@jeremyckahn/farmhand/src/game-logic/reducers/updateAchievements.test.js

A farming game

import { ACHIEVEMENT_COMPLETED } from '../../templates.js'

describe('updateAchievements', () => {
  let updateAchievements

  beforeAll(async () => {
    vitest.resetModules()
    vitest.mock('../../data/achievements.js', () => {
      return {
        default: [
          {
            id: 'test-achievement',
            name: 'Test Achievement',
            description: '',
            rewardDescription: '',
            condition: state => !state.conditionSatisfied,
            reward: state => ({ ...state, conditionSatisfied: true }),
          },
        ],
      }
    })

    updateAchievements = (await vitest.importActual('./updateAchievements.js'))
      .updateAchievements
  })

  describe('achievement was not previously met', () => {
    describe('condition is not met', () => {
      test('does not update state', () => {
        const inputState = {
          completedAchievements: {},
          conditionSatisfied: true,
          todaysNotifications: [],
        }

        const state = updateAchievements(inputState)

        expect(state).toBe(inputState)
      })
    })

    describe('condition is met', () => {
      test('updates state', () => {
        const inputState = {
          completedAchievements: {},
          conditionSatisfied: false,
          todaysNotifications: [],
        }

        const state = updateAchievements(inputState)

        expect(state).toMatchObject({
          completedAchievements: { 'test-achievement': true },
          conditionSatisfied: true,
          todaysNotifications: [
            {
              message: ACHIEVEMENT_COMPLETED('', {
                name: 'Test Achievement',
                rewardDescription: '',
              }),
              severity: 'success',
            },
          ],
        })
      })
    })
  })

  describe('achievement was previously met', () => {
    describe('condition is not met', () => {
      test('does not update state', () => {
        const inputState = {
          completedAchievements: { 'test-achievement': true },
          conditionSatisfied: true,
          todaysNotifications: [],
        }

        const state = updateAchievements(inputState)

        expect(state).toBe(inputState)
      })
    })

    describe('condition is met', () => {
      test('does not update state', () => {
        const inputState = {
          completedAchievements: { 'test-achievement': true },
          conditionSatisfied: false,
          todaysNotifications: [],
        }

        const state = updateAchievements(inputState)

        expect(state).toBe(inputState)
      })
    })
  })
})