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import {

factorial,

permutation,

combination

} from '../PermutationAndCombination'

describe('Factorial', () => {

it('factorial(5)', () => {

expect(factorial(5)).toBe(120)

})

})

describe('Permutation', () => {

it('permutation(5, 2)', () => {

expect(permutation(5, 2)).toBe(20)

})

})

describe('Combination', () => {

it('combination(5, 2)', () => {

expect(combination(5, 2)).toBe(10)

})

})