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andrewmclagan/igor-example.js

Created August 20, 2020 04:44
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Dependancy mocking in JS
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igor-example.js
// addNumbers.js
import calculator from 'calculator';
export default function addNumbers(a, b) {
return calculator.add(a, b);
}
// addNumbers.spec.js
import addNumbers from 'addNumbers.js'
import calculator from 'calculator';
jest.mock('calculator');
it('adds two numbers', () => {
addNumbers(36, 10);
expect(calculator.add.mock).toBeCalledWith(36, 10);
});
@andrewmclagan
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not sure if the code actually works...

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