What are the best practices for function wrapping in programming?

What are the best practices for function wrapping in programming?

Function wrapping is a technique used to enhance or modify the behavior of existing functions. Best practices include keeping the wrapper function simple, ensuring it maintains the original function's context, and handling errors gracefully.

Can you give me an example of a function wrapper?

Sure! Here's a simple example in JavaScript:

function wrapFunction(originalFunction) {
    return function(...args) {
        console.log('Function is being called');
        return originalFunction(...args);
    };
}

const wrappedFunction = wrapFunction(function(x) { return x * 2; });
console.log(wrappedFunction(5)); // Logs: Function is being called

What should I avoid when wrapping functions?

Avoid making the wrapper too complex, which can lead to confusion. Also, ensure that the wrapper does not alter the expected input/output of the original function.

How can I test a wrapped function?

You can test a wrapped function by calling it with various inputs and comparing the outputs to the original function. Use unit tests to automate this process.