Minoka's eventstream puzzler draft

src/index.test.ts

@@ -1,7 +1,91 @@
-//write tests here
+import {
+  firstMockEventStream,
+  secondMockEventStream,
+  thirdMockEventStream,
+  fourthMockEventStream,
+  firstMockRegion,
+  secondMockRegion,
+} from './mockEventStream'
+import { getHighestScoringRegion, findRegionScore, scoreEvent } from "./index"
 
-describe('Tests will go here!', () => {
-  it('should pass', () => {
-    expect(true).toBeTruthy()
+describe('ScoreEventStream', () => {
+
+  describe('getHighestScoringRegion', () => {
+
+    it('should return the first highest scoring region array when there is a tie', () => {
+      const firstHighestScoringRegion = getHighestScoringRegion(firstMockEventStream)
+      const firstExpected = [
+        { timestamp: 123123125, eventType: 'new message' },
+        { timestamp: 123123125, eventType: 'view' },
+        { timestamp: 123123125, eventType: 'view' },
+        { timestamp: 123123125, eventType: 'screenshot' },
+        { timestamp: 123123125, eventType: 'screenshot' },
+      ]
+      expect(firstHighestScoringRegion).toEqual(firstExpected)
+
+      const secondHighestScoringRegion = getHighestScoringRegion(thirdMockEventStream)
+      const secondExpected = [
+        { timestamp: 123123125, eventType: 'screenshot' },
+        { timestamp: 123123125, eventType: 'screenshot' },
+        { timestamp: 123123125, eventType: 'new message' },
+        { timestamp: 123123125, eventType: 'new message' },
+        { timestamp: 123123123, eventType: 'new message' },
+      ]
+      expect(secondHighestScoringRegion).toEqual(secondExpected)
+    })
+
+    it('should return the correct array regions if there is less then 5 in event stream', () => {
+      const highestScoringRegion = getHighestScoringRegion(secondMockEventStream)
+      const expected = [
+        { timestamp: 123123125, eventType: 'view' },
+        { timestamp: 123123125, eventType: 'screenshot' },
+        { timestamp: 123123125, eventType: 'screenshot' },
+      ]
+      expect(highestScoringRegion).toEqual(expected)
+    })
+
+    it('should return the highest scoring region of given array ', () => {
+      const highestScoringRegion = getHighestScoringRegion(fourthMockEventStream)
+      const expected = [
+        { timestamp: 123123125, eventType: 'view' },
+        { timestamp: 123123124, eventType: 'screenshot' },
+        { timestamp: 123123125, eventType: 'new message' },
+        { timestamp: 123123125, eventType: 'view' },
+        { timestamp: 123123125, eventType: 'screenshot' },
+      ]
+      expect(highestScoringRegion).toEqual(expected)
+    })
+  })
+
+  describe('findRegionScore', () => {
+
+    it('should give the correct score for each region', () => {
+      const firstRegionScore = findRegionScore(firstMockRegion)
+      expect(firstRegionScore).toEqual(8)
+
+      const secondRegionScore = findRegionScore(secondMockRegion)
+      expect(secondRegionScore).toEqual(9)
+    })
+
+    it('should give the correct score for each region even if there is less then 5', () => {
+      const thirdRegionScore = findRegionScore(
+        [
+          { timestamp: 123123125, eventType: 'new message' },
+          { timestamp: 123123125, eventType: 'view' },
+          { timestamp: 123123125, eventType: 'screenshot' },
+        ])
+        expect(thirdRegionScore).toEqual(6)
+    })
+  })
+
+  describe('scoreEvent', () => {
+
+    it('return the correct score value from each event', () => {
+      expect(scoreEvent({ timestamp: 123123125, eventType: 'view' })).toEqual(2)
+
+      expect(scoreEvent({ timestamp: 123123125, eventType: 'screenshot' })).toEqual(3)
+
+      expect(scoreEvent({ timestamp: 123123125, eventType: 'new message' })).toEqual(1)
+    })
   })
-})
+})

src/index.ts

@@ -1 +1,40 @@
-//Define class/functions here
+//Define class/functions here
+export interface Event {
+  timestamp: number
+  eventType: 'screenshot' | 'view' | 'new message'
+}
+
+export const scoreEvent = (event: Event): number => {
+  const { eventType } = event
+  switch (eventType) {
+    case "new message":
+      return 1
+    case "view":
+      return 2
+    case "screenshot":
+      return 3
+    default:
+      return 0
+  }
+}
+
+export const findRegionScore = (eventStream: Array<Event>): number => {
+  const score = eventStream.reduce((acc, event) => {
+    return acc + scoreEvent(event)
+  }, 0)
+
+  return score
+}
+
+export const getHighestScoringRegion = (eventStream: Array<Event>): Array<Event> => {
+
+  const eventStreamScore: number[]= eventStream.reduce((acc, next, index): any => {
+    const eventRegion = eventStream.slice(index, index + 5)
+    return [...acc, findRegionScore(eventRegion) ] 
+  }, [])
+
+  const max: number = Math.max(...eventStreamScore)
+  const index: number = eventStreamScore.indexOf(max)
+
+  return eventStream.slice(index, index + 5)
+}

src/mockEventStream.ts

@@ -0,0 +1,209 @@
+import { Event } from "./index"
+export const firstMockEventStream: Array<Event> = [
+	{
+		timestamp: 123123123,
+		eventType: "new message",
+	},
+	{
+		timestamp: 123123124,
+		eventType: "new message",
+	},
+	{
+		timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+		timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+		timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+		timestamp: 123123125,
+		eventType: "screenshot",
+	},
+	{
+		timestamp: 123123125,
+		eventType: "screenshot",
+	},
+	{
+		timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+		timestamp: 123123125,
+		eventType: "new message",
+    },
+]
+export const secondMockEventStream: Array<Event> = [
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "screenshot",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "screenshot",
+	},
+]
+export const thirdMockEventStream: Array<Event> = [
+    {
+        timestamp: 123123125,
+		eventType: "screenshot",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "screenshot",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+    },
+    {
+        timestamp: 123123123,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123124,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "screenshot",
+	},
+] 
+export const fourthMockEventStream: Array<Event> = [
+    {
+        timestamp: 123123124,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+    },
+    {
+        timestamp: 123123124,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+    },
+    {
+        timestamp: 123123124,
+		eventType: "screenshot",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "screenshot",
+    },
+    {
+        timestamp: 123123124,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+]
+export const firstMockRegion: Array<Event> = [
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "screenshot",
+    },
+    {
+        timestamp: 123123124,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+]
+export const secondMockRegion: Array<Event> = [
+	{
+        timestamp: 123123125,
+		eventType: "screenshot",
+    },
+    {
+        timestamp: 123123124,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "new message",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+	{
+        timestamp: 123123125,
+		eventType: "view",
+	},
+]