How to test node.js websocket server with mocha?
How to test node.js websocket server with mocha?
1 answer
by
giovanny.lueilwitz ,
4 months ago
@dedrick
To test a Node.js websocket server with Mocha, you can use a testing library such as chai to make assertions on the behavior of your websocket server. Here's a basic example of how you can test a websocket server using Mocha:
- Install Mocha and Chai:
1
|
npm install mocha chai --save-dev |
- Create a test file (test/websocket.test.js) with the following content:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 |
const WebSocket = require('ws');
const { expect } = require('chai');
describe('Websocket Server', function() {
let websocketServer;
before(function() {
// Start your websocket server before running tests
websocketServer = new WebSocket.Server({ port: 8080 });
});
after(function() {
// Close the websocket server after running tests
websocketServer.close();
});
it('should receive a message', function(done) {
const client = new WebSocket('ws://localhost:8080');
client.on('open', function() {
client.send('Hello, Server!');
});
websocketServer.on('connection', function(ws) {
ws.on('message', function(message) {
expect(message).to.equal('Hello, Server!');
client.close();
done();
});
});
});
});
|
- Update your package.json file to include the test script:
1 2 3 |
"scripts": {
"test": "mocha"
}
|
- Run your tests:
1
|
npm test |
This is a basic example to get you started with testing a Node.js websocket server with Mocha. You can expand upon this by testing additional functionality, handling errors, and mocking external dependencies.