1 files changed, 76 insertions, 0 deletions
diff --git a/app/test/main.cc b/app/test/main.cc
new file mode 100644
index 0000000..3bb785f
--- /dev/null
+++ b/app/test/main.cc
@@ -0,0 +1,76 @@
+#include "nes/display.hh"
+#include "nes/nes.hh"
+#include "nes/util/rgb.hh"
+#include "nes/util/snapshot.hh"
+#include <iostream>
+
+namespace
+{
+	class dummy_display final : public nes::display
+	{
+		std::uint8_t buffer_a_[width * height * 3]{};
+		std::uint8_t buffer_b_[width * height * 3]{};
+		std::uint8_t* front_buffer_{ buffer_a_ };
+		std::uint8_t* back_buffer_{ buffer_b_ };
+
+	public:
+		explicit dummy_display() = default;
+
+		auto get(unsigned const x, unsigned const y) const -> nes::rgb override
+		{
+			auto const offset = ((y * width) + x) * 3;
+			return nes::rgb{ back_buffer_[offset + 0], back_buffer_[offset + 1], back_buffer_[offset + 2] };
+		}
+
+		auto set(unsigned const x, unsigned const y, nes::rgb const value) -> void override
+		{
+			auto const offset = ((y * width) + x) * 3;
+			back_buffer_[offset + 0] = value.r;
+			back_buffer_[offset + 1] = value.g;
+			back_buffer_[offset + 2] = value.b;
+		}
+
+		auto switch_buffers() -> void override
+		{
+			std::swap(front_buffer_, back_buffer_);
+		}
+	};
+} // namespace
+
+int main()
+{
+	auto const path = "/Users/hannes/Documents/temp/supermario.nes";
+
+	auto cartridge = nes::cartridge::from_file(path);
+	if (!cartridge.is_valid())
+	{
+		std::cerr << "Could not load cartridge!" << std::endl;
+		std::abort();
+	}
+
+	// Initialize the system to be tested.
+	auto display_a = std::make_unique<dummy_display>();
+	auto sys_a = nes::nes{ cartridge, *display_a };
+
+	// Initialize the (assumed to be working) reference implementation.
+	auto display_b = std::make_unique<dummy_display>();
+	auto sys_b = nes::nes{ cartridge, *display_b };
+
+	// Run.
+	while (true)
+	{
+		auto const status_a = sys_a.get_snapshot();
+		auto const status_b = sys_b.get_snapshot();
+
+		if (status_a != status_b)
+		{
+			std::cout << "Different snapshot!\n";
+			return 1;
+		}
+
+		std::cout << "Cycle: " << status_a.cpu_cycle.to_cpu() << ", " << status_b.cpu_cycle.to_cpu() << '\n';
+
+		sys_a.step_to_nmi();
+		sys_b.step_to_nmi();
+	}
+}
+\ No newline at end of file