tina
52 lines
1.6 KiB
JavaScript
52 lines
1.6 KiB
JavaScript
import chai from 'chai'
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import { AssertionError } from 'assert'
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import periodInfo from '../lib/period-length'
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const expect = chai.expect
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describe('getPeriodLengthStats', () => {
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it('works for a simple odd-numbered array', () => {
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const periodLengths = [99, 5, 1, 2, 100]
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const result = periodInfo(periodLengths)
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const expectedResult = {
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minimum: 1,
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maximum: 100,
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mean: 41.4,
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median: 5,
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stdDeviation: 53.06
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}
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expect(result).to.eql(expectedResult)
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})
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it('works for a simple even-numbered array', () => {
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const periodLengths = [4, 1, 15, 2, 20, 5]
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const result = periodInfo(periodLengths)
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const expectedResult = {
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minimum: 1,
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maximum: 20,
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mean: 7.83,
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median: 4.5,
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stdDeviation: 7.78
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}
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expect(result).to.eql(expectedResult)
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})
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describe('when args are wrong', () => {
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it('throws when arg object is an empty array', () => {
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const periodLengths = []
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expect(() => periodInfo(periodLengths).to.throw(AssertionError))
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})
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it('throws when arg object is not in right format', () => {
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const wrongObject = { hello: 'world' }
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expect(() => periodInfo(wrongObject).to.throw(AssertionError))
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})
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it('throws when arg array contains a string', () => {
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const wrongElement = [4, 1, 15, '2', 20, 5]
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expect(() => periodInfo(wrongElement).to.throw(AssertionError))
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})
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it('throws when arg array contains a NaN', () => {
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const wrongElement = [4, 1, 15, NaN, 20, 5]
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expect(() => periodInfo(wrongElement).to.throw(AssertionError))
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})
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})
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}) |