Throw if args are wrong

lib/sympto/index.js

@@ -4,7 +4,8 @@ import getPreOvulatoryPhase from './pre-ovulatory'
 import { LocalDate } from 'js-joda'
 
 export default function ({ cycle, previousCycle }) {
-  // TODO check for basic stuff, throw if nonexistent
+  throwIfArgsAreNotInRequiredFormat(cycle, previousCycle)
+
   const status = {
     assumeFertility: true,
     phases: {}
@@ -67,3 +68,25 @@ export default function ({ cycle, previousCycle }) {
 
   return status
 }
+
+function throwIfArgsAreNotInRequiredFormat(cycle, previousCycle) {
+  if (!Array.isArray(cycle) || !cycle.length) throw new Error('Please provide all cycle days as array')
+  if (!Array.isArray(previousCycle) || !previousCycle.length) throw new Error('Please provide previous cycle days as array')
+  if (
+    !cycle[0].bleeding || typeof cycle[0].bleeding.value != 'number' ||
+    !previousCycle[0].bleeding || typeof previousCycle[0].bleeding.value != 'number'
+  ) throw new Error('Cycle must start with bleeding')
+
+  if ([cycle, previousCycle].some(cycle => {
+    return cycle.some(day => {
+      if (!day.date) return true
+      try {
+        LocalDate.parse(day.date)
+      } catch(err) {
+        throw new Error('Please provide dates in ISO8601 format')
+      }
+      if (day.temperature && typeof day.temperature.value != 'number') return true
+      if (day.mucus && typeof day.mucus.value != 'number') return true
+    })
+  })) throw new Error('Cycle days are not in correct format')
+}

test/sympto/fixtures.js

@@ -10,10 +10,12 @@ function convertToSymptoFormat(val) {
 const cycleWithTempShift = [36.6, 36.6, 36.6, 36.6, 36.6, 36.6, 36.8, 36.8, 36.8]
   .map(num => ({ date: '2018-06-01', temperature: num }))
   .map(convertToSymptoFormat)
+cycleWithTempShift.unshift({date: '2018-05-30', bleeding: { value: 2 }})
 
 const cycleWithoutTempShift = [36.6, 36.6, 36.6, 36.6, 36.6, 36.6, 36.8, 36.8]
   .map(num => ({ date: '2018-06-01', temperature: num }))
   .map(convertToSymptoFormat)
+cycleWithoutTempShift.unshift({date: '2018-05-30', bleeding: { value: 2 }})
 
 const cycleWithTempAndMucusShift = [
   { date: '2018-06-01', temperature: 36.6, bleeding: 2 },

test/sympto/index.spec.js

@@ -7,7 +7,6 @@ import {
 const expect = chai.expect
 
 describe('sympto', () => {
-  describe('evaluating mucus and temperature shift together', () => {
   describe('with no previous higher measurement', () => {
     it('with no shifts detects only peri-ovulatory', function () {
       const status = getSensiplanStatus({
@@ -50,7 +49,6 @@ describe('sympto', () => {
       })
     })
   })
-  })
   describe('with previous higher measurement', () => {
     describe('with no shifts detects pre-ovulatory phase', function () {
       it('according to 5-day-rule', function () {
@@ -117,4 +115,61 @@ describe('sympto', () => {
 
     })
   })
+  describe('when args are wrong', () => {
+    it('throws when arg object is not in right format', () => {
+      const wrongObject = { hello: 'world' }
+      expect(() => getSensiplanStatus(wrongObject)).to.throw('cycle days as array')
+    })
+    it('throws if cycle array is empty', () => {
+      expect(() => getSensiplanStatus({cycle: []})).to.throw('cycle days as array')
+    })
+    it('throws if cycle days are not in right format', () => {
+      expect(() => getSensiplanStatus({
+        cycle: [{
+          hello: 'world',
+          bleeding: { value: 0 }
+        }],
+        previousCycle: [{
+          date: '1992-09-09',
+          bleeding: { value: 0 }
+        }]
+      })).to.throw('correct format')
+      expect(() => getSensiplanStatus({
+        cycle: [{
+          date: '2018-04-13',
+          temperature: {value: '35'},
+          bleeding: { value: 0 }
+        }],
+        previousCycle: [{
+          date: '1992-09-09',
+          bleeding: { value: 0 }
+        }]
+      })).to.throw('correct format')
+      expect(() => getSensiplanStatus({
+        cycle: [{
+          date: '09-14-2017',
+          bleeding: { value: 0 }
+        }],
+        previousCycle: [{
+          date: '1992-09-09',
+          bleeding: { value: 0 }
+        }]
+      })).to.throw('ISO')
+    })
+    it('throws if first cycle day does not have bleeding value', () => {
+      expect(() => getSensiplanStatus({
+        cycle: [{
+          date: '2017-01-01',
+          bleeding: {
+            value: 'medium'
+          }
+        }],
+        previousCycle: [
+          {
+            date: '2017-09-23',
+          }
+        ]
+      })).to.throw('start with bleeding')
+    })
+  })
 })