Injectable UserDefaults to fix race condition in tests (#741)

bitchat/Services/GeohashBookmarksStore.swift

@@ -20,8 +20,11 @@ final class GeohashBookmarksStore: ObservableObject {
     private let geocoder = CLGeocoder()
     private var resolving: Set<String> = []
     #endif
+    
+    private let storage: UserDefaults
 
-    private init() {
+    init(storage: UserDefaults = .standard) {
+        self.storage = storage
         load()
     }
 
@@ -64,7 +67,7 @@ final class GeohashBookmarksStore: ObservableObject {
 
     // MARK: - Persistence
     private func load() {
-        guard let data = UserDefaults.standard.data(forKey: storeKey) else { return }
+        guard let data = storage.data(forKey: storeKey) else { return }
         if let arr = try? JSONDecoder().decode([String].self, from: data) {
             // Sanitize, normalize, dedupe while preserving order (first occurrence wins)
             var seen = Set<String>()
@@ -81,7 +84,7 @@ final class GeohashBookmarksStore: ObservableObject {
             membership = seen
         }
         // Load any saved names
-        if let namesData = UserDefaults.standard.data(forKey: namesStoreKey),
+        if let namesData = storage.data(forKey: namesStoreKey),
            let dict = try? JSONDecoder().decode([String: String].self, from: namesData) {
             bookmarkNames = dict
         }
@@ -89,13 +92,13 @@ final class GeohashBookmarksStore: ObservableObject {
 
     private func persist() {
         if let data = try? JSONEncoder().encode(bookmarks) {
-            UserDefaults.standard.set(data, forKey: storeKey)
+            storage.set(data, forKey: storeKey)
         }
     }
 
     private func persistNames() {
         if let data = try? JSONEncoder().encode(bookmarkNames) {
-            UserDefaults.standard.set(data, forKey: namesStoreKey)
+            storage.set(data, forKey: namesStoreKey)
         }
     }
 

bitchatTests/GeohashBookmarksStoreTests.swift

@@ -3,23 +3,25 @@ import XCTest
 
 final class GeohashBookmarksStoreTests: XCTestCase {
     let storeKey = "locationChannel.bookmarks"
+    var storage: UserDefaults!
+    var store: GeohashBookmarksStore!
 
     override func setUp() {
         super.setUp()
-        // Clear persisted state before each test
-        UserDefaults.standard.removeObject(forKey: storeKey)
-        GeohashBookmarksStore.shared._resetForTesting()
+        // Unique instance for each test to avoid race condition
+        storage = UserDefaults(suiteName: UUID().uuidString)
+        store = GeohashBookmarksStore(storage: storage!)
     }
 
     override func tearDown() {
-        // Clean after each test
-        UserDefaults.standard.removeObject(forKey: storeKey)
-        GeohashBookmarksStore.shared._resetForTesting()
+        storage.removeObject(forKey: storeKey)
+        store._resetForTesting()
+        store = nil
+        storage = nil
         super.tearDown()
     }
 
     func testToggleAndNormalize() {
-        let store = GeohashBookmarksStore.shared
         // Start clean
         XCTAssertTrue(store.bookmarks.isEmpty)
 
@@ -35,12 +37,11 @@ final class GeohashBookmarksStoreTests: XCTestCase {
     }
 
     func testPersistenceWritten() throws {
-        let store = GeohashBookmarksStore.shared
         store.toggle("ezs42")
         store.toggle("u4pruy")
 
         // Verify persisted JSON contains both (order not enforced here)
-        guard let data = UserDefaults.standard.data(forKey: storeKey) else {
+        guard let data = storage.data(forKey: storeKey) else {
             XCTFail("No persisted data found")
             return
         }