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#include <c10/util/Optional.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <array>
#include <cstdint>
#include <string>
namespace {
using testing::Eq;
using testing::Ge;
using testing::Gt;
using testing::Le;
using testing::Lt;
using testing::Ne;
using testing::Not;
template <typename T>
class OptionalTest : public ::testing::Test {
public:
using optional = c10::optional<T>;
};
template <typename T>
T getSampleValue();
template <>
bool getSampleValue() {
return true;
}
template <>
uint64_t getSampleValue() {
return 42;
}
template <>
c10::IntArrayRef getSampleValue() {
return {};
}
template <>
std::string getSampleValue() {
return "hello";
}
using OptionalTypes = ::testing::Types<
// 32-bit scalar optimization.
bool,
// Trivially destructible but not 32-bit scalar.
uint64_t,
// ArrayRef optimization.
c10::IntArrayRef,
// Non-trivial destructor.
std::string>;
// This assert is also in Optional.cpp; including here too to make it
// more likely that we'll remember to port this optimization over when
// we move to std::optional.
static_assert(
sizeof(c10::optional<c10::IntArrayRef>) == sizeof(c10::IntArrayRef),
"c10::optional<IntArrayRef> should be size-optimized");
TYPED_TEST_CASE(OptionalTest, OptionalTypes);
TYPED_TEST(OptionalTest, Empty) {
typename TestFixture::optional empty;
EXPECT_FALSE((bool)empty);
EXPECT_FALSE(empty.has_value());
// NOLINTNEXTLINE(hicpp-avoid-goto,cppcoreguidelines-avoid-goto)
EXPECT_THROW(empty.value(), c10::bad_optional_access);
}
TYPED_TEST(OptionalTest, Initialized) {
using optional = typename TestFixture::optional;
const auto val = getSampleValue<TypeParam>();
optional opt((val));
auto copy(opt), moveFrom1(opt), moveFrom2(opt);
optional move(std::move(moveFrom1));
optional copyAssign;
copyAssign = opt;
optional moveAssign;
moveAssign = std::move(moveFrom2);
std::array<typename TestFixture::optional*, 5> opts = {
&opt, ©, ©Assign, &move, &moveAssign};
for (auto* popt : opts) {
auto& opt = *popt;
EXPECT_TRUE((bool)opt);
EXPECT_TRUE(opt.has_value());
EXPECT_EQ(opt.value(), val);
EXPECT_EQ(*opt, val);
}
}
class SelfCompareTest : public testing::TestWithParam<c10::optional<int>> {};
TEST_P(SelfCompareTest, SelfCompare) {
c10::optional<int> x = GetParam();
EXPECT_THAT(x, Eq(x));
EXPECT_THAT(x, Le(x));
EXPECT_THAT(x, Ge(x));
EXPECT_THAT(x, Not(Ne(x)));
EXPECT_THAT(x, Not(Lt(x)));
EXPECT_THAT(x, Not(Gt(x)));
}
INSTANTIATE_TEST_CASE_P(
nullopt,
SelfCompareTest,
testing::Values(c10::nullopt));
INSTANTIATE_TEST_CASE_P(
int,
SelfCompareTest,
testing::Values(c10::make_optional(2)));
TEST(OptionalTest, Nullopt) {
c10::optional<int> x = 2;
EXPECT_THAT(c10::nullopt, Not(Eq(x)));
EXPECT_THAT(x, Not(Eq(c10::nullopt)));
EXPECT_THAT(x, Ne(c10::nullopt));
EXPECT_THAT(c10::nullopt, Ne(x));
EXPECT_THAT(x, Not(Lt(c10::nullopt)));
EXPECT_THAT(c10::nullopt, Lt(x));
EXPECT_THAT(x, Not(Le(c10::nullopt)));
EXPECT_THAT(c10::nullopt, Le(x));
EXPECT_THAT(x, Gt(c10::nullopt));
EXPECT_THAT(c10::nullopt, Not(Gt(x)));
EXPECT_THAT(x, Ge(c10::nullopt));
EXPECT_THAT(c10::nullopt, Not(Ge(x)));
}
// Ensure comparisons work...
using CmpTestTypes = testing::Types<
// between two optionals
std::pair<c10::optional<int>, c10::optional<int>>,
// between an optional and a value
std::pair<c10::optional<int>, int>,
// between a value and an optional
std::pair<int, c10::optional<int>>,
// between an optional and a differently typed value
std::pair<c10::optional<int>, long>,
// between a differently typed value and an optional
std::pair<long, c10::optional<int>>>;
template <typename T>
class CmpTest : public testing::Test {};
TYPED_TEST_CASE(CmpTest, CmpTestTypes);
TYPED_TEST(CmpTest, Cmp) {
TypeParam pair = {2, 3};
auto x = pair.first;
auto y = pair.second;
EXPECT_THAT(x, Not(Eq(y)));
EXPECT_THAT(x, Ne(y));
EXPECT_THAT(x, Lt(y));
EXPECT_THAT(y, Not(Lt(x)));
EXPECT_THAT(x, Le(y));
EXPECT_THAT(y, Not(Le(x)));
EXPECT_THAT(x, Not(Gt(y)));
EXPECT_THAT(y, Gt(x));
EXPECT_THAT(x, Not(Ge(y)));
EXPECT_THAT(y, Ge(x));
}
} // namespace
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