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
9 lines
255 B
JavaScript
9 lines
255 B
JavaScript
const {negate} = require('./_30s.js');
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test('negate is a Function', () => {
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expect(negate).toBeInstanceOf(Function);
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});
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test('Negates a predicate function', () => {
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expect([1, 2, 3, 4, 5, 6].filter(negate(n => n % 2 === 0))).toEqual([1, 3, 5]);
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});
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