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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <memory>
#include <vector>
#include "gtest/gtest.h"
#include "src/ast/binding_decoration.h"
#include "src/ast/builtin_decoration.h"
#include "src/ast/decorated_variable.h"
#include "src/ast/location_decoration.h"
#include "src/ast/set_decoration.h"
#include "src/ast/type/f32_type.h"
#include "src/ast/variable_decoration.h"
#include "src/writer/wgsl/generator_impl.h"
namespace tint {
namespace writer {
namespace wgsl {
namespace {
using GeneratorImplTest = testing::Test;
TEST_F(GeneratorImplTest, EmitVariable) {
ast::type::F32Type f32;
ast::Variable v("a", ast::StorageClass::kNone, &f32);
GeneratorImpl g;
ASSERT_TRUE(g.EmitVariable(&v)) << g.error();
EXPECT_EQ(g.result(), R"(var a : f32;
)");
}
TEST_F(GeneratorImplTest, EmitVariable_StorageClass) {
ast::type::F32Type f32;
ast::Variable v("a", ast::StorageClass::kInput, &f32);
GeneratorImpl g;
ASSERT_TRUE(g.EmitVariable(&v)) << g.error();
EXPECT_EQ(g.result(), R"(var<in> a : f32;
)");
}
TEST_F(GeneratorImplTest, EmitVariable_Decorated) {
ast::type::F32Type f32;
std::vector<std::unique_ptr<ast::VariableDecoration>> decos;
decos.push_back(std::make_unique<ast::LocationDecoration>(2));
ast::DecoratedVariable dv;
dv.set_name("a");
dv.set_type(&f32);
dv.set_decorations(std::move(decos));
GeneratorImpl g;
ASSERT_TRUE(g.EmitVariable(&dv)) << g.error();
EXPECT_EQ(g.result(), R"([[location 2]] var a : f32;
)");
}
TEST_F(GeneratorImplTest, EmitVariable_Decorated_Multiple) {
ast::type::F32Type f32;
std::vector<std::unique_ptr<ast::VariableDecoration>> decos;
decos.push_back(
std::make_unique<ast::BuiltinDecoration>(ast::Builtin::kPosition));
decos.push_back(std::make_unique<ast::BindingDecoration>(0));
decos.push_back(std::make_unique<ast::SetDecoration>(1));
decos.push_back(std::make_unique<ast::LocationDecoration>(2));
ast::DecoratedVariable dv;
dv.set_name("a");
dv.set_type(&f32);
dv.set_decorations(std::move(decos));
GeneratorImpl g;
ASSERT_TRUE(g.EmitVariable(&dv)) << g.error();
EXPECT_EQ(g.result(),
R"([[builtin position, binding 0, set 1, location 2]] var a : f32;
)");
}
TEST_F(GeneratorImplTest, EmitVariable_Initializer) {
auto ident = std::make_unique<ast::IdentifierExpression>("initializer");
ast::type::F32Type f32;
ast::Variable v("a", ast::StorageClass::kNone, &f32);
v.set_initializer(std::move(ident));
GeneratorImpl g;
ASSERT_TRUE(g.EmitVariable(&v)) << g.error();
EXPECT_EQ(g.result(), R"(var a : f32 = initializer;
)");
}
TEST_F(GeneratorImplTest, EmitVariable_Const) {
auto ident = std::make_unique<ast::IdentifierExpression>("initializer");
ast::type::F32Type f32;
ast::Variable v("a", ast::StorageClass::kNone, &f32);
v.set_initializer(std::move(ident));
v.set_is_const(true);
GeneratorImpl g;
ASSERT_TRUE(g.EmitVariable(&v)) << g.error();
EXPECT_EQ(g.result(), R"(const a : f32 = initializer;
)");
}
} // namespace
} // namespace wgsl
} // namespace writer
} // namespace tint