package economics

import (
	"encoding/json"
	"strings"
	"testing"
)

// TestManualBillMarshalsWithoutPulledAt: a SourceManual bill never sets
// PulledAt, and encoding/json's omitempty does NOT treat a zero time.Time as
// empty — omitzero does. A manual bill that marshalled a pulled_at key would
// lie: "0001-01-01T00:00:00Z" reads as a real pull that never happened.
func TestManualBillMarshalsWithoutPulledAt(t *testing.T) {
	b := Bill{
		Schema:   1,
		Month:    "2026-08",
		TotalUSD: 42.5,
		Services: map[string]float64{"AmazonEC2": 42.5},
		Source:   SourceManual,
	}
	raw, err := json.Marshal(b)
	if err != nil {
		t.Fatal(err)
	}
	if strings.Contains(string(raw), "pulled_at") {
		t.Fatalf("manual bill marshalled a pulled_at key: %s", raw)
	}
}