodePayload(payload, "nodebuffer")).to.eql(packets);
done();
});
});
});
if (typeof TextEncoder === "function") {
describe("single packet (to/from Uint8Array)", () => {
it("should encode/decode a plaintext packet", done => {
const packet: Packet = {
type: "message",
data: "1€"
};
encodePacketToBinary(packet, encodedPacket => {
expect(encodedPacket).to.be.an(Uint8Array);
expect(encodedPacket).to.eql(
Uint8Array.from([52, 49, 226, 130, 172])
);
const decoded = decodePacketFromBinary(
encodedPacket,
false,
"nodebuffer"
);
expect(decoded).to.eql(packet);
done();
});
});
it("should encode a binary packet (Buffer)", done => {
const packet: Packet = {
type: "message",
data: Buffer.from([1, 2, 3])
};
encodePacketToBinary(packet, encodedPacket => {
expect(encodedPacket === packet.data).to.be(true);
done();
});
});
it("should encode a binary packet (Uint8Array)", done => {
const packet: Packet = {
type: "message",
data: Uint8Array.from([1, 2, 3])
};
encodePacketToBinary(packet, encodedPacket => {
expect(encodedPacket === packet.data).to.be(true);
done();
});
});
it("should encode a binary packet (ArrayBuffer)", done => {
const packet: Packet = {
type: "message",
data: Uint8Array.from([1, 2, 3]).buffer
};
encodePacketToBinary(packet, encodedPacket => {
expect(Buffer.isBuffer(encodedPacket)).to.be(true);
expect(encodedPacket).to.eql(Buffer.from([1, 2, 3]));
done();
});
});
it("should encode a binary packet (Uint16Array)", done => {
const packet: Packet = {
type: "message",
data: Uint16Array.from([1, 2, 257])
};
encodePacketToBinary(packet, encodedPacket => {
expect(Buffer.isBuffer(encodedPacket)).to.be(true);
expect(encodedPacket).to.eql(Buffer.from([1, 0, 2, 0, 1, 1]));
done();
});
});
it("should decode a binary packet (Buffer)", () => {
const decoded = decodePacketFromBinary(
Uint8Array.from([1, 2, 3]),
false,
"nodebuffer"
);
expect(decoded.type).to.eql("message");
expect(Buffer.isBuffer(decoded.data)).to.be(true);
expect(decoded.data).to.eql(Buffer.from([1, 2, 3]));
});
it("should decode a binary packet (ArrayBuffer)", () => {
const decoded = decodePacketFromBinary(
Uint8Array.from([1, 2, 3]),
false,
"arraybuffer"
);
expect(decoded.type).to.eql("message");
expect(decoded.data).to.be.an(ArrayBuffer);
expect(areArraysEqual(decoded.data, Uint8Array.from([1, 2, 3])));
});
it("should decode a binary packet (with binary header)", () => {
// 52 === "4".charCodeAt(0)
const decoded = decodePacketFromBinary(
Uint8Array.from([52]),
true,
"nodebuffer"
);
expect(decoded.type).to.eql("message");
expect(Buffer.isBuffer(decoded.data)).to.be(true);
expect(decoded.data).to.eql(Buffer.from([52]));
});
});
}
});