Accept previousCycles as array

lib/sympto/index.js

@@ -4,18 +4,20 @@ import getPreOvulatoryPhase from './pre-ovulatory'
 import { LocalDate } from 'js-joda'
 import assert from 'assert'
 
-export default function ({ cycle, previousCycle }) {
-  throwIfArgsAreNotInRequiredFormat(cycle, previousCycle)
+export default function ({ cycle, previousCycles = [] }) {
+  throwIfArgsAreNotInRequiredFormat(cycle, previousCycles)
 
   const status = {
     assumeFertility: true,
     phases: {}
   }
+  // TODO handle no previous cycles
 
   // if there was no first higher measurement in the previous cycle,
   // no infertile pre-ovulatory phase may be assumed
-  if (getTemperatureShift(previousCycle).detected && !cycle[0].mucus) {
-    status.phases.preOvulatory = getPreOvulatoryPhase(cycle)
+  const lastCycle = previousCycles[previousCycles.length - 1]
+  if (getTemperatureShift(lastCycle).detected && !cycle[0].mucus) {
+    status.phases.preOvulatory = getPreOvulatoryPhase(cycle, previousCycles)
     if (status.phases.preOvulatory.cycleDays.length === cycle.length) {
       status.assumeFertility = false
       return status
@@ -70,9 +72,10 @@ export default function ({ cycle, previousCycle }) {
   return status
 }
 
-function throwIfArgsAreNotInRequiredFormat(cycle, previousCycle) {
-  [cycle, previousCycle].forEach(cycle => {
+function throwIfArgsAreNotInRequiredFormat(cycle, previousCycles) {
+  [cycle, ...previousCycles].forEach(cycle => {
     assert.ok(Array.isArray(cycle))
+    // TODO handle case of no previous cycles
     assert.ok(cycle.length > 0)
     assert.equal(typeof cycle[0].bleeding, 'object')
     assert.equal(typeof cycle[0].bleeding.value, 'number')
@@ -81,6 +84,8 @@ function throwIfArgsAreNotInRequiredFormat(cycle, previousCycle) {
       assert.doesNotThrow(() => LocalDate.parse(day.date))
       if (day.temperature) assert.equal(typeof day.temperature.value, 'number')
       if (day.mucus) assert.equal(typeof day.mucus.value, 'number')
+      if (day.mucus) assert.ok(day.mucus.value >= 0)
+      if (day.mucus) assert.ok(day.mucus.value < 5)
     })
   })
 }