XCEngine/tests/Resources/Texture/test_texture_loader.cpp

#include <gtest/gtest.h>
#include <XCEngine/Resources/Texture/TextureLoader.h>
#include <XCEngine/Core/Asset/ResourceTypes.h>
#include <XCEngine/Core/Containers/Array.h>
#include <filesystem>

using namespace XCEngine::Resources;
using namespace XCEngine::Containers;

namespace {

std::string GetTextureFixturePath(const char* fileName) {
    return (std::filesystem::path(XCENGINE_TEST_FIXTURES_DIR) / "Resources" / "Texture" / fileName).string();
}

TEST(TextureLoader, GetResourceType) {
    TextureLoader loader;
    EXPECT_EQ(loader.GetResourceType(), ResourceType::Texture);
}

TEST(TextureLoader, GetSupportedExtensions) {
    TextureLoader loader;
    auto extensions = loader.GetSupportedExtensions();
    EXPECT_GE(extensions.Size(), 1u);
}

TEST(TextureLoader, CanLoad) {
    TextureLoader loader;
    EXPECT_TRUE(loader.CanLoad("test.png"));
    EXPECT_TRUE(loader.CanLoad("test.jpg"));
    EXPECT_TRUE(loader.CanLoad("test.tga"));
    EXPECT_FALSE(loader.CanLoad("test.txt"));
    EXPECT_FALSE(loader.CanLoad("test.obj"));
}

TEST(TextureLoader, LoadInvalidPath) {
    TextureLoader loader;
    LoadResult result = loader.Load("invalid/path/texture.png");
    EXPECT_FALSE(result);
}

TEST(TextureLoader, LoadValidBmpTexture) {
    TextureLoader loader;
    const std::string path = GetTextureFixturePath("checker.bmp");

    LoadResult result = loader.Load(path.c_str());
    ASSERT_TRUE(result);
    ASSERT_NE(result.resource, nullptr);

    auto* texture = static_cast<Texture*>(result.resource);
    EXPECT_EQ(texture->GetWidth(), 2u);
    EXPECT_EQ(texture->GetHeight(), 2u);
    EXPECT_EQ(texture->GetTextureType(), TextureType::Texture2D);
    EXPECT_EQ(texture->GetFormat(), TextureFormat::RGBA8_UNORM);
    EXPECT_EQ(texture->GetPixelDataSize(), 16u);

    delete texture;
}

} // namespace