import XCTest
@testable import CalendarKit
final class CivilDateTests: XCTestCase {
 @MainActor func testNewEventStartsAtNineAcrossDST() {
  for day in ["2026-03-29", "2026-10-25"] {
   let date=ISO8601DateFormatter().date(from: day+"T12:00:00Z")!
   let model=CalendarModel(zone: "Europe/Dublin", date: date)
   XCTAssertEqual(model.newEvent().start_local, day+"T09:00")
  }
 }
 @MainActor func testGapCannotSilentlyBecomeToday() {
  let model=CalendarModel(zone: "Europe/Dublin")
  XCTAssertNil(model.parse("2026-03-29T01:30", allDay: false, zone: "Europe/Dublin"))
 }
 func testAllDayUsesOccurrenceCivilDatesAcrossZones() {
  var event=CalendarEvent(); event.all_day=true
  event.day_start="2026-09-12"; event.day_end="2026-09-13"
  event.start_local="2026-09-01"; event.end_local="2026-09-02" // recurrence master must not win
  event.tz="UTC"; event.start=1789171200; event.end=1789257600
  for zone in ["America/Los_Angeles", "Pacific/Kiritimati"] {
   var calendar=Calendar(identifier: .gregorian);calendar.timeZone=TimeZone(identifier: zone)!
   for day in [11,12,13] {
    let date=calendar.date(from: DateComponents(year:2026,month:9,day:day,hour:12))!
    XCTAssertEqual(event.occurs(on:date,calendar:calendar),day==12)
   }
  }
 }
}