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20 lines
646 B
JavaScript
20 lines
646 B
JavaScript
import { factorial } from '../Factorial'
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describe('Factorial', () => {
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it('should return factorial 1 for value "0"', () => {
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expect(factorial(0)).toBe(1)
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})
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it('should return factorial 120 for value "5"', () => {
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expect(factorial(5)).toBe(120)
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})
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it('Throw Error for Invalid Input', () => {
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expect(() => factorial('-')).toThrow('Not a Whole Number')
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expect(() => factorial(null)).toThrow('Not a Whole Number')
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expect(() => factorial(undefined)).toThrow('Not a Whole Number')
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expect(() => factorial(3.142)).toThrow('Not a Whole Number')
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expect(() => factorial(-1)).toThrow('Not a Positive Number')
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})
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})
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