import * as Calculators from '../calculators'
import { BusinessExceptionError } from '../../../errors/business_exception.error'
import { CompetitionCategories } from '../../../models/ranking/competition/enums/categories.enum'

import { CalculatorFactory } from './calculator.factory'

describe('CalculatorFactory', () => {
  describe('#build', () => {
    describe.each`
      category                                        | calculator
      ${CompetitionCategories.DECREASE_BODY_FAT}      | ${Calculators.DecreaseBodyFatCalculator}
      ${CompetitionCategories.DECREASE_VISCERAL_FAT}  | ${Calculators.DecreaseVisceralFatCalculator}
      ${CompetitionCategories.INCREASE_LEAN_MASS}     | ${Calculators.IncreaseLeanMassCalculator}
      ${CompetitionCategories.DECREASE_ACTUAL_WEIGHT} | ${Calculators.DecreaseActualWeightCalculator}
    `('when category is "$category"', ({ category, calculator }) => {
      it(`returns ${calculator.name} class`, () => {
        expect(CalculatorFactory.build(category)).toEqual(calculator)
      })
    })

    describe('when the category is unknown', () => {
      it('throws an error', () => {
        expect(() => CalculatorFactory.build('asd' as CompetitionCategories)).toThrowError(BusinessExceptionError)
      })
    })

    describe('when the category is empty', () => {
      it('throws an error', () => {
        expect(() => CalculatorFactory.build('' as CompetitionCategories)).toThrowError(BusinessExceptionError)
      })
    })
  })
})