src/tint/lang/msl/writer/function_test.cc

// Copyright 2023 The Dawn & Tint Authors
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#include "src/tint/lang/core/type/sampled_texture.h"
#include "src/tint/lang/msl/writer/helper_test.h"

namespace tint::msl::writer {
namespace {

TEST_F(MslWriterTest, Function_Empty) {
    auto* func = b.Function("foo", ty.void_());
    func->Block()->Append(b.Return(func));

    ASSERT_TRUE(Generate()) << err_ << output_.msl;
    EXPECT_EQ(output_.msl, MetalHeader() + R"(
void foo() {
}
)");
}

TEST_F(MslWriterTest, EntryPointParameterBufferBindingPoint) {
    auto* func = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    auto* storage = b.FunctionParam("storage", ty.ptr(core::AddressSpace::kStorage, ty.i32()));
    auto* uniform = b.FunctionParam("uniform", ty.ptr(core::AddressSpace::kUniform, ty.i32()));
    storage->SetBindingPoint(0, 1);
    uniform->SetBindingPoint(0, 2);
    func->SetParams({storage, uniform});
    func->Block()->Append(b.Return(func));

    ASSERT_TRUE(Generate()) << err_ << output_.msl;
    EXPECT_EQ(output_.msl, MetalHeader() + R"(
fragment void foo(device int* storage [[buffer(1)]], const constant int* uniform [[buffer(2)]]) {
}
)");
}

TEST_F(MslWriterTest, EntryPointParameterHandleBindingPoint) {
    auto* t = ty.Get<core::type::SampledTexture>(core::type::TextureDimension::k2d, ty.f32());
    auto* func = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    auto* texture = b.FunctionParam("texture", t);
    auto* sampler = b.FunctionParam("sampler", ty.sampler());
    texture->SetBindingPoint(0, 1);
    sampler->SetBindingPoint(0, 2);
    func->SetParams({texture, sampler});
    func->Block()->Append(b.Return(func));

    ASSERT_TRUE(Generate()) << err_ << output_.msl;
    EXPECT_EQ(output_.msl, MetalHeader() + R"(
fragment void foo(texture2d<float, access::sample> texture [[texture(1)]], sampler sampler [[sampler(2)]]) {
}
)");
}

}  // namespace
}  // namespace tint::msl::writer