Prevent Database assertion failure in dependencies

DuckDuckGo/Preferences/Model/AutofillPreferences.swift

@@ -163,6 +163,12 @@ final class AutofillPreferences: AutofillPreferencesPersistor {
 
     private let injectedDependencyStore: StatisticsStore?
     private lazy var defaultDependencyStore: StatisticsStore = {
+#if DEBUG
+        // To prevent an assertion failure deep within dependencies in Database.makeDatabase
+        if [.unitTests, .xcPreviews].contains(NSApp.runType) {
+            return StubStatisticsStore()
+        }
+#endif
         return LocalStatisticsStore()
     }()
 

DuckDuckGo/Statistics/ATB/LocalStatisticsStore.swift

@@ -231,3 +231,23 @@ final class LocalStatisticsStore: StatisticsStore {
     }
 
 }
+
+#if DEBUG
+
+// For use in tests to avoid indirect access of Database.makeDatabase
+
+final class StubStatisticsStore: StatisticsStore {
+    var installDate: Date?
+    var atb: String?
+    var searchRetentionAtb: String?
+    var appRetentionAtb: String?
+    var variant: String?
+    var lastAppRetentionRequestDate: Date?
+
+    var waitlistUnlocked: Bool = false
+
+    var autoLockEnabled: Bool = false
+    var autoLockThreshold: String?
+}
+
+#endif