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IListRef_test.cpp
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IListRef_test.cpp
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#include <ATen/Functions.h>
#include <ATen/core/IListRef.h>
#include <ATen/core/Tensor.h>
#include <gtest/gtest.h>
#include <algorithm>
#include <iterator>
using namespace c10;
static std::vector<at::Tensor> get_tensor_vector() {
std::vector<at::Tensor> tensors;
const size_t SIZE = 5;
for (size_t i = 0; i < SIZE; i++) {
tensors.emplace_back(at::empty({0}));
}
return tensors;
}
static std::vector<optional<at::Tensor>> get_boxed_opt_tensor_vector() {
std::vector<optional<at::Tensor>> optional_tensors;
const size_t SIZE = 5;
for (size_t i = 0; i < SIZE * 2; i++) {
auto opt_tensor = (i % 2 == 0) ? optional<at::Tensor>(at::empty({0})) : nullopt;
optional_tensors.emplace_back(opt_tensor);
}
return optional_tensors;
}
static std::vector<at::OptionalTensorRef> get_unboxed_opt_tensor_vector() {
std::vector<at::OptionalTensorRef> optional_tensors;
const size_t SIZE = 5;
for (size_t i = 0; i < SIZE * 2; i++) {
auto opt_tensor = (i % 2 == 0) ? at::OptionalTensorRef(at::empty({0}))
: at::OptionalTensorRef();
optional_tensors.emplace_back(opt_tensor);
}
return optional_tensors;
}
template <typename T>
void check_elements_same(at::ITensorListRef list, const T& thing, int use_count) {
EXPECT_EQ(thing.size(), list.size());
size_t i = 0;
for (const auto& t : list) {
const at::Tensor& other = thing[i];
EXPECT_EQ(other.use_count(), use_count);
EXPECT_TRUE(other.is_same(t));
i++;
}
}
TEST(ITensorListRefTest, CtorEmpty_IsNone_Throws) {
at::ITensorListRef list;
EXPECT_TRUE(list.isNone());
// NOLINTNEXTLINE(cppcoreguidelines-avoid-goto,hicpp-avoid-goto)
EXPECT_THROW(list.size(), c10::Error);
}
TEST(ITensorListRefTest, CtorBoxed_IsBoxed) {
auto vec = get_tensor_vector();
List<at::Tensor> boxed(vec);
at::ITensorListRef list(boxed);
EXPECT_TRUE(list.isBoxed());
}
TEST(ITensorListRefTest, CtorUnboxed_IsUnboxed) {
auto vec = get_tensor_vector();
at::ArrayRef<at::Tensor> unboxed(vec);
at::ITensorListRef list(unboxed);
EXPECT_TRUE(list.isUnboxed());
}
TEST(ITensorListRefTest, CtorUnboxedIndirect_IsUnboxed) {
auto vec = get_tensor_vector();
auto check_is_unboxed = [](at::ITensorListRef list) {
EXPECT_TRUE(list.isUnboxed());
};
check_is_unboxed(at::ITensorListRef{vec[0]});
check_is_unboxed(at::ITensorListRef{vec.data(), vec.size()});
check_is_unboxed(at::ITensorListRef{vec.data(), vec.data() + vec.size()});
check_is_unboxed(vec);
check_is_unboxed({vec[0], vec[1], vec[2]});
}
TEST(ITensorListRefTest, CtorTemp_IsUnboxed) {
auto check_is_unboxed = [](at::ITensorListRef list) {
EXPECT_TRUE(list.isUnboxed());
};
auto vec = get_tensor_vector();
check_is_unboxed({vec[0], vec[1]});
}
TEST(ITensorListRefTest, Boxed_GetConstRefTensor) {
auto vec = get_tensor_vector();
// We need 'boxed' to be 'const' here (and some other tests below)
// because 'List<Tensor>::operator[]' returns a 'ListElementReference'
// instead of returning a 'Tensor'. On the other hand,
// 'List<Tensor>::operator[] const' returns a 'const Tensor &'.
const List<at::Tensor> boxed(vec);
at::ITensorListRef list(boxed);
static_assert(
std::is_same<decltype(*list.begin()), const at::Tensor&>::value,
"Accessing elements from List<Tensor> through a ITensorListRef should be const references.");
EXPECT_TRUE(boxed[0].is_same(*list.begin()));
EXPECT_TRUE(boxed[1].is_same(*(++list.begin())));
}
TEST(ITensorListRefTest, Unboxed_GetConstRefTensor) {
auto vec = get_tensor_vector();
at::ITensorListRef list(vec);
static_assert(
std::is_same<decltype(*list.begin()), const at::Tensor&>::value,
"Accessing elements from ArrayRef<Tensor> through a ITensorListRef should be const references.");
EXPECT_TRUE(vec[0].is_same(*list.begin()));
EXPECT_TRUE(vec[1].is_same(*(++list.begin())));
}
TEST(ITensorListRefTest, Boxed_Equal) {
auto vec = get_tensor_vector();
List<at::Tensor> boxed(vec);
check_elements_same(boxed, vec, /* use_count= */ 2);
}
TEST(ITensorListRefTest, Unboxed_Equal) {
auto vec = get_tensor_vector();
check_elements_same(at::ArrayRef<at::Tensor>(vec), vec, /* use_count= */ 1);
}
TEST(ITensorListRefTest, UnboxedIndirect_Equal) {
// The 4 ref-count locations:
// 1. `vec`
// 2. `initializer_list` for `ITensorListRef`
// 3. `initializer_list` for `std::vector`
// 4. temporary `std::vector`
auto vec = get_tensor_vector();
// Implicit constructors
check_elements_same(vec[0], std::vector<at::Tensor>{vec[0]}, /* use_count= */ 3);
check_elements_same({vec.data(), vec.size()}, vec, /* use_count= */ 1);
check_elements_same({vec.data(), vec.data() + vec.size()}, vec, /* use_count= */ 1);
// Vector constructor
check_elements_same(vec, vec, /* use_count= */ 1);
// InitializerList constructor
check_elements_same({vec[0], vec[1], vec[2]}, std::vector<at::Tensor>{vec[0], vec[1], vec[2]}, /* use_count= */ 4);
}
TEST(ITensorListRefTest, BoxedMaterialize_Equal) {
auto vec = get_tensor_vector();
List<at::Tensor> boxed(vec);
at::ITensorListRef list(boxed);
auto materialized = list.materialize();
check_elements_same(list, vec, 2);
check_elements_same(list, materialized, 2);
check_elements_same(materialized, vec, 2);
}
TEST(ITensorListRefTest, UnboxedMaterialize_Equal) {
auto vec = get_tensor_vector();
at::ArrayRef<at::Tensor> unboxed(vec);
at::ITensorListRef list(unboxed);
auto materialized = list.materialize();
check_elements_same(list, vec, 1);
check_elements_same(list, materialized, 1);
check_elements_same(materialized, vec, 1);
}
TEST(ITensorListRefIteratorTest, CtorEmpty_ThrowsError) {
at::ITensorListRefIterator* it = new at::ITensorListRefIterator();
// NOLINTNEXTLINE(cppcoreguidelines-avoid-goto,hicpp-avoid-goto)
EXPECT_THROW(**it, c10::Error);
#if defined(_MSC_VER) && _ITERATOR_DEBUG_LEVEL == 2
EXPECT_THROW({ delete it; }, c10::Error);
#else
delete it;
#endif
}
TEST(ITensorListRefIteratorTest, Boxed_GetFirstElement) {
auto vec = get_tensor_vector();
const List<at::Tensor> boxed(vec);
at::ITensorListRef list(boxed);
EXPECT_TRUE(boxed[0].is_same(*list.begin()));
}
TEST(ITensorListRefIteratorTest, Unboxed_GetFirstElement) {
auto vec = get_tensor_vector();
at::ITensorListRef list(vec);
EXPECT_TRUE(vec[0].is_same(*list.begin()));
}
TEST(ITensorListRefIteratorTest, Boxed_Equality) {
auto vec = get_tensor_vector();
List<at::Tensor> boxed(vec);
at::ITensorListRef list(boxed);
EXPECT_EQ(list.begin(), list.begin());
EXPECT_NE(list.begin(), list.end());
EXPECT_NE(list.end(), list.begin());
EXPECT_EQ(list.end(), list.end());
}
TEST(ITensorListRefIteratorTest, Unboxed_Equality) {
auto vec = get_tensor_vector();
at::ITensorListRef list(vec);
EXPECT_EQ(list.begin(), list.begin());
EXPECT_NE(list.begin(), list.end());
EXPECT_NE(list.end(), list.begin());
EXPECT_EQ(list.end(), list.end());
}
TEST(ITensorListRefIteratorTest, Boxed_Iterate) {
auto vec = get_tensor_vector();
const List<at::Tensor> boxed(vec);
at::ITensorListRef list(boxed);
size_t i = 0;
for (const auto& t : list) {
EXPECT_TRUE(boxed[i++].is_same(t));
}
EXPECT_EQ(i, list.size());
}
TEST(ITensorListRefIteratorTest, Unboxed_Iterate) {
auto vec = get_tensor_vector();
at::ITensorListRef list(vec);
size_t i = 0;
for (const auto& t : list) {
EXPECT_TRUE(vec[i++].is_same(t));
}
EXPECT_EQ(i, list.size());
}
TEST(IOptTensorListRefTest, Boxed_Iterate) {
auto vec = get_boxed_opt_tensor_vector();
const List<optional<at::Tensor>> boxed(vec);
at::IOptTensorListRef list(boxed);
size_t i = 0;
for (const auto t : list) {
EXPECT_EQ(boxed[i].has_value(), t.has_value());
if (t.has_value()) {
EXPECT_TRUE((*boxed[i]).is_same(*t));
}
i++;
}
EXPECT_EQ(i, list.size());
}
TEST(IOptTensorListRefTest, Unboxed_Iterate) {
auto vec = get_unboxed_opt_tensor_vector();
at::ArrayRef<at::OptionalTensorRef> unboxed(vec);
at::IOptTensorListRef list(unboxed);
size_t i = 0;
for (const auto t : list) {
EXPECT_EQ(unboxed[i].has_value(), t.has_value());
if (t.has_value()) {
EXPECT_TRUE((*unboxed[i]).is_same(*t));
}
i++;
}
EXPECT_EQ(i, list.size());
}