node karma fs object null

I'm currently conducting node tests with karma, using both phantom and real browsers.

No matter which approach I take, I keep encountering an error with the fs read file functions.

 'undefined' is not an object (evaluating 'fs.existsSync')

This occurs even when working with a basic file setup like:

var fs = require('fs');
console.error(fs);
var text = fs.readFile('data.txt', 'utf8');

The first console output shows Object {}. The second one leads to the aforementioned error. It seems like the object is empty.

I am utilizing the latest version of karma and its dependencies.

If anyone could offer insight into why the fs object is empty or not functioning properly, I would greatly appreciate it.

Answer №1

If you are using Karma as the client-side js test runner, keep in mind that you cannot utilize node file system with it. It is recommended to use a different test runner like Mocha for testing server-side js. By using Mocha for server-side js, specifically nodejs, you will have access to the node filesystem.

Alternatively, you can read files from the client side by using XMLHttpRequest(). For more information on this topic, check out this question: Javascript - read local text file

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