fix tests

tests/CMakeLists.txt

@@ -25,6 +25,7 @@ set(SETTINGS_TEST_SOURCES
 
     # Stubs that replace dependencies
     stubs/common_stub.cpp
+    stubs/core_stub.cpp
     stubs/scm_rev_stub.cpp
     stubs/sdl_stub.cpp
 

tests/stubs/core_stub.cpp

@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2026 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "emulator.h"
+
+namespace Core {
+
+Emulator::Emulator() {}
+Emulator::~Emulator() {}
+void Emulator::Shutdown() {}
+
+} // namespace Core