Tools/TestWebKitAPI/Tests/WGSL/ASTStringDumperTests.cpp

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#include "config.h"
#include "ASTStringDumper.h"

#include "AST.h"
#include "Parser.h"
#include "TestWGSLAPI.h"
#include "WGSLShaderModule.h"

namespace TestWGSLAPI {

static String toString(WGSL::ShaderModule& shaderModule)
{
    WGSL::AST::StringDumper dumper;
    dumper.visit(shaderModule);
    return dumper.toString();
}

TEST(WGSLASTDumperTests, dumpTriangleVert)
{
    auto source =
        "@vertex\n"
        "fn main(\n"
        "    @builtin(vertex_index) VertexIndex : u32\n"
        ") -> @builtin(position) vec4<f32> {\n"
        "    var pos = array<vec2<f32>, 3>(\n"
        "        vec2<f32>(0.0, 0.5),\n"
        "        vec2<f32>(-0.5, -0.5),\n"
        "        vec2<f32>(0.5, -0.5)\n"
        "    );\n\n"
        "    return vec4<f32>(pos[VertexIndex], 0.0, 1.0);\n"
        "}\n"_s;
    WGSL::ShaderModule shader(source, { 8 });
    auto maybeError = WGSL::parse(shader);

    EXPECT_FALSE(maybeError.has_value());

    EXPECT_EQ(
        toString(shader),
        "@vertex\n"
        "fn main(\n"
        "    @builtin(vertex_index) VertexIndex: u32\n"
        ") -> @builtin(position) vec4<f32>\n"
        "{\n"
        "    var pos = array<vec2<f32>, 3>(vec2<f32>(0.000000, 0.500000), vec2<f32>(-0.500000, -0.500000), vec2<f32>(0.500000, -0.500000));\n"
        "    return vec4<f32>(pos[VertexIndex], 0.000000, 1.000000);\n"
        "}\n\n"_str);
}

} // namespace TestWGSLAPI