chore: add tests for templated image loader

test/ObjLoadingTests/Game/IW5/Image/ImageLoaderExternalIW5Test.cpp

@@ -0,0 +1,54 @@
+#include "Game/IW5/Image/ImageLoaderExternalIW5.h"
+
+#include "Game/IW5/GameIW5.h"
+#include "OatTestPaths.h"
+#include "SearchPath/MockSearchPath.h"
+#include "Utils/MemoryManager.h"
+
+#include <catch2/catch_test_macros.hpp>
+#include <filesystem>
+#include <fstream>
+#include <memory>
+#include <string>
+
+namespace fs = std::filesystem;
+using namespace IW5;
+using namespace std::literals;
+
+namespace
+{
+    TEST_CASE("ImageLoaderExternalIW5: Can parse iwi", "[iw5][image]")
+    {
+        MockSearchPath searchPath;
+
+        const auto filePath = oat::paths::GetTestDirectory() / "ObjLoadingTests/Game/IW5/Image/TestImage.iwi";
+        const auto fileSize = fs::file_size(filePath);
+
+        std::ifstream file(filePath, std::ios::binary);
+        REQUIRE(file.is_open());
+
+        const auto data = std::make_unique<char[]>(fileSize);
+        file.read(data.get(), fileSize);
+
+        searchPath.AddFileData("images/testimage.iwi", std::string(data.get(), fileSize));
+
+        Zone zone("MockZone", 0, GameId::IW5, GamePlatform::PC);
+
+        MemoryManager memory;
+        AssetCreatorCollection creatorCollection(zone);
+        IgnoredAssetLookup ignoredAssetLookup;
+        AssetCreationContext context(zone, &creatorCollection, &ignoredAssetLookup);
+
+        auto loader = image::CreateLoaderExternalIW5(memory, searchPath);
+        auto result = loader->CreateAsset("testimage", context);
+        REQUIRE(result.HasBeenSuccessful());
+
+        const auto* assetInfo = reinterpret_cast<XAssetInfo<GfxImage>*>(result.GetAssetInfo());
+        const auto* image = assetInfo->Asset();
+
+        REQUIRE(image->name == "testimage"s);
+        REQUIRE(image->width == 64);
+        REQUIRE(image->height == 64);
+        REQUIRE(image->depth == 1);
+    }
+} // namespace