mcp in cart

2026-06-17 21:43:38 +02:00
parent ad410d217c
commit 74dc252279
9 changed files with 1054 additions and 13 deletions
@@ -0,0 +1,84 @@
+package promotions
+
+import (
+	"testing"
+	"time"
+
+	"git.k6n.net/mats/go-cart-actor/pkg/cart"
+)
+
+func timeZero() time.Time { return time.Date(2024, 6, 10, 12, 0, 0, 0, time.UTC) }
+
+// volymrabattRule mirrors the seeded data/promotions.json rule so the test
+// exercises the same tier configuration shipped to the cart service.
+func volymrabattRule() PromotionRule {
+	return PromotionRule{
+		ID:       "volymrabatt",
+		Name:     "Volymrabatt",
+		Status:   StatusActive,
+		Priority: 100,
+		Conditions: Conditions{
+			BaseCondition{ID: "min", Type: CondCartTotal, Operator: OpGreaterOrEqual, Value: cvNum(2000000)},
+		},
+		Actions: []Action{
+			{
+				ID:   "tiers",
+				Type: ActionTieredDiscount,
+				Config: map[string]interface{}{
+					"tiers": []interface{}{
+						map[string]interface{}{"minTotal": 2000000.0, "maxTotal": 4000000.0, "percent": 5.0},
+						map[string]interface{}{"minTotal": 4000000.0, "maxTotal": 6000000.0, "percent": 9.0},
+						map[string]interface{}{"minTotal": 6000000.0, "maxTotal": 9000000.0, "percent": 14.0},
+					},
+				},
+			},
+		},
+	}
+}
+
+// cartWithTotal builds a grain whose single line item produces the requested
+// gross (incl. 25% VAT) total in öre, then runs UpdateTotals.
+func cartWithTotal(incVat int64) *cart.CartGrain {
+	g := cart.NewCartGrain(1, timeZero())
+	g.Items = []*cart.CartItem{
+		{Id: 1, Sku: "SKU", Quantity: 1, Price: *cart.NewPriceFromIncVat(incVat, 25)},
+	}
+	g.UpdateTotals()
+	return g
+}
+
+func TestVolymrabattTiers(t *testing.T) {
+	svc := NewPromotionService(nil)
+	rules := []PromotionRule{volymrabattRule()}
+
+	cases := []struct {
+		name        string
+		total       int64
+		wantDiscount int64
+		wantNet      int64
+	}{
+		{"below threshold (19 999 kr)", 1999900, 0, 1999900},
+		{"low tier 5% (20 000 kr)", 2000000, 100000, 1900000},
+		{"low tier boundary just under 40 000", 3999900, 199995, 3799905},
+		{"mid tier 9% at 40 000 boundary", 4000000, 360000, 3640000},
+		{"mid tier 9% (50 000 kr)", 5000000, 450000, 4550000},
+		{"high tier 14% at 60 000 boundary", 6000000, 840000, 5160000},
+		{"high tier 14% (90 000 kr)", 9000000, 1260000, 7740000},
+		{"above top tier (100 000 kr) -> no discount", 10000000, 0, 10000000},
+	}
+
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			g := cartWithTotal(c.total)
+			_, actions := svc.EvaluateAll(rules, NewContextFromCart(g, WithNow(timeZero())))
+			ApplyActions(g, actions)
+
+			if got := g.TotalDiscount.IncVat; got != c.wantDiscount {
+				t.Errorf("discount = %d, want %d", got, c.wantDiscount)
+			}
+			if got := g.TotalPrice.IncVat; got != c.wantNet {
+				t.Errorf("net total = %d, want %d", got, c.wantNet)
+			}
+		})
+	}
+}