13 lines
347 B
JavaScript
13 lines
347 B
JavaScript
const expect = require('expect');
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const {isBoolean} = require('./_30s.js');
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test('isBoolean is a Function', () => {
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expect(isBoolean).toBeInstanceOf(Function);
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});
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test('passed value is not a boolean', () => {
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expect(isBoolean(null)).toBeFalsy();
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});
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test('passed value is not a boolean', () => {
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expect(isBoolean(false)).toBeTruthy();
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});
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