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ElkDiscoveryClient.test.ts
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ElkDiscoveryClient.test.ts
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import ElkDiscoveryClient, { C1M1_DISCOVERY_ID, M1XEP_DISCOVERY_ID } from './ElkDiscoveryClient';
import ElkDeviceType from './ElkDeviceType';
import { DEFAULT_DISCOVERY_OPTIONS } from './ElkDiscoveryOptions';
jest.mock('dgram');
// prettier-ignore
const C1M1_MSG = Buffer.from([
67, 49, 77, 49, 32, // ID
0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, // MAC
192, 168, 1, 100, // IP
8, 53, // port
22, 33, // secure port
67, 49, 77, 49, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
]);
// prettier-ignore
const M1XEP_MSG = Buffer.from([
77, 49, 88 , 69, 80, // ID
0x12, 0x34, 0x56, 0xab, 0xcd, 0xef, // MAC
10, 10, 1, 202, // IP
3, 9, // port
73, 32, 97, 109, 32, 97, 110, 32, 77, 49, 88, 69, 80, 33, 32, 32, // name
0, 0, 0, 0, 0, 0, 0, 0, 0, // unused
]);
describe('ElkDiscoveryClient', () => {
let client: ElkDiscoveryClient;
let dgramMockInstance: any;
beforeEach(() => {
jest.useFakeTimers();
dgramMockInstance = require('dgram').__mockInstance;
});
afterEach(() => {
require('dgram').__resetMockInstance();
});
describe('with defaults', () => {
beforeEach(() => {
client = new ElkDiscoveryClient();
});
it('resolves after default timeout', async () => {
expect.assertions(1);
const result = client.start();
jest.advanceTimersByTime(5000);
const devices = await result;
expect(devices.length).toBe(0);
});
it('requests all device types', async () => {
expect.assertions(3);
const sendMock = jest.fn();
dgramMockInstance.send = sendMock;
const result = client.start();
jest.advanceTimersByTime(5000);
const devices = await result;
expect(sendMock.mock.calls.length).toBe(2);
expect(sendMock).toBeCalledWith(
C1M1_DISCOVERY_ID,
0,
C1M1_DISCOVERY_ID.length,
DEFAULT_DISCOVERY_OPTIONS.port,
DEFAULT_DISCOVERY_OPTIONS.broadcastAddress
);
expect(sendMock).toBeCalledWith(
M1XEP_DISCOVERY_ID,
0,
M1XEP_DISCOVERY_ID.length,
DEFAULT_DISCOVERY_OPTIONS.port,
DEFAULT_DISCOVERY_OPTIONS.broadcastAddress
);
});
it('reports devices', async () => {
expect.assertions(2);
const result = client.start();
dgramMockInstance.emit('message', C1M1_MSG);
dgramMockInstance.emit('message', M1XEP_MSG);
jest.advanceTimersByTime(5000);
const devices = await result;
// expect(devices.length).toBe(2);
expect(devices).toContainEqual({
deviceType: ElkDeviceType.M1XEP,
macAddress: '12:34:56:ab:cd:ef',
ipAddress: '10.10.1.202',
name: 'I am an M1XEP!',
port: 777,
});
expect(devices).toContainEqual({
deviceType: ElkDeviceType.C1M1,
macAddress: '77:88:99:aa:bb:cc',
ipAddress: '192.168.1.100',
port: 2101,
securePort: 5665,
});
});
it('does not report duplicate devices', async () => {
expect.assertions(1);
const result = client.start();
dgramMockInstance.emit('message', M1XEP_MSG);
dgramMockInstance.emit('message', C1M1_MSG);
dgramMockInstance.emit('message', M1XEP_MSG);
jest.advanceTimersByTime(5000);
const devices = await result;
expect(devices.length).toBe(2);
});
it('ignores invalid messages', async () => {
expect.assertions(1);
const result = client.start();
dgramMockInstance.emit('message', M1XEP_MSG);
dgramMockInstance.emit('message', C1M1_MSG);
dgramMockInstance.emit('message', Buffer.from([0, 0, 0, 0, 0, 0, 0]));
jest.advanceTimersByTime(5000);
const devices = await result;
expect(devices.length).toBe(2);
});
it("ignores it's own discovery messages", async () => {
expect.assertions(1);
const result = client.start();
dgramMockInstance.emit('message', C1M1_MSG);
dgramMockInstance.emit('message', Buffer.from('C1M1ID', 'ascii'));
jest.advanceTimersByTime(5000);
const devices = await result;
expect(devices.length).toBe(1);
});
it('rejects on an error', async () => {
expect.assertions(1);
const result = client.start();
const fakeError = new Error('oops');
dgramMockInstance.emit('error', fakeError);
try {
await result;
} catch (err) {
expect(err).toBe(fakeError);
}
});
it('does not reject if already resolved', async () => {
expect.assertions(1);
const result = client.start();
dgramMockInstance.emit('close');
dgramMockInstance.emit('error', new Error('oops'));
const devices = await result;
expect(devices.length).toBe(0);
});
});
describe('with only M1XEP discovery', () => {
beforeEach(() => {
client = new ElkDiscoveryClient({ deviceTypes: [ElkDeviceType.M1XEP] });
});
it('requests only M1XEP device types', async () => {
expect.assertions(2);
const sendMock = jest.fn();
dgramMockInstance.send = sendMock;
const result = client.start();
jest.advanceTimersByTime(5000);
const devices = await result;
expect(sendMock.mock.calls.length).toBe(1);
expect(sendMock).toBeCalledWith(
M1XEP_DISCOVERY_ID,
0,
M1XEP_DISCOVERY_ID.length,
DEFAULT_DISCOVERY_OPTIONS.port,
DEFAULT_DISCOVERY_OPTIONS.broadcastAddress
);
});
});
describe('with only C1M1 discovery', () => {
beforeEach(() => {
client = new ElkDiscoveryClient({ deviceTypes: [ElkDeviceType.C1M1] });
});
it('requests only M1XEP device types', async () => {
expect.assertions(2);
const sendMock = jest.fn();
dgramMockInstance.send = sendMock;
const result = client.start();
jest.advanceTimersByTime(5000);
const devices = await result;
expect(sendMock.mock.calls.length).toBe(1);
expect(sendMock).toBeCalledWith(
C1M1_DISCOVERY_ID,
0,
C1M1_DISCOVERY_ID.length,
DEFAULT_DISCOVERY_OPTIONS.port,
DEFAULT_DISCOVERY_OPTIONS.broadcastAddress
);
});
});
});