package processing

import "testing"

func TestFillMissingStandardFields(t *testing.T) {
	mapped := map[string]any{"title": "Widget"}
	raw := map[string]any{"ean": "1234567890123", "manufacturer": "Acme"}
	fields := []StandardFieldDef{
		{Key: "title", MappingHints: []string{"name"}},
		{Key: "gtin", MappingHints: []string{"ean", "upc"}},
		{Key: "brand", MappingHints: []string{"manufacturer"}},
		{Key: "currency", DefaultValue: "EUR"},
		{Key: "color", MappingHints: []string{"colour"}},
	}
	out := FillMissingStandardFields(mapped, raw, fields)
	if out["title"] != "Widget" {
		t.Fatalf("title=%v", out["title"])
	}
	if out["gtin"] != "1234567890123" {
		t.Fatalf("gtin=%v", out["gtin"])
	}
	if out["brand"] != "Acme" {
		t.Fatalf("brand=%v", out["brand"])
	}
	if out["currency"] != "EUR" {
		t.Fatalf("currency=%v", out["currency"])
	}
	if _, ok := out["color"]; ok {
		t.Fatalf("color should stay empty, got %v", out["color"])
	}
	if mapped["gtin"] != nil {
		t.Fatal("original mapped must not be mutated")
	}
}