src/ast/alias_test.cc

// 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 "src/ast/alias.h"
#include "src/ast/access.h"
#include "src/ast/array.h"
#include "src/ast/bool.h"
#include "src/ast/f32.h"
#include "src/ast/i32.h"
#include "src/ast/matrix.h"
#include "src/ast/pointer.h"
#include "src/ast/sampler.h"
#include "src/ast/struct.h"
#include "src/ast/test_helper.h"
#include "src/ast/texture.h"
#include "src/ast/u32.h"
#include "src/ast/vector.h"

namespace tint {
namespace ast {
namespace {

using AstAliasTest = TestHelper;

TEST_F(AstAliasTest, Create) {
  auto* u32 = create<U32>();
  auto* a = Alias("a_type", u32);
  EXPECT_EQ(a->symbol(), Symbol(1, ID()));
  EXPECT_EQ(a->type(), u32);
}

// Check for linear-time evaluation of Alias::type_name().
// If type_name() is non-linear, this test should noticeably stall.
// See: crbug.com/1200936
TEST_F(AstAliasTest, TypeName_LinearTime) {
  Type* type = ty.i32();
  for (int i = 0; i < 1024; i++) {
    type = ty.Of(Alias(Symbols().New(), type));
  }
  for (int i = 0; i < 16384; i++) {
    type->type_name();
  }
}

TEST_F(AstAliasTest, TypeName) {
  auto* at = Alias("Particle", create<I32>());
  EXPECT_EQ(at->type_name(), "__alias_$1__i32");
}

}  // namespace
}  // namespace ast
}  // namespace tint