Shaders now are managed by a manger that can do hot reloading and it also will detect a bad shader and use an ERROR shader so you know it's busted visually.

tests/shaders.cpp

@@ -0,0 +1,22 @@
+#include <catch2/catch_test_macros.hpp>
+#include <fmt/core.h>
+#include <string>
+#include "shaders.hpp"
+
+using namespace fmt;
+
+TEST_CASE("shader loading/init works", "[shaders]") {
+  shaders::init();
+
+  sf::Shader* ui_shader = shaders::get("ui_shader");
+  auto other_test = shaders::get("ui_shader");
+
+  REQUIRE(ui_shader != nullptr);
+  REQUIRE(ui_shader == other_test);
+
+  shaders::reload();
+
+  // auto after_reload = shaders::get("ui_shader");
+  // REQUIRE(ui_shader != after_reload);
+  // REQUIRE(other_test != after_reload);
+}