Source Code added

mobile/test/mock_http_override.dart

@@ -0,0 +1,58 @@
+import 'dart:io';
+
+import 'package:immich_mobile/widgets/common/transparent_image.dart';
+import 'package:mocktail/mocktail.dart';
+
+/// Mocks the http client to always return a transparent image for all the requests. Only useful in widget
+/// tests to return network images
+class MockHttpOverrides extends HttpOverrides {
+  @override
+  HttpClient createHttpClient(SecurityContext? context) {
+    final client = _MockHttpClient();
+    final request = _MockHttpClientRequest();
+    final response = _MockHttpClientResponse();
+    final headers = _MockHttpHeaders();
+
+    // Client mocks
+    when(() => client.autoUncompress).thenReturn(true);
+
+    // Request mocks
+    when(() => request.headers).thenAnswer((_) => headers);
+    when(() => request.close()).thenAnswer((_) => Future<HttpClientResponse>.value(response));
+
+    // Response mocks
+    when(() => response.statusCode).thenReturn(HttpStatus.ok);
+    when(() => response.compressionState).thenReturn(HttpClientResponseCompressionState.decompressed);
+    when(() => response.contentLength).thenAnswer((_) => kTransparentImage.length);
+    when(
+      () => response.listen(
+        captureAny(),
+        cancelOnError: captureAny(named: 'cancelOnError'),
+        onDone: captureAny(named: 'onDone'),
+        onError: captureAny(named: 'onError'),
+      ),
+    ).thenAnswer((invocation) {
+      final onData = invocation.positionalArguments[0] as void Function(List<int>);
+
+      final onDone = invocation.namedArguments[#onDone] as void Function();
+
+      final onError = invocation.namedArguments[#onError] as void Function(Object, [StackTrace]);
+
+      final cancelOnError = invocation.namedArguments[#cancelOnError] as bool;
+
+      return Stream<List<int>>.fromIterable([
+        kTransparentImage.toList(),
+      ]).listen(onData, onDone: onDone, onError: onError, cancelOnError: cancelOnError);
+    });
+
+    return client;
+  }
+}
+
+class _MockHttpClient extends Mock implements HttpClient {}
+
+class _MockHttpClientRequest extends Mock implements HttpClientRequest {}
+
+class _MockHttpClientResponse extends Mock implements HttpClientResponse {}
+
+class _MockHttpHeaders extends Mock implements HttpHeaders {}