How to wait or share data between files in mocha?

Member

by shyann , in category: Javascript , 3 months ago

How to wait or share data between files in mocha?

Facebook Twitter LinkedIn Telegram Whatsapp

1 answer

by darrion.kuhn , 2 months ago

@shyann 

In Mocha, you can wait for asynchronous functions to complete by using the done argument in your test functions. This allows you to delay the completion of the test until the asynchronous function has finished executing. Here's an example of how you can do this:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
describe('Your test suite', function() {
  it('should wait for asynchronous function to finish', function(done) {
    // Call your asynchronous function here
    asyncFunction(function() {
      // This will only get called after asyncFunction has finished
      done();
    });
  });
});

// Your async function
function asyncFunction(callback) {
  setTimeout(function() {
    console.log('Async function done');
    callback();
  }, 1000);
}


To share data between files in Mocha, you can use global variables or modules. Here's an example using a global variable:

1
2
3
4
5
// Test file 1
global.sharedData = 10;

// Test file 2
console.log(global.sharedData); // Outputs 10


Alternatively, you can use Node.js modules to share data between files. Here's an example using a module:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
// sharedData.js
module.exports = {
  sharedData: 10
}

// Test file 1
const sharedData = require('./sharedData');
console.log(sharedData.sharedData);

// Test file 2
const sharedData = require('./sharedData');
console.log(sharedData.sharedData);


By using global variables or modules, you can easily share data between different test files in Mocha.