src/tint/lang/glsl/writer/switch_test.cc

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#include "src/tint/lang/glsl/writer/helper_test.h"

#include "gmock/gmock.h"

using namespace tint::core::fluent_types;     // NOLINT
using namespace tint::core::number_suffixes;  // NOLINT

namespace tint::glsl::writer {
namespace {

TEST_F(GlslWriterTest, Switch) {
    auto* f = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kCompute);
    f->SetWorkgroupSize(1, 1, 1);

    b.Append(f->Block(), [&] {
        auto* a = b.Var("a", b.Zero<i32>());
        auto* s = b.Switch(b.Load(a));
        b.Append(b.Case(s, {b.Constant(5_i)}), [&] { b.ExitSwitch(s); });
        b.Append(b.DefaultCase(s), [&] { b.ExitSwitch(s); });
        b.Return(f);
    });

    ASSERT_TRUE(Generate()) << err_ << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  int a = 0;
  switch(a) {
    case 5:
    {
      break;
    }
    default:
    {
      break;
    }
  }
}
)");
}

TEST_F(GlslWriterTest, Switch_MixedDefault) {
    auto* f = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kCompute);
    f->SetWorkgroupSize(1, 1, 1);

    b.Append(f->Block(), [&] {
        auto* a = b.Var("a", b.Zero<i32>());
        auto* s = b.Switch(b.Load(a));
        auto* c = b.Case(s, {b.Constant(5_i), nullptr});
        b.Append(c, [&] { b.ExitSwitch(s); });
        b.Return(f);
    });

    ASSERT_TRUE(Generate()) << err_ << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  int a = 0;
  switch(a) {
    case 5:
    default:
    {
      break;
    }
  }
}
)");
}

}  // namespace
}  // namespace tint::glsl::writer