package main

import "testing"

func TestLatestBackups(t *testing.T) {
	items := []BackupItem{
		{VMID: 100, CreatedAt: 10, Storage: "old"},
		{VMID: 100, CreatedAt: 20, Storage: "new"},
		{VMID: 101, CreatedAt: 15, Storage: "only"},
	}
	latest := latestBackups(items)
	if len(latest) != 2 || latest[0].Storage != "new" {
		t.Fatalf("неожиданный список последних копий: %+v", latest)
	}
	if latest[0].PreviousSizeBytes != 0 {
		t.Fatalf("unexpected previous size: %+v", latest[0])
	}
}

func TestLatestBackupsComparesSize(t *testing.T) {
	items := []BackupItem{{VMID: 100, CreatedAt: 20, SizeBytes: 120}, {VMID: 100, CreatedAt: 10, SizeBytes: 100}}
	latest := latestBackups(items)
	if len(latest) != 1 || latest[0].SizeChangePercent == nil || *latest[0].SizeChangePercent != 20 {
		t.Fatalf("unexpected comparison: %+v", latest)
	}
}