How can I effectively test my Node.js applications?

How can I effectively test my Node.js applications?

You can use frameworks like Mocha, Jest, or Jasmine for unit testing. Would you like to know more about any specific framework?

What are the differences between Mocha and Jest?

Mocha is more flexible and allows you to choose your assertion library, while Jest comes with built-in assertions and is more opinionated. Do you have a preference?

I prefer Jest. How do I set it up?

To set up Jest, you can install it via npm with npm install --save-dev jest. Then, add a test script in your package.json. Would you like help with writing your first test?

Yes, please show me an example of a simple test.

Sure! Here's a simple test for a function that adds two numbers:

function add(a, b) {
  return a + b;
}

test('adds 1 + 2 to equal 3', () => {
  expect(add(1, 2)).toBe(3);
});