66 lines
2.7 KiB
Go
66 lines
2.7 KiB
Go
 
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package processor
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import (
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"testing"
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"github.com/google/uuid"
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"github.com/stretchr/testify/assert"
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"apskel-pos-be/internal/entities"
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)
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func gameEvent(multiplier *float64, bonus *int64) entities.GameEvent {
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return entities.GameEvent{ID: uuid.New(), BudgetID: uuid.New(), Multiplier: multiplier, Bonus: bonus}
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}
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func amounts(parts []gameRewardComponent) []int64 {
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out := make([]int64, 0, len(parts))
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for _, p := range parts {
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out = append(out, p.Amount)
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}
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return out
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}
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// PRD §7, §14, §16 with the default stacking rules.
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func TestRewardComponents(t *testing.T) {
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ramadan := gameEvent(ptr(2.0), nil)
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parts, capped := rewardComponents(10, 0, []entities.GameEvent{ramadan})
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assert.False(t, capped)
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assert.Equal(t, []int64{10, 10}, amounts(parts), "10 Coin + Ramadan 2x: 10 from the global budget, 10 from the event's")
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assert.Equal(t, gameRewardKindBase, parts[0].Kind)
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assert.Equal(t, gameRewardKindEvent, parts[1].Kind)
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assert.Equal(t, ramadan.BudgetID, parts[1].BudgetID)
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assert.Equal(t, ramadan.ID, *parts[1].EventID)
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// Each event works on the base: 2x and 1.5x add 10 and 5, they do not compound.
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// Bonuses are counted on their own.
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parts, _ = rewardComponents(10, 0, []entities.GameEvent{gameEvent(ptr(2.0), nil), gameEvent(ptr(1.5), ptr(int64(3))), gameEvent(nil, ptr(int64(5)))})
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assert.Equal(t, []int64{10, 10, 8, 5}, amounts(parts))
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// Rounded down to whole EnakCoin.
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parts, _ = rewardComponents(3, 0, []entities.GameEvent{gameEvent(ptr(1.5), nil), gameEvent(ptr(1.33), nil)})
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assert.Equal(t, []int64{3, 1}, amounts(parts), "1.5 adds 1.5 → 1; 1.33 adds 0.99 → 0 and is left out")
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// The cap holds for the total, cutting the lowest priority event first.
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parts, capped = rewardComponents(10, 22, []entities.GameEvent{gameEvent(ptr(2.0), nil), gameEvent(nil, ptr(int64(5)))})
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assert.True(t, capped)
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assert.Equal(t, []int64{10, 10, 2}, amounts(parts))
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assert.Equal(t, []int64{10, 10, 5}, []int64{parts[0].Earned, parts[1].Earned, parts[2].Earned})
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parts, _ = rewardComponents(30, 20, []entities.GameEvent{gameEvent(ptr(2.0), nil)})
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assert.Equal(t, []int64{20, 0}, amounts(parts), "a base at the cap leaves events nothing")
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// Nothing earned, nothing added: a bonus needs a play that earned.
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parts, _ = rewardComponents(0, 0, []entities.GameEvent{gameEvent(nil, ptr(int64(5)))})
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assert.Empty(t, parts)
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// Events paid by the same budget pay one ledger row.
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shared := uuid.New()
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a, b := gameEvent(nil, ptr(int64(2))), gameEvent(nil, ptr(int64(3)))
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a.BudgetID, b.BudgetID = shared, shared
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parts, _ = rewardComponents(10, 0, []entities.GameEvent{a, b})
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parts[0].BudgetID = uuid.New()
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payments := paymentsByBudget(parts)
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assert.Len(t, payments, 2)
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assert.EqualValues(t, 5, payments[1].Amount)
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}
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