83a6a6ea32
* chore: make aware eslint that we use jest By setting up the jest environment, we no longer need to declare the 'test' global in the configuration. * chore: don't need to import expect, it's a jest environment global * chore: don't need to import expect when creating undefined test
10 lines
374 B
JavaScript
10 lines
374 B
JavaScript
const {coalesceFactory} = require('./_30s.js');
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test('coalesceFactory is a Function', () => {
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expect(coalesceFactory).toBeInstanceOf(Function);
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});
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const customCoalesce = coalesceFactory(_ => ![null, undefined, '', NaN].includes(_));
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test('Returns a customized coalesce function', () => {
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expect(customCoalesce(undefined, null, NaN, '', 'Waldo')).toEqual('Waldo');
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});
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