Node assert

The Node.js assert module provides a set of assertion tests for verifying invariants. These tests are used to write tests that run within the Node.js framework.

The assert module provides a way of testing expressions. It is used to write tests for your applications, and it provides functions that throw an error if a condition is not met.

You can use the assert module by requiring it in your Node.js application using the require() function. For example:

const assert = require('assert');

Once you have required the assert module, you can use its functions to perform various types of assertions. For example, you can use assert.ok() to test if a value is truthy, assert.equal() to test for equality, and assert.strictEqual() to test for strict equality.

If an assertion fails, the assert module will throw an AssertionError with a message describing the failure. This can be useful for debugging and understanding why a test has failed.

Overall, the assert module is a useful tool for writing tests within the Node.js framework and ensuring that your code behaves as expected.