Fix assert for bleeding value === null

lib/sympto/index.js

@@ -5,7 +5,7 @@ import { LocalDate } from 'js-joda'
 import assert from 'assert'
 
 export default function getSymptoThermalStatus({ cycle, previousCycles = [] }) {
-  throwIfArgsAreNotInRequiredFormat(cycle, previousCycles)
+  throwIfArgsAreNotInRequiredFormat([cycle, ...previousCycles])
 
   const status = {
     assumeFertility: true,
@@ -14,6 +14,7 @@ export default function getSymptoThermalStatus({ cycle, previousCycles = [] }) {
 
   // if there was no first higher measurement in the previous cycle,
   // no infertile pre-ovulatory phase may be assumed
+  if (previousCycles) {
     const lastCycle = previousCycles[previousCycles.length - 1]
     if (lastCycle && getSymptoThermalStatus({ cycle: lastCycle }).temperatureShift) {
       status.phases.preOvulatory = getPreOvulatoryPhase(cycle, previousCycles)
@@ -22,6 +23,7 @@ export default function getSymptoThermalStatus({ cycle, previousCycles = [] }) {
         return status
       }
     }
+  }
 
   status.phases.periOvulatory = {
     start: { date: null },
@@ -71,11 +73,11 @@ export default function getSymptoThermalStatus({ cycle, previousCycles = [] }) {
   return status
 }
 
-function throwIfArgsAreNotInRequiredFormat(cycle, previousCycles) {
-  [cycle, ...previousCycles].forEach(cycle => {
+function throwIfArgsAreNotInRequiredFormat(cycles) {
+  cycles.forEach(cycle => {
     assert.ok(Array.isArray(cycle))
-    // TODO handle case of no previous cycles
     assert.ok(cycle.length > 0)
+    assert.ok(cycle[0].bleeding !== null)
     assert.equal(typeof cycle[0].bleeding, 'object')
     assert.equal(typeof cycle[0].bleeding.value, 'number')
     cycle.forEach(day => {