[CI] Use local images instead of remote ones for snapshot tests

Author: testableapple

StreamChatSwiftUITests/Infrastructure/Mocks/ImageLoader_Mock.swift

@@ -6,6 +6,7 @@ import Foundation
 @testable import StreamChat
 import StreamChatSwiftUI
 import UIKit
+import XCTest
 
 class ImageLoader_Mock: ImageLoading {
     static let defaultLoadedImage = UIImage(systemName: "checkmark")!
@@ -17,7 +18,14 @@ class ImageLoader_Mock: ImageLoading {
         preferredSize: CGSize?,
         completion: @escaping ((Result<UIImage, Error>) -> Void)
     ) {
-        completion(.success(Self.defaultLoadedImage))
+        // Check if this is a test URL and return appropriate test image
+        if let url = url, url.scheme == "test" {
+            let testImage = getTestImage(for: url)
+            completion(.success(testImage))
+        } else {
+            // For non-test URLs, return a default test image
+            completion(.success(Self.defaultLoadedImage))
+        }
     }
 
     func loadImages(
@@ -28,9 +36,31 @@ class ImageLoader_Mock: ImageLoading {
         imageCDN: ImageCDN,
         completion: @escaping (([UIImage]) -> Void)
     ) {
-        let result = urls.map { _ in
-            Self.defaultLoadedImage
+        let result = urls.map { url in
+            if url.scheme == "test" {
+                return getTestImage(for: url)
+            } else {
+                return Self.defaultLoadedImage
+            }
         }
         completion(result)
     }
+
+    // MARK: - Private methods
+
+    private func getTestImage(for url: URL) -> UIImage {
+        // Extract filename from test URL by removing the scheme
+        let urlString = url.absoluteString
+        let filename = urlString.replacingOccurrences(of: "test://", with: "").lowercased()
+
+        if filename.contains("chewbacca") {
+            return XCTestCase.TestImages.chewbacca.image
+        } else if filename.contains("r2") {
+            return XCTestCase.TestImages.r2.image
+        } else if filename.contains("vader") {
+            return XCTestCase.TestImages.vader.image
+        } else {
+            return XCTestCase.TestImages.yoda.image
+        }
+    }
 }

StreamChatSwiftUITests/Infrastructure/Shared/TemporaryData.swift

@@ -24,6 +24,27 @@ extension URL {
         try! FileManager.default.createDirectory(at: newDirURL, withIntermediateDirectories: true, attributes: nil)
         return newDirURL
     }
+    
+    /// The following functions return the test URLs that will be handled by our mock image loader
+    static var localYodaImage: URL {
+        URL(string: "test://yoda.jpg")!
+    }
+    
+    static var localChewbaccaImage: URL {
+        URL(string: "test://chewbacca.jpg")!
+    }
+    
+    static var localR2Image: URL {
+        URL(string: "test://r2.jpg")!
+    }
+    
+    static var localVaderImage: URL {
+        URL(string: "test://vader.jpg")!
+    }
+    
+    static var localLukeImage: URL {
+        URL(string: "test://luke.jpg")!
+    }
 }
 
 extension String {

StreamChatSwiftUITests/Tests/ChatChannel/ChatChannelTestHelpers.swift

@@ -41,8 +41,8 @@ class ChatChannelTestHelpers {
         channelController.simulateInitial(channel: channel, messages: channelMessages, state: .initialized)
         return channelController
     }
-
-    static let testURL = URL(string: "https://vignette.wikia.nocookie.net/starwars/images/2/20/LukeTLJ.jpg")!
+    
+    static let testURL = URL.localYodaImage
 
     static var imageAttachments: [AnyChatMessageAttachment] = {
         let attachmentFile = AttachmentFile(type: .png, size: 0, mimeType: "image/png")
@@ -225,8 +225,8 @@ class ChatChannelTestHelpers {
             let title = index == 0 ? "Recording" : "Recording-\(index)"
             let payload = VoiceRecordingAttachmentPayload(
                 title: title,
-                voiceRecordingRemoteURL: .localYodaImage,
-                file: try! .init(url: .localYodaImage),
+                voiceRecordingRemoteURL: testURL,
+                file: try! .init(url: testURL),
                 duration: Double(index) + 5.0,
                 waveformData: [0, 0.1, 0.5, 1],
                 extraData: nil

StreamChatSwiftUITests/Tests/ChatChannel/LazyImageExtensions_Tests.swift

@@ -23,7 +23,7 @@ final class LazyImageExtensions_Tests: StreamChatTestCase {
     func test_imageURL_nonEmpty() {
         // Given
         let lazyImageView = LazyImage(
-            imageURL: URL(string: "https://vignette.wikia.nocookie.net/starwars/images/2/20/LukeTLJ.jpg")
+            imageURL: .localYodaImage
         )
         .applyDefaultSize()
 

StreamChatSwiftUITests/Tests/StreamChatTestCase.swift

@@ -22,7 +22,7 @@ open class StreamChatTestCase: XCTestCase {
 
     override open func setUp() {
         super.setUp()
-        streamChat = StreamChat(chatClient: chatClient)
+        streamChat = StreamChat(chatClient: chatClient, utils: Utils(imageLoader: ImageLoader_Mock()))
     }
 
     func adjustAppearance(_ block: (inout Appearance) -> Void) {