10 lines
267 B
JavaScript
10 lines
267 B
JavaScript
const expect = require('expect');
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const {isUndefined} = require('./_30s.js');
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test('isUndefined is a Function', () => {
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expect(isUndefined).toBeInstanceOf(Function);
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});
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test('Returns true for undefined', () => {
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expect(isUndefined(undefined)).toBeTruthy();
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});
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