Use new isCycleStartFunctions throughout cycle module

components/stats.js

@@ -9,16 +9,17 @@ import cycleModule from '../lib/cycle'
 import {getCycleLengthStats as getCycleInfo} from '../lib/cycle-length'
 import {stats as labels} from './labels'
 import AppText from './app-text'
+import { getCycleStartsSortedByDate } from '../db'
 
 export default class Stats extends Component {
   render() {
-    const allMensesStarts = cycleModule().getAllMensesStarts()
+    const allMensesStarts = getCycleStartsSortedByDate()
     const atLeastOneCycle = allMensesStarts.length > 1
     let cycleLengths
     let numberOfCycles
     let cycleInfo
     if (atLeastOneCycle) {
-      cycleLengths = cycleModule().getCycleLength(allMensesStarts)
+      cycleLengths = cycleModule().getAllCycleLengths()
       numberOfCycles = cycleLengths.length
       if (numberOfCycles > 1) {
         cycleInfo = getCycleInfo(cycleLengths)

db/index.js

@@ -51,6 +51,10 @@ export function getCycleDaysSortedByDate() {
   return db.objects('CycleDay').sorted('date', true)
 }
 
+export function getCycleStartsSortedByDate() {
+  return db.objects('CycleDay').filtered('isCycleStart = true').sorted('date', true)
+}
+
 export function saveSymptom(symptom, cycleDay, val) {
   db.write(() => {
     if (symptom === 'bleeding') {

lib/cycle.js

@@ -5,6 +5,7 @@ const DAYS = joda.ChronoUnit.DAYS
 
 export default function config(opts) {
   let bleedingDaysSortedByDate
+  let cycleStartsSortedByDate
   let cycleDaysSortedByDate
   let maxBreakInBleeding
   let maxCycleLength
@@ -14,57 +15,22 @@ export default function config(opts) {
     // we only want to require (and run) the db module
     // when not running the tests
     bleedingDaysSortedByDate = require('../db').getBleedingDaysSortedByDate()
+    cycleStartsSortedByDate = require('../db').getCycleStartsSortedByDate()
     cycleDaysSortedByDate = require('../db').getCycleDaysSortedByDate()
     maxBreakInBleeding = 1
     maxCycleLength = 99
     minCyclesForPrediction = 3
   } else {
     bleedingDaysSortedByDate = opts.bleedingDaysSortedByDate || []
+    cycleStartsSortedByDate = opts.cycleStartsSortedByDate || []
     cycleDaysSortedByDate = opts.cycleDaysSortedByDate || []
     maxBreakInBleeding = opts.maxBreakInBleeding || 1
     maxCycleLength = opts.maxCycleLength || 99
     minCyclesForPrediction = opts.minCyclesForPrediction || 3
   }
 
-  function findLatestMensesStart(bleedingDays) {
-    if (!bleedingDays.length) return null
-
-    // assumes bleeding days are ordered latest first, and
-    // excluded values already removed
-    const lastMensesStart = bleedingDays.find((day, i) => {
-      return noBleedingDayWithinThreshold(day, bleedingDays.slice(i + 1))
-    })
-
-    function noBleedingDayWithinThreshold(day, previousBleedingDays) {
-      const localDate = LocalDate.parse(day.date)
-      const threshold = localDate.minusDays(maxBreakInBleeding + 1).toString()
-      return !previousBleedingDays.some(({ date }) => date >= threshold)
-    }
-
-    return lastMensesStart
-  }
-
   function getLastMensesStartForDay(targetDateString) {
-    // the index of the first bleeding day before the target day
-    const index = bleedingDaysSortedByDate.findIndex(day => {
-      return day.date <= targetDateString && !day.bleeding.exclude
-    })
-
-    if (index < 0) return null
-
-    const prevBleedingDays = bleedingDaysSortedByDate.slice(index)
-    return findLatestMensesStart(prevBleedingDays)
-  }
-
-  function getFollowingMensesStartForDay(targetDateString) {
-    const followingBleedingDays = bleedingDaysSortedByDate
-      .filter(day => !day.bleeding.exclude)
-      .reverse()
-
-    const firstBleedingDayAfterTargetDay = followingBleedingDays
-      .find(day => day.date > targetDateString)
-
-    return firstBleedingDayAfterTargetDay
+    return cycleStartsSortedByDate.find(start => start.date <= targetDateString)
   }
 
   function getCycleDayNumber(targetDateString) {
@@ -78,59 +44,44 @@ export default function config(opts) {
     return diffInDays + 1
   }
 
-  function getCyclesBefore(targetCycleStartDay) {
-    return collectPreviousCycles([], targetCycleStartDay.date)
-  }
-
-  function collectPreviousCycles(acc, startOfFollowingCycle) {
-    const cycle = getPreviousCycle(startOfFollowingCycle)
-    if (!cycle || !cycle.length) return acc
-    acc.push(cycle)
-    return collectPreviousCycles(acc, cycle[cycle.length - 1].date)
-  }
-
   function getPreviousCycle(dateString) {
-    const startOfCycle = getLastMensesStartForDay(dateString)
-    if (!startOfCycle) return null
-    const dateBeforeStartOfCycle = LocalDate
-      .parse(startOfCycle.date)
-      .minusDays(1)
-      .toString()
-
-    return getCycleForDay(dateBeforeStartOfCycle)
-  }
-
-  function getCycleForDay(dayOrDate) {
-    const dateString = typeof dayOrDate === 'string' ? dayOrDate : dayOrDate.date
     const cycleStart = getLastMensesStartForDay(dateString)
     if (!cycleStart) return null
-    const cycleStartIndex = cycleDaysSortedByDate.indexOf(cycleStart)
-    const nextMensesStart = getFollowingMensesStartForDay(dateString)
+    const i = cycleDaysSortedByDate.indexOf(cycleStart)
+    const earlierCycleStart = cycleDaysSortedByDate[i - 1]
+    if (!earlierCycleStart) return null
+    return getCycleForStartDay(earlierCycleStart)
+  }
+
+  function getCyclesBefore(targetCycleStartDay) {
+    const startFromHere = cycleStartsSortedByDate.findIndex(start => {
+      return start.date < targetCycleStartDay.date
+    })
+    if (startFromHere < 0) return null
+    return cycleStartsSortedByDate
+      .slice(startFromHere)
+      .map(getCycleForStartDay)
+  }
+
+  function getCycleForStartDay(startDay) {
+    const cycleStartIndex = cycleDaysSortedByDate.indexOf(startDay)
+    const i = cycleStartsSortedByDate.indexOf(startDay)
+    const nextMensesStart = cycleStartsSortedByDate[i - 1]
     if (nextMensesStart) {
       return cycleDaysSortedByDate.slice(
         cycleDaysSortedByDate.indexOf(nextMensesStart) + 1,
-        cycleStartIndex + 1
+        cycleStartIndex + 1,
       )
     } else {
       return cycleDaysSortedByDate.slice(0, cycleStartIndex + 1)
     }
   }
 
-  function getAllMensesStarts(initialBleedingDays = bleedingDaysSortedByDate) {
-    return recurse(initialBleedingDays.filter(d => !d.bleeding.exclude))
-
-    function recurse(bleedingDays, collectedDates) {
-      collectedDates = collectedDates || []
-      const lastStart = findLatestMensesStart(bleedingDays)
-      if (!lastStart) {
-        return collectedDates
-      } else {
-        collectedDates.push(lastStart.date)
-        const index = bleedingDays.indexOf(lastStart)
-        const remainingDays = bleedingDays.slice(index + 1)
-        return recurse(remainingDays, collectedDates)
-      }
-    }
+  function getCycleForDay(dayOrDate) {
+    const dateString = typeof dayOrDate === 'string' ? dayOrDate : dayOrDate.date
+    const cycleStart = getLastMensesStartForDay(dateString)
+    if (!cycleStart) return null
+    return getCycleForStartDay(cycleStart)
   }
 
   function isMensesStart(cycleDay) {
@@ -174,32 +125,33 @@ export default function config(opts) {
     }
   }
 
-  function getCycleLength(cycleStartDates) {
-    const cycleLengths = []
-    for (let i = 0; i < cycleStartDates.length - 1; i++) {
-      const nextCycleStart = LocalDate.parse(cycleStartDates[i])
-      const cycleStart = LocalDate.parse(cycleStartDates[i + 1])
-      const cycleLength = cycleStart.until(nextCycleStart, DAYS)
-      if (cycleLength <= maxCycleLength) { cycleLengths.push(cycleLength) }
-    }
-    return cycleLengths
+  function getAllCycleLengths() {
+    return cycleStartsSortedByDate
+      .map(day => LocalDate.parse(day.date))
+      .reduce((lengths, cycleStart, i, startsAsLocalDates) => {
+        if (i === startsAsLocalDates.length - 1) return lengths
+        const prevCycleStart = startsAsLocalDates[i + 1]
+        const cycleLength = prevCycleStart.until(cycleStart, DAYS)
+        if (cycleLength <= maxCycleLength) { lengths.push(cycleLength) }
+        return lengths
+      }, [])
   }
 
   function getPredictedMenses() {
-    const allMensesStarts = getAllMensesStarts()
+    const allMensesStarts = cycleStartsSortedByDate
     const atLeastOneCycle = allMensesStarts.length > 1
     if (!atLeastOneCycle ||
       allMensesStarts.length < minCyclesForPrediction
     ) {
       return []
     }
-    const cycleLengths = getCycleLength(allMensesStarts)
+    const cycleLengths = getAllCycleLengths()
     const cycleInfo = getCycleLengthStats(cycleLengths)
     const periodDistance = Math.round(cycleInfo.mean)
     let periodStartVariation
     if (cycleInfo.stdDeviation === null) {
       periodStartVariation = 2
-    } else if (cycleInfo.stdDeviation < 1.5) { // threshold is choosen a little arbitrarily
+    } else if (cycleInfo.stdDeviation < 1.5) { // threshold is chosen a little arbitrarily
       periodStartVariation = 1
     } else {
       periodStartVariation = 2
@@ -207,7 +159,7 @@ export default function config(opts) {
     if (periodDistance - 5 < periodStartVariation) { // otherwise predictions overlap
       return []
     }
-    let lastStart = LocalDate.parse(allMensesStarts[0])
+    let lastStart = LocalDate.parse(allMensesStarts[0].date)
     const predictedMenses = []
     for (let i = 0; i < 3; i++) {
       lastStart = lastStart.plusDays(periodDistance)
@@ -227,8 +179,7 @@ export default function config(opts) {
     getCycleForDay,
     getPreviousCycle,
     getCyclesBefore,
-    getAllMensesStarts,
-    getCycleLength,
+    getAllCycleLengths,
     getPredictedMenses,
     isMensesStart,
     getMensesDaysAfter

test/cycle.spec.js

@@ -1,158 +1,80 @@
 import chai from 'chai'
 import dirtyChai from 'dirty-chai'
 import cycleModule from '../lib/cycle'
-import { LocalDate } from 'js-joda'
 
 const expect = chai.expect
 chai.use(dirtyChai)
 
-function useBleedingDays(days) {
-  return cycleModule({ bleedingDaysSortedByDate: days }).getCycleDayNumber
-}
+// TODO getPreviousCycle
 
-describe('getCycleDay', () => {
+describe('getCycleDayNumber', () => {
   it('works for a simple example', () => {
-    const bleedingDays = [{
-      date: '2018-05-10',
-      bleeding: {
-        value: 2
-      }
-    }, {
+    const cycleStarts = [{
       date: '2018-05-09',
+      isCycleStart: true,
       bleeding: {
         value: 2
       }
     }, {
       date: '2018-05-03',
-      bleeding: {
-        value: 2
-      }
+      isCycleStart: true,
+      bleeding: { value: 2 }
     }]
-    const getCycleDayNumber = useBleedingDays(bleedingDays)
+    const getCycleDayNumber = cycleModule({
+      cycleStartsSortedByDate: cycleStarts
+    }).getCycleDayNumber
     const targetDate = '2018-05-17'
     const result = getCycleDayNumber(targetDate)
     expect(result).to.eql(9)
   })
 
-  it('works if some bleedings are exluded', function () {
-    const bleedingDays = [{
-      date: '2018-05-10',
-      bleeding: {
-        value: 2,
-        exclude: true
-      }
-    }, {
-      date: '2018-05-09',
-      bleeding: {
-        value: 2,
-        exclude: true
-      }
-    }, {
-      date: '2018-05-03',
-      bleeding: {
-        value: 2
-      }
-    }]
-    const targetDate = '2018-05-17'
-    const getCycleDayNumber = useBleedingDays(bleedingDays)
-    const result = getCycleDayNumber(targetDate)
-    expect(result).to.eql(15)
-  })
-
   it('gets the correct number if the target day is not in the current cycle', () => {
-    const bleedingDays = [{
+    const cycleStarts = [{
       date: '2018-05-13',
-      bleeding: {
-        value: 2
-      }
-    }, {
-      date: '2018-04-11',
+      isCycleStart: true,
       bleeding: {
         value: 2
       }
     }, {
       date: '2018-04-10',
-      bleeding: {
-        value: 2
-      }
+      isCycleStart: true,
+      bleeding: { value: 2 }
     }]
 
     const targetDate = '2018-04-27'
-    const getCycleDayNumber = useBleedingDays(bleedingDays)
+    const getCycleDayNumber = cycleModule({
+      cycleStartsSortedByDate: cycleStarts
+    }).getCycleDayNumber
     const result = getCycleDayNumber(targetDate)
     expect(result).to.eql(18)
   })
 
   it('gets the correct number if the target day is the only bleeding day', () => {
-    const bleedingDays = [{
+    const cycleStarts = [{
       date: '2018-05-13',
-      bleeding: {
-        value: 2
-      }
+      isCycleStart: true,
+      bleeding: { value: 2 }
     }]
 
     const targetDate = '2018-05-13'
-    const getCycleDayNumber = useBleedingDays(bleedingDays)
+    const getCycleDayNumber = cycleModule({
+      cycleStartsSortedByDate: cycleStarts
+    }).getCycleDayNumber
     const result = getCycleDayNumber(targetDate)
     expect(result).to.eql(1)
   })
 
-  describe('getCycleDay returns null', () => {
-    it('if there are no bleeding days', function () {
-      const bleedingDays = []
-      const targetDate = '2018-05-17'
-      const getCycleDayNumber = useBleedingDays(bleedingDays)
-      const result = getCycleDayNumber(targetDate)
-      expect(result).to.be.null()
-    })
+  it('returns null if there are no bleeding days', function () {
+    const cycleStarts = []
+    const targetDate = '2018-05-17'
+    const getCycleDayNumber = cycleModule({
+      cycleStartsSortedByDate: cycleStarts
+    }).getCycleDayNumber
+    const result = getCycleDayNumber(targetDate)
+    expect(result).to.be.null()
   })
 
-  describe('getCycleDay with cycle thresholds', () => {
-    const maxBreakInBleeding = 3
 
-    it('disregards bleeding breaks shorter than max allowed bleeding break in a bleeding period', () => {
-      const bleedingDays = [{
-        date: '2018-05-14',
-        bleeding: {
-          value: 2
-        }
-      }, {
-        date: '2018-05-10',
-        bleeding: {
-          value: 2
-        }
-      }]
-
-      const targetDate = '2018-05-17'
-      const getCycleDayNumber = cycleModule({
-        bleedingDaysSortedByDate: bleedingDays,
-        maxBreakInBleeding
-      }).getCycleDayNumber
-      const result = getCycleDayNumber(targetDate)
-      expect(result).to.eql(8)
-    })
-
-    it('counts bleeding breaks longer than maxAllowedBleedingBreak in a bleeding period', () => {
-      const bleedingDays = [{
-        date: '2018-05-14',
-        bleeding: {
-          value: 2
-        }
-      }, {
-        date: '2018-05-09',
-        bleeding: {
-          value: 2
-        }
-      }]
-      const targetDate = '2018-05-17'
-      const getCycleDayNumber = cycleModule({
-        bleedingDaysSortedByDate: bleedingDays,
-        maxBreakInBleeding
-      }).getCycleDayNumber
-      const result = getCycleDayNumber(targetDate)
-      expect(result).to.eql(4)
-    })
-  })
 })
 
 describe('getCyclesBefore', () => {
@@ -196,9 +118,18 @@ describe('getCyclesBefore', () => {
       },
     ]
 
+    const cycleStarts = [
+      '2018-07-05',
+      '2018-06-05',
+      '2018-05-03',
+      '2018-04-02'
+    ]
+
     const { getCyclesBefore } = cycleModule({
       cycleDaysSortedByDate,
-      bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
+      cycleStartsSortedByDate: cycleDaysSortedByDate.filter(d => {
+        return cycleStarts.includes(d.date)
+      })
     })
     const result = getCyclesBefore(cycleDaysSortedByDate[0])
     expect(result.length).to.eql(3)
@@ -282,9 +213,18 @@ describe('getCycleForDay', () => {
       bleeding: { value: 2 }
     },
   ]
+  const cycleStarts = [
+    '2018-07-05',
+    '2018-06-05',
+    '2018-05-03',
+    '2018-04-02'
+  ]
+
   const { getCycleForDay } = cycleModule({
     cycleDaysSortedByDate,
-    bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
+    cycleStartsSortedByDate: cycleDaysSortedByDate.filter(d => {
+      return cycleStarts.includes(d.date)
+    })
   })
 
   it('gets cycle that has only one day', () => {
@@ -350,16 +290,21 @@ describe('getPredictedMenses', () => {
   describe('cannot predict next menses', () => {
     it('if no bleeding is documented', () => {
       const cycleDaysSortedByDate = [ {} ]
+      const cycleStarts = []
 
       const { getPredictedMenses } = cycleModule({
         cycleDaysSortedByDate,
         bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding),
+        cycleStartsSortedByDate: cycleDaysSortedByDate.filter(d => {
+          return cycleStarts.includes(d.date)
+        }),
         maxCycleLength: 99,
         minCyclesForPrediction: 1
       })
       const result = getPredictedMenses()
       expect(result).to.eql([])
     })
+
     it('if one bleeding is documented (no completed cycle)', () => {
       const cycleDaysSortedByDate = [
         {
@@ -367,16 +312,21 @@ describe('getPredictedMenses', () => {
           bleeding: { value: 2 }
         }
       ]
+      const cycleStarts = ['2018-06-02']
 
       const { getPredictedMenses } = cycleModule({
         cycleDaysSortedByDate,
         bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding),
+        cycleStartsSortedByDate: cycleDaysSortedByDate.filter(d => {
+          return cycleStarts.includes(d.date)
+        }),
         maxCycleLength: 99,
         minCyclesForPrediction: 1
       })
       const result = getPredictedMenses()
       expect(result).to.eql([])
     })
+
     it('if number of cycles is below minCyclesForPrediction', () => {
       const cycleDaysSortedByDate = [
         {
@@ -392,10 +342,14 @@ describe('getPredictedMenses', () => {
           bleeding: { value: 2 }
         },
       ]
+      const cycleStarts = ['2018-06-01', '2018-05-01']
 
       const { getPredictedMenses } = cycleModule({
         cycleDaysSortedByDate,
-        bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
+        bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding),
+        cycleStartsSortedByDate: cycleDaysSortedByDate.filter(d => {
+          return cycleStarts.includes(d.date)
+        }),
       })
       const result = getPredictedMenses()
       expect(result).to.eql([])
@@ -413,10 +367,12 @@ describe('getPredictedMenses', () => {
           bleeding: { value: 2 }
         }
       ]
-
+      const cycleStarts = ['2018-07-15', '2018-07-01']
       const { getPredictedMenses } = cycleModule({
         cycleDaysSortedByDate,
-        bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding),
+        cycleStartsSortedByDate: cycleDaysSortedByDate.filter(d => {
+          return cycleStarts.includes(d.date)
+        }),
         minCyclesForPrediction: 1
       })
       const result = getPredictedMenses()
@@ -445,6 +401,7 @@ describe('getPredictedMenses', () => {
       ]
       expect(result).to.eql(expectedResult)
     })
+
     it('if number of cycles is above minCyclesForPrediction', () => {
       const cycleDaysSortedByDate = [
         {
@@ -467,7 +424,8 @@ describe('getPredictedMenses', () => {
 
       const { getPredictedMenses } = cycleModule({
         cycleDaysSortedByDate,
-        bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
+        cycleStartsSortedByDate: cycleDaysSortedByDate,
+        minCyclesForPrediction: 1
       })
       const result = getPredictedMenses()
       const expectedResult = [
@@ -489,6 +447,7 @@ describe('getPredictedMenses', () => {
       ]
       expect(result).to.eql(expectedResult)
     })
+
     it('3 cycles with little standard deviation', () => {
       const cycleDaysSortedByDate = [
         {
@@ -511,7 +470,7 @@ describe('getPredictedMenses', () => {
 
       const { getPredictedMenses } = cycleModule({
         cycleDaysSortedByDate,
-        bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
+        cycleStartsSortedByDate: cycleDaysSortedByDate
       })
       const result = getPredictedMenses()
       const expectedResult = [
@@ -533,6 +492,7 @@ describe('getPredictedMenses', () => {
       ]
       expect(result).to.eql(expectedResult)
     })
+
     it('3 cycles with bigger standard deviation', () => {
       const cycleDaysSortedByDate = [
         {
@@ -555,7 +515,7 @@ describe('getPredictedMenses', () => {
 
       const { getPredictedMenses } = cycleModule({
         cycleDaysSortedByDate,
-        bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
+        cycleStartsSortedByDate: cycleDaysSortedByDate
       })
       const result = getPredictedMenses()
       const expectedResult = [
@@ -586,107 +546,6 @@ describe('getPredictedMenses', () => {
   })
 })
 
-describe('getAllMensesStart', () => {
-  it('works for one cycle start', () => {
-    const cycleDaysSortedByDate = [
-      {
-        date: '2018-05-01',
-        bleeding: { value: 1 }
-      }
-    ]
-
-    const { getAllMensesStarts } = cycleModule({
-      cycleDaysSortedByDate,
-      bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
-    })
-    const result = getAllMensesStarts()
-    expect(result.length).to.eql(1)
-    expect(result).to.eql(['2018-05-01'])
-  }),
-  it('works for two cycle starts', () => {
-    const cycleDaysSortedByDate = [
-      {
-        date: '2018-06-02',
-        bleeding: { value: 2 }
-      },
-      {
-        date: '2018-06-01',
-        bleeding: { value: 2 }
-      },
-      {
-        date: '2018-05-01',
-        bleeding: { value: 2 }
-      }
-    ]
-
-    const { getAllMensesStarts } = cycleModule({
-      cycleDaysSortedByDate,
-      bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
-    })
-    const result = getAllMensesStarts()
-    expect(result.length).to.eql(2)
-    expect(result).to.eql(['2018-06-01', '2018-05-01'])
-  })
-
-  it('works for two cycle starts with excluded data', () => {
-    const cycleDaysSortedByDate = [
-      {
-        date: '2018-06-01',
-        bleeding: { value: 2 }
-      },
-      {
-        date: '2018-05-01',
-        bleeding: { value: 2 }
-      },
-      {
-        date: '2018-04-31',
-        bleeding: { value: 2 , exclude: true}
-      },
-    ]
-
-    const { getAllMensesStarts } = cycleModule({
-      cycleDaysSortedByDate,
-      bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
-    })
-    const result = getAllMensesStarts()
-    expect(result.length).to.eql(2)
-    expect(result).to.eql(['2018-06-01', '2018-05-01'])
-  })
-
-  it('returns an empty array if no bleeding days are given', () => {
-    const cycleDaysSortedByDate = [ {} ]
-
-    const { getAllMensesStarts } = cycleModule({
-      cycleDaysSortedByDate,
-      bleedingDaysSortedByDate: cycleDaysSortedByDate.filter(d => d.bleeding)
-    })
-    const result = getAllMensesStarts()
-    expect(result.length).to.eql(0)
-    expect(result).to.eql([])
-  })
-
-  it('is not slow with 500 menses starts', () => {
-    const startDate = LocalDate.parse('2018-10-01')
-    const cycleDaysSortedByDate = Array(500)
-      .fill(null)
-      .map((_, i) => {
-        return {
-          date: startDate.minusMonths(i).toString(),
-          bleeding: { value: 2 }
-        }
-      })
-    const { getAllMensesStarts } = cycleModule({
-      cycleDaysSortedByDate,
-      bleedingDaysSortedByDate: cycleDaysSortedByDate
-    })
-    const start = Date.now()
-    const result = getAllMensesStarts()
-    const duration = Date.now() - start
-    expect(result.length).to.eql(500)
-    expect(duration).to.be.lessThan(100)
-  })
-})
-
 describe('isMensesStart', () => {
   it('works for simple menses start', () => {
     const cycleDaysSortedByDate = [
@@ -827,6 +686,51 @@ describe('isMensesStart', () => {
     const start = isMensesStart(cycleDaysSortedByDate[2])
     expect(start).to.be.true()
   })
+  describe('with cycle thresholds', () => {
+    const maxBreakInBleeding = 3
+
+    it('disregards bleeding breaks equal to max allowed bleeding break in a bleeding period', () => {
+      const bleedingDays = [{
+        date: '2018-05-14',
+        bleeding: {
+          value: 2
+        }
+      }, {
+        date: '2018-05-10',
+        bleeding: {
+          value: 2
+        }
+      }]
+
+      const isMensesStart = cycleModule({
+        bleedingDaysSortedByDate: bleedingDays,
+        maxBreakInBleeding
+      }).isMensesStart
+      const result = isMensesStart(bleedingDays[0])
+      expect(result).to.be.false()
+    })
+
+    it('counts bleeding breaks longer than maxAllowedBleedingBreak in a bleeding period', () => {
+      const bleedingDays = [{
+        date: '2018-05-14',
+        bleeding: {
+          value: 2
+        }
+      }, {
+        date: '2018-05-09',
+        bleeding: {
+          value: 2
+        }
+      }]
+
+      const isMensesStart = cycleModule({
+        bleedingDaysSortedByDate: bleedingDays,
+        maxBreakInBleeding
+      }).isMensesStart
+      const result = isMensesStart(bleedingDays[0])
+      expect(result).to.be.true()
+    })
+  })
 })
 
 describe('getMensesDaysAfter', () => {
@@ -999,4 +903,49 @@ describe('getMensesDaysAfter', () => {
       }
     ])
   })
+  describe('with cycle thresholds', () => {
+    const maxBreakInBleeding = 3
+
+    it('disregards bleeding breaks shorter than max allowed bleeding break in a bleeding period', () => {
+      const bleedingDays = [{
+        date: '2018-05-14',
+        bleeding: {
+          value: 2
+        }
+      }, {
+        date: '2018-05-10',
+        bleeding: {
+          value: 2
+        }
+      }]
+
+      const getMensesDaysAfter = cycleModule({
+        bleedingDaysSortedByDate: bleedingDays,
+        maxBreakInBleeding
+      }).getMensesDaysAfter
+      const result = getMensesDaysAfter(bleedingDays[1])
+      expect(result).to.eql([bleedingDays[0]])
+    })
+
+    it('counts bleeding breaks longer than maxAllowedBleedingBreak in a bleeding period', () => {
+      const bleedingDays = [{
+        date: '2018-05-14',
+        bleeding: {
+          value: 2
+        }
+      }, {
+        date: '2018-05-09',
+        bleeding: {
+          value: 2
+        }
+      }]
+
+      const getMensesDaysAfter = cycleModule({
+        bleedingDaysSortedByDate: bleedingDays,
+        maxBreakInBleeding
+      }).getMensesDaysAfter
+      const result = getMensesDaysAfter(bleedingDays[1])
+      expect(result).to.eql([])
+    })
+  })
 })