apskel-pos-backend/internal/models/loyalty_test.go

package models

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestLoyaltyCashbackPercent(t *testing.T) {
	assert.Equal(t, 1.0, LoyaltyCashbackPercent(1, 1, 100))
	assert.Equal(t, 0.1, LoyaltyCashbackPercent(1, 1, 1000))
	assert.Equal(t, 0.33, LoyaltyCashbackPercent(1, 1, 300), "rounded to two decimals")
	assert.Equal(t, 0.67, LoyaltyCashbackPercent(2, 1, 300), "rounded, not cut")
	assert.Equal(t, 0.0, LoyaltyCashbackPercent(1, 1, 0))
}

func TestLoyaltyEarnSettings_CashbackPercent(t *testing.T) {
	s := LoyaltyEarnSettings{EarnMode: "PER_AMOUNT", EarnPerAmount: 100, EarnValue: 1, EarnPercent: 2.5}
	assert.Equal(t, 1.0, s.CashbackPercent(1))
	s.EarnMode = "PERCENTAGE"
	assert.Equal(t, 2.5, s.CashbackPercent(1))
	assert.Equal(t, 250.0, s.CashbackPercent(100), "each point earned is worth point_value rupiah")
}

func TestNewLoyaltySettingsImpact(t *testing.T) {
	before := OrganizationLoyaltySettings{PointValue: 1, Exchange: LoyaltyExchangeSettings{CoinAmount: 1, PointAmount: 1}}
	after := OrganizationLoyaltySettings{PointValue: 100, Exchange: LoyaltyExchangeSettings{CoinAmount: 10, PointAmount: 1}}

	got := NewLoyaltySettingsImpact(50000, 105, before, after)
	assert.Equal(t, LoyaltySettingsImpact{
		OutstandingPoints: 50000, OutstandingCoins: 105,
		PointValueBefore: 1, PointValueAfter: 100,
		PointRupiahBefore: 50000, PointRupiahAfter: 5000000,
		CoinsAsPointsBefore: 105, CoinsAsPointsAfter: 10, // floor(105 / 10)
		CoinRupiahBefore: 105, CoinRupiahAfter: 1000,
	}, got)

	same := NewLoyaltySettingsImpact(10, 10, before, before)
	assert.Equal(t, same.PointRupiahBefore, same.PointRupiahAfter)
}