more Sparkle tests

Sources/ViewModels/SparkleUpdater.swift

@@ -4,15 +4,16 @@ import OSLog
 
 @MainActor
 final class SparkleUpdater: NSObject, ObservableObject {
-    let controller: SPUStandardUpdaterController
+    private lazy var controller: SPUStandardUpdaterController = {
+        SPUStandardUpdaterController(startingUpdater: true, updaterDelegate: self, userDriverDelegate: nil)
+    }()
     private let logger = Logger(subsystem: "net.24unix.iKeyMon", category: "Sparkle")
     private let verboseLogging: Bool
 
     override init() {
         self.verboseLogging = ProcessInfo.processInfo.environment["SPARKLE_VERBOSE_LOGGING"] == "1"
-        self.controller = SPUStandardUpdaterController(startingUpdater: true, updaterDelegate: nil, userDriverDelegate: nil)
         super.init()
-        controller.updater.delegate = self
+        _ = controller
         log("Sparkle updater initialized (verbose=\(verboseLogging)).")
     }
 
@@ -46,12 +47,13 @@ final class SparkleUpdater: NSObject, ObservableObject {
     }
 
     private func describe(update item: SUAppcastItem) -> String {
-        let short = item.displayVersionString ?? item.versionString ?? "unknown"
-        let build = item.versionString ?? "?"
+        let short = item.displayVersionString
+        let build = item.versionString
         return "\(short) (build \(build))"
     }
 }
 
+@MainActor
 extension SparkleUpdater: SPUUpdaterDelegate {
     func updater(_ updater: SPUUpdater, didFinishLoading appcast: SUAppcast) {
         log("Loaded Sparkle appcast containing \(appcast.items.count) item(s).")