16 lines
408 B
JavaScript
16 lines
408 B
JavaScript
const expect = require('expect');
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const {isNil} = require('./_30s.js');
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test('isNil is a Function', () => {
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expect(isNil).toBeInstanceOf(Function);
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});
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test('Returns true for null', () => {
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expect(isNil(null)).toBeTruthy();
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});
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test('Returns true for undefined', () => {
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expect(isNil(undefined)).toBeTruthy();
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});
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test('Returns false for an empty string', () => {
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expect(isNil('')).toBeFalsy();
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});
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