Testing MEDIUM

calculateAvg.js

const harry = [
  {
    name: 'Math',
    grade: 95
  },
  {
    name: 'Good Magic',
    grade: 100
  },
  {
    name: 'Bad Magic',
    grade: 100
  }
]

export const verifyByClass = (className, grade, grades) =>
  grades.find(givenClass => givenClass.name === className).grade >= grade

export const calculateAvg = candidate => {
  const sum = candidate.reduce(
    (accumulatedGrades, currentClass) => accumulatedGrades + currentClass.grade,
    0
  )
  return sum / candidate.length
}

export const verifyCandidate = candidate =>
  calculateAvg(candidate) >= 90 && verifyByClass('Math', 95, candidate)

const result = verifyCandidate(harry)

firstCase.js

const harry = {
  gradesAvg: 90
}

export const verifyCandidate = candidate => candidate.gradesAvg >= 90
const result = verifyCandidate(harry)

firstCase.spec.js

import {verifyCandidate} from './firstCase'

describe('University evaluation flow', ()=> {
    test('verifyCandidate', ()=> {
        const student = {
            gradesAvg: 80
        }
        expect(verifyCandidate(student)).toBeFalsy()
        
        stundent.gradesAvg = 90
        expect(verifyCandidate(student)).toBeTruthy()
    })
})