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

A farming game

import { COW_HUG_BENEFIT } from '../../constants.js'
import { generateCow } from '../../utils/index.js'
import { testState } from '../../test-utils/index.js'

import { hugCow } from './hugCow.js'

describe('hugCow', () => {
  describe('cow has not hit daily hug benefit limit', () => {
    test('increases cow happiness', () => {
      const cow = generateCow()
      const {
        cowInventory: [{ happiness, happinessBoostsToday }],
      } = hugCow(
        testState({
          cowInventory: [cow],
        }),
        cow.id
      )

      expect(happiness).toBe(COW_HUG_BENEFIT)
      expect(happinessBoostsToday).toBe(1)
    })

    describe('cow is at max happiness', () => {
      test('does not increase cow happiness', () => {
        const cow = generateCow({ happiness: 1 })
        const { cowInventory } = hugCow(
          testState({
            cowInventory: [cow],
          }),
          cow.id
        )

        expect(cowInventory[0].happiness).toBe(1)
      })
    })
  })

  describe('cow has hit daily hug benefit limit', () => {
    test('does not increase cow happiness', () => {
      const cow = generateCow({ happiness: 0.5, happinessBoostsToday: 3 })
      const {
        cowInventory: [{ happiness, happinessBoostsToday }],
      } = hugCow(
        testState({
          cowInventory: [cow],
        }),
        cow.id
      )

      expect(happiness).toBe(0.5)
      expect(happinessBoostsToday).toBe(3)
    })
  })
})