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
12 lines
288 B
JavaScript
12 lines
288 B
JavaScript
const {isNull} = require('./_30s.js');
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test('isNull is a Function', () => {
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expect(isNull).toBeInstanceOf(Function);
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});
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test('passed argument is a null', () => {
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expect(isNull(null)).toBeTruthy();
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});
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test('passed argument is a null', () => {
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expect(isNull(NaN)).toBeFalsy();
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});
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