diff --git a/lib/cycle-length.js b/lib/cycle-length.js index 956328d..6d8f919 100644 --- a/lib/cycle-length.js +++ b/lib/cycle-length.js @@ -1,5 +1,3 @@ -import assert from 'assert' - export function getCycleLengthStats(cycleLengths) { throwIfArgsAreNotInRequiredFormat(cycleLengths) const cycleLengthStats = {} @@ -8,27 +6,27 @@ export function getCycleLengthStats(cycleLengths) { }) cycleLengthStats.minimum = sortedCycleLengths[0] cycleLengthStats.maximum = sortedCycleLengths[cycleLengths.length - 1] - cycleLengthStats.mean = Math.round( - cycleLengths.reduce(getSum) / cycleLengths.length * 100 - ) / 100 + cycleLengthStats.mean = + Math.round((cycleLengths.reduce(getSum) / cycleLengths.length) * 100) / 100 // median if (cycleLengths.length % 2 == 1) { - cycleLengthStats.median = sortedCycleLengths[ - (cycleLengths.length + 1) / 2 - 1 - ] + cycleLengthStats.median = + sortedCycleLengths[(cycleLengths.length + 1) / 2 - 1] } else { const middle = cycleLengths.length / 2 - cycleLengthStats.median = (sortedCycleLengths[middle - 1] + - sortedCycleLengths[middle]) / 2 + cycleLengthStats.median = + (sortedCycleLengths[middle - 1] + sortedCycleLengths[middle]) / 2 } // corrected standard deviation (based on unbiased sample variance) if (cycleLengths.length > 1) { - const sumOfSquares = cycleLengths.map(cycleLength => { - return Math.pow(cycleLength - cycleLengthStats.mean, 2) - }).reduce(getSum) - cycleLengthStats.stdDeviation = Math.round( - Math.sqrt(sumOfSquares / (cycleLengths.length - 1 )) * 100 - ) / 100 + const sumOfSquares = cycleLengths + .map((cycleLength) => { + return Math.pow(cycleLength - cycleLengthStats.mean, 2) + }) + .reduce(getSum) + cycleLengthStats.stdDeviation = + Math.round(Math.sqrt(sumOfSquares / (cycleLengths.length - 1)) * 100) / + 100 } else { cycleLengthStats.stdDeviation = null } @@ -40,10 +38,11 @@ function getSum(total, num) { } function throwIfArgsAreNotInRequiredFormat(cycleLengths) { - assert.ok(Array.isArray(cycleLengths), 'Input should be an array.') - assert.ok(cycleLengths.length > 0, 'Input array should not be empty.') - cycleLengths.forEach(cycleLength => { - assert.equal(typeof cycleLength, 'number', 'Elements in the array should be of type number.') - assert.ok(!isNaN(cycleLength), 'Elements of array should not be NaN.') + if (!Array.isArray(cycleLengths)) throw new Error('Input should be an array.') + if (cycleLengths.length < 1) + throw new Error('Input array should not be empty.') + cycleLengths.forEach((cycleLength) => { + if (typeof cycleLength !== 'number' || Number.isNaN(cycleLength)) + throw new Error('Elements in the array should be of type number.') }) -} \ No newline at end of file +} diff --git a/package-lock.json b/package-lock.json index cfb50e7..5447e65 100644 --- a/package-lock.json +++ b/package-lock.json @@ -1929,12 +1929,14 @@ } }, "assert": { - "version": "1.5.0", - "resolved": "https://registry.npmjs.org/assert/-/assert-1.5.0.tgz", - "integrity": 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"sha512-61pPlCD9h51VoreyJ0BReideM3MDKMKnh6+V9L08331ipq6Q8OFXZYiqP6n/tbHx4s5I9uRhcye6BrbkizkBDw==", + "requires": { + "call-bind": "^1.0.2", + "has-bigints": "^1.0.2", + "has-symbols": "^1.0.3", + "which-boxed-primitive": "^1.0.2" + } + } + } + }, "wide-align": { "version": "1.1.3", "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz", diff --git a/package.json b/package.json index 8a18299..0fa7c7c 100644 --- a/package.json +++ b/package.json @@ -32,7 +32,6 @@ "@ptomasroos/react-native-multi-slider": "^2.2.0", "@react-native-community/datetimepicker": "^6.2.0", "@react-native-community/push-notification-ios": "^1.8.0", - "assert": "^1.4.1", "csvtojson": "^2.0.8", "i18next": "^21.8.14", "isobject": "^3.0.1", @@ -61,7 +60,7 @@ "realm": "^10.16.0", "redux": "^4.0.1", "redux-starter-kit": "^0.6.3", - "sympto": "2.0.0" + "sympto": "3.0.1" }, "devDependencies": { "@babel/core": "^7.6.2", diff --git a/test/cycle-length.spec.js b/test/cycle-length.spec.js index fc0d451..cf0a27f 100644 --- a/test/cycle-length.spec.js +++ b/test/cycle-length.spec.js @@ -1,7 +1,6 @@ import chai from 'chai' -import { AssertionError } from 'assert' -import {getCycleLengthStats as cycleInfo} from '../lib/cycle-length' +import { getCycleLengthStats as cycleInfo } from '../lib/cycle-length' const expect = chai.expect @@ -14,92 +13,89 @@ describe('getCycleLengthStats', () => { maximum: 100, mean: 41.4, median: 5, - stdDeviation: 53.06 + stdDeviation: 53.06, } expect(result).to.eql(expectedResult) }), - - it('works for a simple even-numbered array', () => { - const cycleLengths = [4, 1, 15, 2, 20, 5] - const result = cycleInfo(cycleLengths) - const expectedResult = { - minimum: 1, - maximum: 20, - mean: 7.83, - median: 4.5, - stdDeviation: 7.78 - } - expect(result).to.eql(expectedResult) - }), - - it('works for an one-element array', () => { - const cycleLengths = [42] - const result = cycleInfo(cycleLengths) - const expectedResult = { - minimum: 42, - maximum: 42, - mean: 42, - median: 42, - stdDeviation: null - } - expect(result).to.eql(expectedResult) - }), - - describe('works for more realistic examples', () => { - it('1 day difference between shortest and longest period', () => { - const cycleLengths = [28, 29, 28, 28, 28, 29, 28, 28, 28, 29, 29, 28] + it('works for a simple even-numbered array', () => { + const cycleLengths = [4, 1, 15, 2, 20, 5] const result = cycleInfo(cycleLengths) const expectedResult = { - minimum: 28, - maximum: 29, - mean: 28.33, - median: 28, - stdDeviation: 0.49 + minimum: 1, + maximum: 20, + mean: 7.83, + median: 4.5, + stdDeviation: 7.78, } expect(result).to.eql(expectedResult) }), - it('3 days difference between shortest and longest period', () => { - const cycleLengths = [28, 29, 28, 28, 27, 30, 28, 27, 28, 28, 29, 27] + it('works for an one-element array', () => { + const cycleLengths = [42] const result = cycleInfo(cycleLengths) const expectedResult = { - minimum: 27, - maximum: 30, - mean: 28.08, - median: 28, - stdDeviation: 0.90 + minimum: 42, + maximum: 42, + mean: 42, + median: 42, + stdDeviation: null, } expect(result).to.eql(expectedResult) }), - it('8 days difference between shortest and longest period', () => { - const cycleLengths = [28, 32, 29, 27, 28, 26, 33, 28, 29, 34, 27, 29] - const result = cycleInfo(cycleLengths) - const expectedResult = { - minimum: 26, - maximum: 34, - mean: 29.17, - median: 28.5, - stdDeviation: 2.52 - } - expect(result).to.eql(expectedResult) + describe('works for more realistic examples', () => { + it('1 day difference between shortest and longest period', () => { + const cycleLengths = [28, 29, 28, 28, 28, 29, 28, 28, 28, 29, 29, 28] + const result = cycleInfo(cycleLengths) + const expectedResult = { + minimum: 28, + maximum: 29, + mean: 28.33, + median: 28, + stdDeviation: 0.49, + } + expect(result).to.eql(expectedResult) + }), + it('3 days difference between shortest and longest period', () => { + const cycleLengths = [28, 29, 28, 28, 27, 30, 28, 27, 28, 28, 29, 27] + const result = cycleInfo(cycleLengths) + const expectedResult = { + minimum: 27, + maximum: 30, + mean: 28.08, + median: 28, + stdDeviation: 0.9, + } + expect(result).to.eql(expectedResult) + }), + it('8 days difference between shortest and longest period', () => { + const cycleLengths = [28, 32, 29, 27, 28, 26, 33, 28, 29, 34, 27, 29] + const result = cycleInfo(cycleLengths) + const expectedResult = { + minimum: 26, + maximum: 34, + mean: 29.17, + median: 28.5, + stdDeviation: 2.52, + } + expect(result).to.eql(expectedResult) + }) }) - }) describe('when args are wrong', () => { it('throws when arg object is an empty array', () => { const cycleLengths = [] - expect(() => cycleInfo(cycleLengths).to.throw(AssertionError)) + expect(() => cycleInfo(cycleLengths)).to.throw(Error) }), - it('throws when arg object is not in right format', () => { - const wrongObject = { hello: 'world' } - expect(() => cycleInfo(wrongObject).to.throw(AssertionError)) - }), - it('throws when arg array contains a string', () => { - const wrongElement = [4, 1, 15, '2', 20, 5] - expect(() => cycleInfo(wrongElement).to.throw(AssertionError)) - }), - it('throws when arg array contains a NaN', () => { - const wrongElement = [4, 1, 15, NaN, 20, 5] - expect(() => cycleInfo(wrongElement).to.throw(AssertionError)) - }) + it('throws when arg object is not in right format', () => { + const wrongObject = { hello: 'world' } + expect(() => cycleInfo(wrongObject)).to.throw(Error) + }), + it('throws when arg array contains a string', () => { + const wrongElement = [4, 1, 15, '2', 20, 5] + expect(() => cycleInfo(wrongElement)).to.throw(Error) + }), + it('throws when arg array contains a NaN', () => { + const wrongElement = [4, 1, 15, NaN, 20, 5] + expect(() => cycleInfo(wrongElement)).to.throw(Error) + }) }) -}) \ No newline at end of file +})