text: // 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 "gtest/gtest.h"
  #include "src/ast/module.h"
  #include "src/ast/struct.h"
  #include "src/ast/struct_decoration.h"
  #include "src/ast/struct_member.h"
  #include "src/ast/struct_member_decoration.h"
  #include "src/ast/struct_member_offset_decoration.h"
  #include "src/ast/type/array_type.h"
  #include "src/ast/type/bool_type.h"
  #include "src/ast/type/f32_type.h"
  #include "src/ast/type/i32_type.h"
  #include "src/ast/type/matrix_type.h"
  #include "src/ast/type/pointer_type.h"
  #include "src/ast/type/struct_type.h"
  #include "src/ast/type/u32_type.h"
  #include "src/ast/type/vector_type.h"
  #include "src/ast/type/void_type.h"
  #include "src/writer/msl/generator_impl.h"
  
  namespace tint {
  namespace writer {
  namespace msl {
  namespace {
  
  using MslGeneratorImplTest = testing::Test;
  
  TEST_F(MslGeneratorImplTest, EmitType_Alias) {
    ast::type::F32Type f32;
    ast::type::AliasType alias("alias", &f32);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&alias, "")) << g.error();
    EXPECT_EQ(g.result(), "alias");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Alias_NameCollision) {
    ast::type::F32Type f32;
    ast::type::AliasType alias("bool", &f32);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&alias, "")) << g.error();
    EXPECT_EQ(g.result(), "bool_tint_0");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Array) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b, 4);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&a, "ary")) << g.error();
    EXPECT_EQ(g.result(), "bool ary[4]");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_ArrayOfArray) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b, 4);
    ast::type::ArrayType c(&a, 5);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&c, "ary")) << g.error();
    EXPECT_EQ(g.result(), "bool ary[5][4]");
  }
  
  // TODO(dsinclair): Is this possible? What order should it output in?
  TEST_F(MslGeneratorImplTest, DISABLED_EmitType_ArrayOfArrayOfRuntimeArray) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b, 4);
    ast::type::ArrayType c(&a, 5);
    ast::type::ArrayType d(&c);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&c, "ary")) << g.error();
    EXPECT_EQ(g.result(), "bool ary[5][4][1]");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_ArrayOfArrayOfArray) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b, 4);
    ast::type::ArrayType c(&a, 5);
    ast::type::ArrayType d(&c, 6);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&d, "ary")) << g.error();
    EXPECT_EQ(g.result(), "bool ary[6][5][4]");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Array_NameCollision) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b, 4);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&a, "bool")) << g.error();
    EXPECT_EQ(g.result(), "bool bool_tint_0[4]");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Array_WithoutName) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b, 4);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&a, "")) << g.error();
    EXPECT_EQ(g.result(), "bool[4]");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_RuntimeArray) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&a, "ary")) << g.error();
    EXPECT_EQ(g.result(), "bool ary[1]");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_RuntimeArray_NameCollision) {
    ast::type::BoolType b;
    ast::type::ArrayType a(&b);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&a, "discard_fragment")) << g.error();
    EXPECT_EQ(g.result(), "bool discard_fragment_tint_0[1]");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Bool) {
    ast::type::BoolType b;
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&b, "")) << g.error();
    EXPECT_EQ(g.result(), "bool");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_F32) {
    ast::type::F32Type f32;
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&f32, "")) << g.error();
    EXPECT_EQ(g.result(), "float");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_I32) {
    ast::type::I32Type i32;
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&i32, "")) << g.error();
    EXPECT_EQ(g.result(), "int");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Matrix) {
    ast::type::F32Type f32;
    ast::type::MatrixType m(&f32, 3, 2);
  
    ast::Module mod;
    GeneratorImpl g(&mod);
    ASSERT_TRUE(g.EmitType(&m, "")) << g.error();
    EXPECT_EQ(g.result(), "float2x3");
  }
  
  // TODO(dsinclair): How to annotate as workgroup?
  TEST_F(MslGeneratorImplTest, DISABLED_EmitType_Pointer) {
    ast::type::F32Type f32;
    ast::type::PointerType p(&f32, ast::StorageClass::kWorkgroup);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&p, "")) << g.error();
    EXPECT_EQ(g.result(), "float*");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Struct) {
    ast::type::I32Type i32;
    ast::type::F32Type f32;
  
    ast::StructMemberList members;
    members.push_back(std::make_unique<ast::StructMember>(
        "a", &i32, ast::StructMemberDecorationList{}));
  
    ast::StructMemberDecorationList b_deco;
    b_deco.push_back(std::make_unique<ast::StructMemberOffsetDecoration>(4));
    members.push_back(
        std::make_unique<ast::StructMember>("b", &f32, std::move(b_deco)));
  
    auto str = std::make_unique<ast::Struct>();
    str->set_members(std::move(members));
  
    ast::type::StructType s("S", std::move(str));
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&s, "")) << g.error();
    EXPECT_EQ(g.result(), "S");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_StructDecl) {
    ast::type::I32Type i32;
    ast::type::F32Type f32;
  
    ast::StructMemberList members;
    members.push_back(std::make_unique<ast::StructMember>(
        "a", &i32, ast::StructMemberDecorationList{}));
  
    ast::StructMemberDecorationList b_deco;
    b_deco.push_back(std::make_unique<ast::StructMemberOffsetDecoration>(4));
    members.push_back(
        std::make_unique<ast::StructMember>("b", &f32, std::move(b_deco)));
  
    auto str = std::make_unique<ast::Struct>();
    str->set_members(std::move(members));
  
    ast::type::StructType s("S", std::move(str));
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitStructType(&s)) << g.error();
    EXPECT_EQ(g.result(), R"(struct S {
    int a;
    float b;
  };
  )");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Struct_InjectPadding) {
    ast::type::I32Type i32;
    ast::type::F32Type f32;
  
    ast::StructMemberDecorationList decos;
    decos.push_back(std::make_unique<ast::StructMemberOffsetDecoration>(4));
  
    ast::StructMemberList members;
    members.push_back(
        std::make_unique<ast::StructMember>("a", &i32, std::move(decos)));
  
    decos.push_back(std::make_unique<ast::StructMemberOffsetDecoration>(32));
    members.push_back(
        std::make_unique<ast::StructMember>("b", &f32, std::move(decos)));
  
    decos.push_back(std::make_unique<ast::StructMemberOffsetDecoration>(128));
    members.push_back(
        std::make_unique<ast::StructMember>("c", &f32, std::move(decos)));
  
    auto str = std::make_unique<ast::Struct>();
    str->set_members(std::move(members));
  
    ast::type::StructType s("S", std::move(str));
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitStructType(&s)) << g.error();
    EXPECT_EQ(g.result(), R"(struct S {
    int8_t pad_0[4];
    int a;
    int8_t pad_1[24];
    float b;
    int8_t pad_2[92];
    float c;
  };
  )");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Struct_NameCollision) {
    ast::type::I32Type i32;
    ast::type::F32Type f32;
  
    ast::StructMemberList members;
    members.push_back(std::make_unique<ast::StructMember>(
        "main", &i32, ast::StructMemberDecorationList{}));
  
    ast::StructMemberDecorationList b_deco;
    members.push_back(
        std::make_unique<ast::StructMember>("float", &f32, std::move(b_deco)));
  
    auto str = std::make_unique<ast::Struct>();
    str->set_members(std::move(members));
  
    ast::type::StructType s("S", std::move(str));
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitStructType(&s)) << g.error();
    EXPECT_EQ(g.result(), R"(struct S {
    int main_tint_0;
    float float_tint_0;
  };
  )");
  }
  
  // TODO(dsinclair): How to translate [[block]]
  TEST_F(MslGeneratorImplTest, DISABLED_EmitType_Struct_WithDecoration) {
    ast::type::I32Type i32;
    ast::type::F32Type f32;
  
    ast::StructMemberList members;
    members.push_back(std::make_unique<ast::StructMember>(
        "a", &i32, ast::StructMemberDecorationList{}));
  
    ast::StructMemberDecorationList b_deco;
    b_deco.push_back(std::make_unique<ast::StructMemberOffsetDecoration>(4));
    members.push_back(
        std::make_unique<ast::StructMember>("b", &f32, std::move(b_deco)));
  
    ast::StructDecorationList decos;
    decos.push_back(ast::StructDecoration::kBlock);
    auto str =
        std::make_unique<ast::Struct>(std::move(decos), std::move(members));
  
    ast::type::StructType s("S", std::move(str));
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&s, "")) << g.error();
    EXPECT_EQ(g.result(), R"(struct {
    int a;
    float b;
  })");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_U32) {
    ast::type::U32Type u32;
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&u32, "")) << g.error();
    EXPECT_EQ(g.result(), "uint");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Vector) {
    ast::type::F32Type f32;
    ast::type::VectorType v(&f32, 3);
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&v, "")) << g.error();
    EXPECT_EQ(g.result(), "float3");
  }
  
  TEST_F(MslGeneratorImplTest, EmitType_Void) {
    ast::type::VoidType v;
  
    ast::Module m;
    GeneratorImpl g(&m);
    ASSERT_TRUE(g.EmitType(&v, "")) << g.error();
    EXPECT_EQ(g.result(), "void");
  }
  
  }  // namespace
  }  // namespace msl
  }  // namespace writer
  }  // namespace tint
  