Forgot a ton of files in the last commit.

tests/shaders.cpp

@@ -0,0 +1,26 @@
+#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();
+  int version = shaders::version();
+
+  std::shared_ptr<sf::Shader> ui_shader = shaders::get("ui_shader");
+  auto other_test = shaders::get("ui_shader");
+
+  REQUIRE(ui_shader != nullptr);
+  REQUIRE(ui_shader == other_test);
+  REQUIRE(shaders::updated(version) == false);
+
+  int new_version = shaders::reload();
+  REQUIRE(version != shaders::version());
+  REQUIRE(version != new_version);
+  REQUIRE(shaders::version() == new_version);
+  REQUIRE(shaders::updated(version) == true);
+  version = new_version;
+
+}