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#include "aocommon/transform_if.h"
#include <boost/test/unit_test.hpp>
// Since boost test can't do compile-time validation the tests use asserts.
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <algorithm>
#include <array>
#include <cassert>
#if __cplusplus > 201703L
// std::equal is constexpr since C++20
using std::equal;
#else
template <class InputIt1, class InputIt2>
#if __cplusplus > 201402L
constexpr
#endif
bool
equal(InputIt1 first1, InputIt1 last1, InputIt2 first2) {
while (first1 != last1) {
if (!(*first1 == *first2)) {
return false;
}
++first1;
++first2;
}
return true;
}
#endif
static constexpr std::array<int, 10> kInput{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
BOOST_AUTO_TEST_SUITE(transform_if)
#if __cplusplus > 201402L
constexpr
#endif
bool
TestAllFalse() {
std::array<int, 10> output{};
std::array<int, 10>::iterator out = aocommon::transform_if(
kInput.begin(), kInput.end(), output.begin(), [](int) { return false; },
[](int i) { return i; });
assert(out == output.begin());
return true;
}
BOOST_AUTO_TEST_CASE(transform_if_all_false) {
TestAllFalse();
#if __cplusplus > 201402L
static_assert(TestAllFalse());
#endif
}
#if __cplusplus > 201402L
constexpr
#endif
bool
TestAllTrue() {
std::array<int, 10> output{};
std::array<int, 10>::iterator out = aocommon::transform_if(
kInput.begin(), kInput.end(), output.begin(), [](int) { return true; },
[](int i) { return i; });
assert(out == output.end());
assert(equal(kInput.begin(), kInput.end(), output.begin()));
return true;
}
BOOST_AUTO_TEST_CASE(transform_if_all_true) {
TestAllTrue();
#if __cplusplus > 201402L
static_assert(TestAllTrue());
#endif
}
#if __cplusplus > 201402L
constexpr
#endif
bool
TestLessThanFive() {
std::array<int, 10> output{};
std::array<int, 10>::iterator out = aocommon::transform_if(
kInput.begin(), kInput.end(), output.begin(), [](int i) { return i < 5; },
[](int i) { return i; });
assert(out == output.begin() + 5);
assert(equal(kInput.begin(), kInput.begin() + 5, output.begin()));
return true;
}
BOOST_AUTO_TEST_CASE(transform_if_less_than_five) {
TestLessThanFive();
#if __cplusplus > 201402L
static_assert(TestLessThanFive());
#endif
}
#if __cplusplus > 201402L
constexpr
#endif
bool
TestLessThanThreeToDouble() {
std::array<double, 10> output{};
std::array<double, 10>::iterator out = aocommon::transform_if(
kInput.begin(), kInput.end(), output.begin(), [](int i) { return i < 3; },
[](int i) { return i + 3; });
assert(out == output.begin() + 3);
assert(equal(kInput.begin() + 3, kInput.begin() + 6, output.begin()));
return true;
}
BOOST_AUTO_TEST_CASE(transform_if_less_than_three_to_double) {
TestLessThanThreeToDouble();
#if __cplusplus > 201402L
static_assert(TestLessThanThreeToDouble());
#endif
}
#if __cplusplus > 201402L
constexpr
#endif
bool
TestToUnrelatedType() {
constexpr std::array<const char*, 3> kData{"abc", "def", "ghi"};
std::array<const char*, 3> output{};
std::array<const char*, 3>::iterator out = aocommon::transform_if(
kInput.begin(), kInput.end(), output.begin(),
[](int i) { return i == 5; }, [&](int i) { return kData[1]; });
assert(out == output.begin() + 1);
assert(output.front() == kData[1]);
return true;
}
BOOST_AUTO_TEST_CASE(transform_if_to_unrelated_type) {
TestToUnrelatedType();
#if __cplusplus > 201402L
static_assert(TestToUnrelatedType());
#endif
}
BOOST_AUTO_TEST_SUITE_END()
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