16 lines
429 B
JavaScript
16 lines
429 B
JavaScript
const expect = require('expect');
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const { isNegativeZero } = require('._30s.js');
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test('isNegativeZero is a Function', () => {
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expect(isNegativeZero).toBeInstanceOf(Function);
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});
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test('0 is not a -0', () => {
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expect(isNegativeZero(0)).toBeFalsy();
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});
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test('-0 is a negative zero', () => {
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expect(isNegativeZero(-0)).toBeTruthy();
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});
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test('1 is not a negative zero', () => {
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expect(isNegativeZero(1)).toBeFalsy();
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});
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