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

// Copyright 2021 The Dawn & Tint Authors
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#include "src/tint/lang/glsl/writer/ast_printer/helper_test.h"

#include "gmock/gmock.h"

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

namespace tint::glsl::writer {
namespace {

using GlslASTPrinterTest_Switch = TestHelper;

TEST_F(GlslASTPrinterTest_Switch, Emit_Switch) {
    GlobalVar("cond", ty.i32(), core::AddressSpace::kPrivate);

    auto* def_body = Block(create<ast::BreakStatement>());
    auto* def = create<ast::CaseStatement>(Vector{DefaultCaseSelector()}, def_body);

    auto* case_body = Block(create<ast::BreakStatement>());
    auto* case_stmt = create<ast::CaseStatement>(Vector{CaseSelector(5_i)}, case_body);

    auto* cond = Expr("cond");
    auto* s = Switch(cond, Vector{case_stmt, def});
    WrapInFunction(s);

    ASTPrinter& gen = Build();
    gen.IncrementIndent();
    gen.EmitStatement(s);
    EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
    EXPECT_EQ(gen.Result(), R"(  switch(cond) {
    case 5: {
      break;
    }
    default: {
      break;
    }
  }
)");
}

TEST_F(GlslASTPrinterTest_Switch, Emit_Switch_MixedDefault) {
    GlobalVar("cond", ty.i32(), core::AddressSpace::kPrivate);

    auto* def_body = Block(create<ast::BreakStatement>());
    auto* def =
        create<ast::CaseStatement>(Vector{CaseSelector(5_i), DefaultCaseSelector()}, def_body);

    auto* cond = Expr("cond");
    auto* s = Switch(cond, Vector{def});
    WrapInFunction(s);

    ASTPrinter& gen = Build();
    gen.IncrementIndent();
    gen.EmitStatement(s);
    EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
    EXPECT_EQ(gen.Result(), R"(  switch(cond) {
    case 5:
    default: {
      break;
    }
  }
)");
}

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