crossmate

A collaborative crossword app for iOS
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PeerPresenceGraceTests.swift (1405B)

      1 import Foundation
      2 import Testing
      3 
      4 @testable import Crossmate
      5 
      6 @Suite("PeerPresence grace")
      7 struct PeerPresenceGraceTests {
      8     private let now = Date(timeIntervalSince1970: 10_000)
      9 
     10     @Test("a live (future) lease is present")
     11     func futureLeaseIsPresent() {
     12         #expect(PeerPresence.isPresent(readAt: now.addingTimeInterval(600), asOf: now))
     13     }
     14 
     15     @Test("a lease lapsed within the grace still counts as present")
     16     func recentlyLapsedLeaseIsPresent() {
     17         let lapsed = now.addingTimeInterval(-(PeerPresence.presenceGrace - 5))
     18         #expect(PeerPresence.isPresent(readAt: lapsed, asOf: now))
     19     }
     20 
     21     @Test("a lease lapsed past the grace is absent")
     22     func longLapsedLeaseIsAbsent() {
     23         let lapsed = now.addingTimeInterval(-(PeerPresence.presenceGrace + 5))
     24         #expect(!PeerPresence.isPresent(readAt: lapsed, asOf: now))
     25     }
     26 
     27     @Test("no lease is absent")
     28     func noLeaseIsAbsent() {
     29         #expect(!PeerPresence.isPresent(readAt: nil, asOf: now))
     30     }
     31 
     32     @Test("the cutoff is the grace before now and agrees with isPresent")
     33     func cutoffMatchesGrace() {
     34         #expect(PeerPresence.presenceCutoff(asOf: now) == now.addingTimeInterval(-PeerPresence.presenceGrace))
     35         // A readAt exactly at the cutoff is not present (strictly greater wins).
     36         #expect(!PeerPresence.isPresent(readAt: PeerPresence.presenceCutoff(asOf: now), asOf: now))
     37     }
     38 }