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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 "src/castable.h"
#include <memory>
#include <string>
#include "gtest/gtest.h"
namespace tint {
namespace {
struct Animal : public tint::Castable<Animal> {
explicit Animal(std::string n) : name(n) {}
const std::string name;
};
struct Amphibian : public tint::Castable<Amphibian, Animal> {
explicit Amphibian(std::string n) : Base(n) {}
};
struct Mammal : public tint::Castable<Mammal, Animal> {
explicit Mammal(std::string n) : Base(n) {}
};
struct Reptile : public tint::Castable<Reptile, Animal> {
explicit Reptile(std::string n) : Base(n) {}
};
struct Frog : public tint::Castable<Frog, Amphibian> {
Frog() : Base("Frog") {}
};
struct Bear : public tint::Castable<Bear, Mammal> {
Bear() : Base("Bear") {}
};
struct Gecko : public tint::Castable<Gecko, Reptile> {
Gecko() : Base("Gecko") {}
};
TEST(CastableBase, Is) {
std::unique_ptr<CastableBase> frog = std::make_unique<Frog>();
std::unique_ptr<CastableBase> bear = std::make_unique<Bear>();
std::unique_ptr<CastableBase> gecko = std::make_unique<Gecko>();
ASSERT_TRUE(frog->Is<Animal>());
ASSERT_TRUE(bear->Is<Animal>());
ASSERT_TRUE(gecko->Is<Animal>());
ASSERT_TRUE(frog->Is<Amphibian>());
ASSERT_FALSE(bear->Is<Amphibian>());
ASSERT_FALSE(gecko->Is<Amphibian>());
ASSERT_FALSE(frog->Is<Mammal>());
ASSERT_TRUE(bear->Is<Mammal>());
ASSERT_FALSE(gecko->Is<Mammal>());
ASSERT_FALSE(frog->Is<Reptile>());
ASSERT_FALSE(bear->Is<Reptile>());
ASSERT_TRUE(gecko->Is<Reptile>());
}
TEST(CastableBase, Is_kDontErrorOnImpossibleCast) {
// Unlike TEST(CastableBase, Is), we're dynamically querying [A -> B] without
// going via CastableBase.
auto frog = std::make_unique<Frog>();
auto bear = std::make_unique<Bear>();
auto gecko = std::make_unique<Gecko>();
ASSERT_TRUE((frog->Is<Animal, kDontErrorOnImpossibleCast>()));
ASSERT_TRUE((bear->Is<Animal, kDontErrorOnImpossibleCast>()));
ASSERT_TRUE((gecko->Is<Animal, kDontErrorOnImpossibleCast>()));
ASSERT_TRUE((frog->Is<Amphibian, kDontErrorOnImpossibleCast>()));
ASSERT_FALSE((bear->Is<Amphibian, kDontErrorOnImpossibleCast>()));
ASSERT_FALSE((gecko->Is<Amphibian, kDontErrorOnImpossibleCast>()));
ASSERT_FALSE((frog->Is<Mammal, kDontErrorOnImpossibleCast>()));
ASSERT_TRUE((bear->Is<Mammal, kDontErrorOnImpossibleCast>()));
ASSERT_FALSE((gecko->Is<Mammal, kDontErrorOnImpossibleCast>()));
ASSERT_FALSE((frog->Is<Reptile, kDontErrorOnImpossibleCast>()));
ASSERT_FALSE((bear->Is<Reptile, kDontErrorOnImpossibleCast>()));
ASSERT_TRUE((gecko->Is<Reptile, kDontErrorOnImpossibleCast>()));
}
TEST(CastableBase, IsWithPredicate) {
std::unique_ptr<CastableBase> frog = std::make_unique<Frog>();
frog->Is<Animal>([&frog](const Animal* a) {
EXPECT_EQ(a, frog.get());
return true;
});
ASSERT_TRUE((frog->Is<Animal>([](const Animal*) { return true; })));
ASSERT_FALSE((frog->Is<Animal>([](const Animal*) { return false; })));
// Predicate not called if cast is invalid
auto expect_not_called = [] { FAIL() << "Should not be called"; };
ASSERT_FALSE((frog->Is<Bear>([&](const Animal*) {
expect_not_called();
return true;
})));
}
TEST(CastableBase, IsAnyOf) {
std::unique_ptr<CastableBase> frog = std::make_unique<Frog>();
std::unique_ptr<CastableBase> bear = std::make_unique<Bear>();
std::unique_ptr<CastableBase> gecko = std::make_unique<Gecko>();
ASSERT_TRUE((frog->IsAnyOf<Animal, Mammal, Amphibian, Reptile>()));
ASSERT_TRUE((frog->IsAnyOf<Mammal, Amphibian>()));
ASSERT_TRUE((frog->IsAnyOf<Amphibian, Reptile>()));
ASSERT_FALSE((frog->IsAnyOf<Mammal, Reptile>()));
ASSERT_TRUE((bear->IsAnyOf<Animal, Mammal, Amphibian, Reptile>()));
ASSERT_TRUE((bear->IsAnyOf<Mammal, Amphibian>()));
ASSERT_TRUE((bear->IsAnyOf<Mammal, Reptile>()));
ASSERT_FALSE((bear->IsAnyOf<Amphibian, Reptile>()));
ASSERT_TRUE((gecko->IsAnyOf<Animal, Mammal, Amphibian, Reptile>()));
ASSERT_TRUE((gecko->IsAnyOf<Mammal, Reptile>()));
ASSERT_TRUE((gecko->IsAnyOf<Amphibian, Reptile>()));
ASSERT_FALSE((gecko->IsAnyOf<Mammal, Amphibian>()));
}
TEST(CastableBase, As) {
std::unique_ptr<CastableBase> frog = std::make_unique<Frog>();
std::unique_ptr<CastableBase> bear = std::make_unique<Bear>();
std::unique_ptr<CastableBase> gecko = std::make_unique<Gecko>();
ASSERT_EQ(frog->As<Animal>(), static_cast<Animal*>(frog.get()));
ASSERT_EQ(bear->As<Animal>(), static_cast<Animal*>(bear.get()));
ASSERT_EQ(gecko->As<Animal>(), static_cast<Animal*>(gecko.get()));
ASSERT_EQ(frog->As<Amphibian>(), static_cast<Amphibian*>(frog.get()));
ASSERT_EQ(bear->As<Amphibian>(), nullptr);
ASSERT_EQ(gecko->As<Amphibian>(), nullptr);
ASSERT_EQ(frog->As<Mammal>(), nullptr);
ASSERT_EQ(bear->As<Mammal>(), static_cast<Mammal*>(bear.get()));
ASSERT_EQ(gecko->As<Mammal>(), nullptr);
ASSERT_EQ(frog->As<Reptile>(), nullptr);
ASSERT_EQ(bear->As<Reptile>(), nullptr);
ASSERT_EQ(gecko->As<Reptile>(), static_cast<Reptile*>(gecko.get()));
}
TEST(CastableBase, As_kDontErrorOnImpossibleCast) {
// Unlike TEST(CastableBase, As), we're dynamically casting [A -> B] without
// going via CastableBase.
auto frog = std::make_unique<Frog>();
auto bear = std::make_unique<Bear>();
auto gecko = std::make_unique<Gecko>();
ASSERT_EQ((frog->As<Animal, kDontErrorOnImpossibleCast>()),
static_cast<Animal*>(frog.get()));
ASSERT_EQ((bear->As<Animal, kDontErrorOnImpossibleCast>()),
static_cast<Animal*>(bear.get()));
ASSERT_EQ((gecko->As<Animal, kDontErrorOnImpossibleCast>()),
static_cast<Animal*>(gecko.get()));
ASSERT_EQ((frog->As<Amphibian, kDontErrorOnImpossibleCast>()),
static_cast<Amphibian*>(frog.get()));
ASSERT_EQ((bear->As<Amphibian, kDontErrorOnImpossibleCast>()), nullptr);
ASSERT_EQ((gecko->As<Amphibian, kDontErrorOnImpossibleCast>()), nullptr);
ASSERT_EQ((frog->As<Mammal, kDontErrorOnImpossibleCast>()), nullptr);
ASSERT_EQ((bear->As<Mammal, kDontErrorOnImpossibleCast>()),
static_cast<Mammal*>(bear.get()));
ASSERT_EQ((gecko->As<Mammal, kDontErrorOnImpossibleCast>()), nullptr);
ASSERT_EQ((frog->As<Reptile, kDontErrorOnImpossibleCast>()), nullptr);
ASSERT_EQ((bear->As<Reptile, kDontErrorOnImpossibleCast>()), nullptr);
ASSERT_EQ((gecko->As<Reptile, kDontErrorOnImpossibleCast>()),
static_cast<Reptile*>(gecko.get()));
}
TEST(Castable, Is) {
std::unique_ptr<Animal> frog = std::make_unique<Frog>();
std::unique_ptr<Animal> bear = std::make_unique<Bear>();
std::unique_ptr<Animal> gecko = std::make_unique<Gecko>();
ASSERT_TRUE(frog->Is<Animal>());
ASSERT_TRUE(bear->Is<Animal>());
ASSERT_TRUE(gecko->Is<Animal>());
ASSERT_TRUE(frog->Is<Amphibian>());
ASSERT_FALSE(bear->Is<Amphibian>());
ASSERT_FALSE(gecko->Is<Amphibian>());
ASSERT_FALSE(frog->Is<Mammal>());
ASSERT_TRUE(bear->Is<Mammal>());
ASSERT_FALSE(gecko->Is<Mammal>());
ASSERT_FALSE(frog->Is<Reptile>());
ASSERT_FALSE(bear->Is<Reptile>());
ASSERT_TRUE(gecko->Is<Reptile>());
}
TEST(Castable, IsWithPredicate) {
std::unique_ptr<Animal> frog = std::make_unique<Frog>();
frog->Is<Animal>([&frog](const Animal* a) {
EXPECT_EQ(a, frog.get());
return true;
});
ASSERT_TRUE((frog->Is<Animal>([](const Animal*) { return true; })));
ASSERT_FALSE((frog->Is<Animal>([](const Animal*) { return false; })));
// Predicate not called if cast is invalid
auto expect_not_called = [] { FAIL() << "Should not be called"; };
ASSERT_FALSE((frog->Is<Bear>([&](const Animal*) {
expect_not_called();
return true;
})));
}
TEST(Castable, As) {
std::unique_ptr<Animal> frog = std::make_unique<Frog>();
std::unique_ptr<Animal> bear = std::make_unique<Bear>();
std::unique_ptr<Animal> gecko = std::make_unique<Gecko>();
ASSERT_EQ(frog->As<Animal>(), static_cast<Animal*>(frog.get()));
ASSERT_EQ(bear->As<Animal>(), static_cast<Animal*>(bear.get()));
ASSERT_EQ(gecko->As<Animal>(), static_cast<Animal*>(gecko.get()));
ASSERT_EQ(frog->As<Amphibian>(), static_cast<Amphibian*>(frog.get()));
ASSERT_EQ(bear->As<Amphibian>(), nullptr);
ASSERT_EQ(gecko->As<Amphibian>(), nullptr);
ASSERT_EQ(frog->As<Mammal>(), nullptr);
ASSERT_EQ(bear->As<Mammal>(), static_cast<Mammal*>(bear.get()));
ASSERT_EQ(gecko->As<Mammal>(), nullptr);
ASSERT_EQ(frog->As<Reptile>(), nullptr);
ASSERT_EQ(bear->As<Reptile>(), nullptr);
ASSERT_EQ(gecko->As<Reptile>(), static_cast<Reptile*>(gecko.get()));
}
} // namespace
TINT_INSTANTIATE_TYPEINFO(Animal);
TINT_INSTANTIATE_TYPEINFO(Amphibian);
TINT_INSTANTIATE_TYPEINFO(Mammal);
TINT_INSTANTIATE_TYPEINFO(Reptile);
TINT_INSTANTIATE_TYPEINFO(Frog);
TINT_INSTANTIATE_TYPEINFO(Bear);
TINT_INSTANTIATE_TYPEINFO(Gecko);
} // namespace tint