// Copyright 2021 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 "src/tint/sem/reference_type.h"
#include "src/tint/sem/test_helper.h"

namespace tint {
namespace sem {
namespace {

using ReferenceTest = TestHelper;

TEST_F(ReferenceTest, Creation) {
  auto* a = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* b = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* c = create<Reference>(create<F32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* d = create<Reference>(create<I32>(), ast::StorageClass::kPrivate,
                              ast::Access::kReadWrite);
  auto* e = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kRead);

  EXPECT_TRUE(a->StoreType()->Is<sem::I32>());
  EXPECT_EQ(a->StorageClass(), ast::StorageClass::kStorage);
  EXPECT_EQ(a->Access(), ast::Access::kReadWrite);

  EXPECT_EQ(a, b);
  EXPECT_NE(a, c);
  EXPECT_NE(a, d);
  EXPECT_NE(a, e);
}

TEST_F(ReferenceTest, Hash) {
  auto* a = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* b = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* c = create<Reference>(create<F32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* d = create<Reference>(create<I32>(), ast::StorageClass::kPrivate,
                              ast::Access::kReadWrite);
  auto* e = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kRead);

  EXPECT_EQ(a->Hash(), b->Hash());
  EXPECT_NE(a->Hash(), c->Hash());
  EXPECT_NE(a->Hash(), d->Hash());
  EXPECT_NE(a->Hash(), e->Hash());
}

TEST_F(ReferenceTest, Equals) {
  auto* a = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* b = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* c = create<Reference>(create<F32>(), ast::StorageClass::kStorage,
                              ast::Access::kReadWrite);
  auto* d = create<Reference>(create<I32>(), ast::StorageClass::kPrivate,
                              ast::Access::kReadWrite);
  auto* e = create<Reference>(create<I32>(), ast::StorageClass::kStorage,
                              ast::Access::kRead);

  EXPECT_TRUE(a->Equals(*b));
  EXPECT_FALSE(a->Equals(*c));
  EXPECT_FALSE(a->Equals(*d));
  EXPECT_FALSE(a->Equals(*e));
  EXPECT_FALSE(a->Equals(Void{}));
}

TEST_F(ReferenceTest, FriendlyName) {
  auto* r = create<Reference>(create<I32>(), ast::StorageClass::kNone,
                              ast::Access::kRead);
  EXPECT_EQ(r->FriendlyName(Symbols()), "ref<i32, read>");
}

TEST_F(ReferenceTest, FriendlyNameWithStorageClass) {
  auto* r = create<Reference>(create<I32>(), ast::StorageClass::kWorkgroup,
                              ast::Access::kRead);
  EXPECT_EQ(r->FriendlyName(Symbols()), "ref<workgroup, i32, read>");
}

}  // namespace
}  // namespace sem
}  // namespace tint