feat: add package base prices

internal/repository/paket_test.go

@@ -1,6 +1,9 @@
 package repository
 
-import "testing"
+import (
+	"database/sql"
+	"testing"
+)
 
 func TestPaketListWhereParity(t *testing.T) {
 	where, args := paketListWhere(PaketListParams{
@@ -43,3 +46,51 @@ func TestLaravelDateJSONParity(t *testing.T) {
 		t.Fatalf("zero date=%q", actual)
 	}
 }
+
+func TestPaketItemBasePriceFallbackParity(t *testing.T) {
+	tests := []struct {
+		name          string
+		het           string
+		defaultPrice  float64
+		baseCost      float64
+		categoryID    int
+		medicine      sql.NullFloat64
+		setting       sql.NullFloat64
+		medicalSupply sql.NullFloat64
+		expected      float64
+	}{
+		{
+			name: "HET uses default price", het: "Y", defaultPrice: 1234.56,
+			expected: 1234.56,
+		},
+		{
+			name: "medicine uses tier margin", baseCost: 1000, categoryID: 1,
+			medicine: sql.NullFloat64{Float64: 12.5, Valid: true},
+			setting:  sql.NullFloat64{Float64: 20, Valid: true}, expected: 1125,
+		},
+		{
+			name: "medicine falls back to system setting", baseCost: 1000, categoryID: 1,
+			setting: sql.NullFloat64{Float64: 20, Valid: true}, expected: 1200,
+		},
+		{
+			name: "medical supply uses its margin", baseCost: 1000, categoryID: 2,
+			medicalSupply: sql.NullFloat64{Float64: 15, Valid: true}, expected: 1150,
+		},
+		{
+			name: "other category uses rounded default", defaultPrice: 1234.56,
+			categoryID: 3, expected: 1235,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			actual := paketItemBasePrice(
+				test.het, test.defaultPrice, test.baseCost, test.categoryID,
+				test.medicine, test.setting, test.medicalSupply,
+			)
+			if actual != test.expected {
+				t.Fatalf("base price=%v want=%v", actual, test.expected)
+			}
+		})
+	}
+}