How To Expose External Library In Browser So Jest Unit Tests Can See It?

I'm writing a math library to be used in a browser, and using Jest to run unit tests on it (which I realize is more geared toward Node). I've solved most of the issues by extendin

Solution 1:

The global namespace object in Node is available as global.

You can add math to the global namespace object like this:

global.math = require('./math.js');
const { cv } = require('./CalRunWebMath.js');

test('Calculates coefficient of variation', () => {
  var data1 = [10.4, 20.3, 30.2, 40.1];
  expect(cv(data1)).toBe(0.5061720808904743);  // Success!
});