Rework shader module unit tests

tests/Engine/Shader/ShaderUtils.cpp

@@ -0,0 +1,76 @@
+#include <Engine/Shader/ShaderUtils.hpp>
+#include <Nazara/Core/StringExt.hpp>
+#include <Nazara/Shader/GlslWriter.hpp>
+#include <Nazara/Shader/LangWriter.hpp>
+#include <Nazara/Shader/ShaderLangParser.hpp>
+#include <Nazara/Shader/SpirvPrinter.hpp>
+#include <Nazara/Shader/SpirvWriter.hpp>
+#include <catch2/catch.hpp>
+#include <spirv-tools/libspirv.hpp>
+
+void ExpectingGLSL(Nz::ShaderAst::Statement& shader, std::string_view expectedOutput)
+{
+	expectedOutput = Nz::Trim(expectedOutput);
+
+	Nz::GlslWriter writer;
+
+	SECTION("Generating GLSL")
+	{
+		std::string output = writer.Generate(shader);
+
+		INFO("full GLSL output:\n" << output << "\nexcepted output:\n" << expectedOutput);
+		REQUIRE(output.find(expectedOutput) != std::string::npos);
+	}
+}
+
+void ExpectingNZSL(Nz::ShaderAst::Statement& shader, std::string_view expectedOutput)
+{
+	expectedOutput = Nz::Trim(expectedOutput);
+
+	Nz::LangWriter writer;
+
+	SECTION("Generating NZSL")
+	{
+		std::string output = writer.Generate(shader);
+
+		INFO("full NZSL output:\n" << output << "\nexcepted output:\n" << expectedOutput);
+		REQUIRE(output.find(expectedOutput) != std::string::npos);
+
+		// validate NZSL by recompiling it
+		REQUIRE_NOTHROW(Nz::ShaderLang::Parse(output));
+	}
+}
+
+void ExpectingSpirV(Nz::ShaderAst::Statement& shader, std::string_view expectedOutput)
+{
+	expectedOutput = Nz::Trim(expectedOutput);
+
+	Nz::SpirvWriter writer;
+	Nz::SpirvPrinter printer;
+
+	Nz::SpirvPrinter::Settings settings;
+	settings.printHeader = false;
+	settings.printParameters = false;
+
+	SECTION("Generating SPIRV")
+	{
+		auto spirv = writer.Generate(shader);
+		std::string output = printer.Print(spirv.data(), spirv.size(), settings);
+
+		INFO("full SPIRV output:\n" << output << "\nexcepted output:\n" << expectedOutput);
+		REQUIRE(output.find(expectedOutput) != std::string::npos);
+
+		// validate SPIRV with libspirv
+		spvtools::SpirvTools spirvTools(spv_target_env::SPV_ENV_VULKAN_1_0);
+		spirvTools.SetMessageConsumer([&](spv_message_level_t /*level*/, const char* /*source*/, const spv_position_t& /*position*/, const char* message)
+		{
+			std::string fullSpirv;
+			if (!spirvTools.Disassemble(spirv, &fullSpirv))
+				fullSpirv = "<failed to disassemble SPIRV>";
+
+			UNSCOPED_INFO(fullSpirv + "\n" + message);
+		});
+
+		REQUIRE(spirvTools.Validate(spirv));
+	}
+}