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promise.hpp/untests/promise3_tests.cpp
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/*******************************************************************************
* This file is part of the "https://github.com/blackmatov/promise.hpp"
* For conditions of distribution and use, see copyright notice in LICENSE.md
* Copyright (C) 2018-2023, by Matvey Cherevko (blackmatov@gmail.com)
******************************************************************************/
#include <promise.hpp/promise.hpp>
#include <doctest/doctest.h>
#include <array>
#include <thread>
#include <numeric>
#include <cstring>
namespace pr = promise_hpp;
namespace
{
struct obj_t {
};
bool check_hello_fail_exception(std::exception_ptr e) {
try {
std::rethrow_exception(e);
} catch (std::logic_error& ee) {
return 0 == std::strcmp(ee.what(), "hello fail");
} catch (...) {
return false;
}
}
bool check_empty_aggregate_exception(std::exception_ptr e) {
try {
std::rethrow_exception(e);
} catch (pr::aggregate_exception& ee) {
return ee.empty();
} catch (...) {
return false;
}
}
bool check_two_aggregate_exception(std::exception_ptr e) {
try {
std::rethrow_exception(e);
} catch (pr::aggregate_exception& ee) {
if ( ee.size() != 2 ) {
return false;
}
return check_hello_fail_exception(ee[0])
&& check_hello_fail_exception(ee[1]);
} catch (...) {
return false;
}
}
}
TEST_CASE("promise3") {
SUBCASE("make_all_promise") {
{
bool all_is_ok = false;
pr::make_all_promise(std::vector<pr::promise<int>>())
.then([&all_is_ok](const std::vector<int>& c){
all_is_ok = c.empty();
});
REQUIRE(all_is_ok);
}
{
bool all_is_ok = false;
auto p = pr::make_resolved_promise().then_all([](){
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(32),
pr::make_resolved_promise(10)};
}).then([&all_is_ok](const std::vector<int>& c){
all_is_ok = (2 == c.size())
&& c[0] == 32
&& c[1] == 10;
});
REQUIRE(all_is_ok);
}
{
bool all_is_ok = false;
auto p = pr::make_resolved_promise(1).then_all([](int){
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(32),
pr::make_resolved_promise(10)};
}).then([&all_is_ok](const std::vector<int>& c){
all_is_ok = (2 == c.size())
&& c[0] == 32
&& c[1] == 10;
});
REQUIRE(all_is_ok);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
int call_then_only_once = 0;
pr::make_all_promise(std::vector<pr::promise<int>>{p1, p2})
.then([&call_then_only_once](const std::vector<int>& c){
(void)c;
++call_then_only_once;
});
p1.resolve(1);
p2.resolve(2);
REQUIRE(call_then_only_once == 1);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
int call_then_only_once = 0;
pr::make_all_promise(std::array<pr::promise<int>, 2>{p1, p2})
.then([&call_then_only_once](const std::vector<int>& c){
(void)c;
++call_then_only_once;
});
p1.resolve(1);
p2.resolve(2);
REQUIRE(call_then_only_once == 1);
}
{
class o_t {
public:
o_t() = delete;
o_t(int i) { (void)i; }
};
pr::promise<>()
.then_all([](){
return std::vector<pr::promise<o_t>>{
pr::make_resolved_promise<o_t>(40),
pr::make_resolved_promise<o_t>(2)};
});
}
}
SUBCASE("make_any_promise") {
{
bool all_is_ok = false;
auto p = pr::make_any_promise(std::vector<pr::promise<int>>{});
p.except([&all_is_ok](std::exception_ptr e){
all_is_ok = check_empty_aggregate_exception(e);
return 0;
});
REQUIRE(all_is_ok);
}
{
auto p = pr::make_resolved_promise().then_any([](){
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(32),
pr::make_resolved_promise(10)};
}).then([](int i){
return i;
});
REQUIRE(p.get() == 32);
}
{
auto p = pr::make_resolved_promise(1).then_any([](int){
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(32),
pr::make_resolved_promise(10)};
}).then([](int i){
return i;
});
REQUIRE(p.get() == 32);
}
{
auto p = pr::make_any_promise(std::vector<pr::promise<int>>{
pr::make_resolved_promise(32),
pr::make_rejected_promise<int>(std::logic_error("hello fail"))
}).then([](int i){
return i;
});
REQUIRE(p.get() == 32);
}
{
auto p = pr::make_any_promise(std::vector<pr::promise<int>>{
pr::make_rejected_promise<int>(std::logic_error("hello fail")),
pr::make_resolved_promise(32)
}).then([](int i){
return i;
});
REQUIRE(p.get() == 32);
}
{
bool all_is_ok = false;
auto p = pr::make_any_promise(std::vector<pr::promise<int>>{
pr::make_rejected_promise<int>(std::logic_error("hello fail")),
pr::make_rejected_promise<int>(std::logic_error("hello fail"))
}).except([&all_is_ok](std::exception_ptr e){
all_is_ok = check_two_aggregate_exception(e);
return 0;
});
REQUIRE(all_is_ok);
}
}
SUBCASE("make_race_promise") {
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
int check_42_int = 0;
int call_then_only_once = 0;
pr::make_race_promise(std::vector<pr::promise<int>>{p1, p2})
.then([&check_42_int, &call_then_only_once](const int& v){
check_42_int = v;
++call_then_only_once;
});
p1.resolve(42);
REQUIRE(check_42_int == 42);
REQUIRE(call_then_only_once == 1);
p2.resolve(84);
REQUIRE(check_42_int == 42);
REQUIRE(call_then_only_once == 1);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
int check_42_int = 0;
int call_then_only_once = 0;
pr::make_race_promise(std::vector<pr::promise<int>>{p1, p2})
.then([&check_42_int, &call_then_only_once](const int& v){
check_42_int = v;
++call_then_only_once;
});
p2.resolve(42);
REQUIRE(check_42_int == 42);
REQUIRE(call_then_only_once == 1);
p1.resolve(84);
REQUIRE(check_42_int == 42);
REQUIRE(call_then_only_once == 1);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
int check_42_int = 0;
int call_then_only_once = 0;
pr::make_race_promise(std::array<pr::promise<int>,2>{p1, p2})
.then([&check_42_int, &call_then_only_once](const int& v){
check_42_int = v;
++call_then_only_once;
});
p2.resolve(42);
REQUIRE(check_42_int == 42);
REQUIRE(call_then_only_once == 1);
p1.resolve(84);
REQUIRE(check_42_int == 42);
REQUIRE(call_then_only_once == 1);
}
{
class o_t {
public:
o_t() = delete;
o_t(int i) { (void)i; }
};
pr::promise<>()
.then_race([](){
return std::vector<pr::promise<o_t>>{
pr::make_resolved_promise<o_t>(40),
pr::make_resolved_promise<o_t>(2)};
});
}
}
SUBCASE("make_tuple_promise") {
{
static_assert(
std::is_same<
pr::impl::tuple_promise_result_t<std::tuple<>>,
std::tuple<>>::value,
"unit test fail");
static_assert(
std::is_same<
pr::impl::tuple_promise_result_t<std::tuple<pr::promise<int>>>,
std::tuple<int>>::value,
"unit test fail");
static_assert(
std::is_same<
pr::impl::tuple_promise_result_t<std::tuple<pr::promise<int>, pr::promise<float>>>,
std::tuple<int, float>>::value,
"unit test fail");
}
{
auto p = pr::make_tuple_promise(std::make_tuple());
REQUIRE(p.get() == std::make_tuple());
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::make_tuple_promise(std::make_tuple(p1));
p1.resolve(42);
REQUIRE(p2.get_or_default(std::make_tuple(0)) == std::make_tuple(42));
}
{
auto p1 = pr::promise<int>();
auto t0 = std::make_tuple(p1);
auto p2 = pr::make_tuple_promise(t0);
p1.resolve(42);
REQUIRE(p2.get_or_default(std::make_tuple(0)) == std::make_tuple(42));
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<float>();
auto p3 = pr::make_tuple_promise(std::make_tuple(p1, p2));
p1.resolve(42);
p2.resolve(4.2f);
REQUIRE(p3.get_or_default(std::make_tuple(0, 0.f)) == std::make_tuple(42, 4.2f));
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<float>();
auto p3 = pr::promise<int>();
auto p4 = pr::make_tuple_promise(std::make_tuple(p1, p2, p3));
p1.resolve(42);
p2.resolve(4.2f);
p3.resolve(84);
REQUIRE(p4.get_or_default(std::make_tuple(0, 0.f, 0)) == std::make_tuple(42, 4.2f, 84));
}
{
class o_t {
public:
o_t() = delete;
};
pr::promise<>()
.then_tuple([](){
auto p1 = pr::promise<o_t>();
auto p2 = pr::promise<o_t>();
return std::make_tuple(std::move(p1), std::move(p2));
});
}
{
auto p1 = pr::promise<std::reference_wrapper<int>>();
auto p2 = pr::promise<std::reference_wrapper<float>>();
auto p3 = pr::make_tuple_promise(std::make_tuple(p1, p2));
int i = 10;
float f = 0.f;
p1.resolve(i);
p2.resolve(f);
p3.then([&i,&f](const std::tuple<int&, float&>& t){
REQUIRE(&std::get<0>(t) == &i);
REQUIRE(&std::get<1>(t) == &f);
});
}
}
SUBCASE("make_all_promise_fail") {
{
bool call_fail_with_logic_error = false;
bool not_call_then_on_reject = true;
auto p = pr::make_all_promise(std::vector<pr::promise<int>>{
pr::make_rejected_promise<int>(std::logic_error("hello fail")),
pr::make_resolved_promise(10)
}).then([&not_call_then_on_reject](const std::vector<int>& c){
(void)c;
not_call_then_on_reject = false;
}).except([&call_fail_with_logic_error](std::exception_ptr e){
call_fail_with_logic_error = check_hello_fail_exception(e);
});
REQUIRE(not_call_then_on_reject);
REQUIRE(call_fail_with_logic_error);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
int call_then_count = 0;
int call_except_count = 0;
pr::make_all_promise(std::vector<pr::promise<int>>{p1, p2})
.then([&call_then_count](const std::vector<int>& c){
(void)c;
++call_then_count;
}, [&call_except_count](std::exception_ptr){
++call_except_count;
});
p1.resolve(1);
REQUIRE(call_then_count == 0);
REQUIRE(call_except_count == 0);
p2.reject(std::logic_error("hello fail"));
REQUIRE(call_then_count == 0);
REQUIRE(call_except_count == 1);
}
}
SUBCASE("make_race_promise_fail") {
{
bool call_fail_with_logic_error = false;
bool not_call_then_on_reject = true;
auto p = pr::make_race_promise(std::vector<pr::promise<int>>{
pr::make_rejected_promise<int>(std::logic_error("hello fail")),
pr::make_resolved_promise(10)
}).then([&not_call_then_on_reject](const int& c){
(void)c;
not_call_then_on_reject = false;
}).except([&call_fail_with_logic_error](std::exception_ptr e){
call_fail_with_logic_error = check_hello_fail_exception(e);
});
REQUIRE(not_call_then_on_reject);
REQUIRE(call_fail_with_logic_error);
}
}
SUBCASE("make_tuple_promise_fail") {
{
auto p1 = pr::promise<int>();
auto p2 = pr::make_tuple_promise(std::make_tuple(p1));
p1.reject(std::logic_error("hello failt"));
REQUIRE_THROWS_AS(p2.get(), std::logic_error);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<float>();
auto p3 = pr::make_tuple_promise(std::make_tuple(p1, p2));
p1.resolve(42);
p2.reject(std::logic_error("hello failt"));
REQUIRE_THROWS_AS(p3.get(), std::logic_error);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<float>();
auto p3 = pr::make_tuple_promise(std::make_tuple(p1, p2));
p1.reject(std::logic_error("hello failt"));
p2.resolve(4.2f);
REQUIRE_THROWS_AS(p3.get(), std::logic_error);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<float>();
auto p3 = pr::make_tuple_promise(std::make_tuple(p1, p2));
p1.reject(std::logic_error("hello failt"));
REQUIRE_THROWS_AS(p3.get(), std::logic_error);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<float>();
auto p3 = pr::make_tuple_promise(std::make_tuple(p1, p2));
p2.reject(std::logic_error("hello failt"));
REQUIRE_THROWS_AS(p3.get(), std::logic_error);
}
}
SUBCASE("then_all") {
{
int check_42_int = 0;
pr::make_resolved_promise()
.then_all([](){
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(32),
pr::make_resolved_promise(10)};
}).then([&check_42_int](const std::vector<int>& v){
if ( v.size() == 2) {
check_42_int = v[0] + v[1];
}
});
REQUIRE(check_42_int == 42);
}
{
int check_42_int = 0;
int check_42_int2 = 0;
pr::make_resolved_promise(42)
.then_all([&check_42_int](int v){
check_42_int = v;
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(32),
pr::make_resolved_promise(10)};
}).then([&check_42_int2](const std::vector<int>& v){
if ( v.size() == 2) {
check_42_int2 = v[0] + v[1];
}
});
REQUIRE(check_42_int == 42);
REQUIRE(check_42_int2 == 42);
}
}
SUBCASE("then_race") {
{
int check_42_int = 0;
pr::make_resolved_promise()
.then_race([](){
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(42),
pr::make_rejected_promise<int>(std::logic_error("hello fail"))};
}).then([&check_42_int](const int& v){
check_42_int = v;
});
REQUIRE(check_42_int == 42);
}
{
bool call_fail_with_logic_error = false;
pr::make_resolved_promise()
.then_race([](){
return std::vector<pr::promise<int>>{
pr::make_rejected_promise<int>(std::logic_error("hello fail")),
pr::make_resolved_promise(42)};
}).except([&call_fail_with_logic_error](std::exception_ptr e){
call_fail_with_logic_error = check_hello_fail_exception(e);
return 0;
});
REQUIRE(call_fail_with_logic_error);
}
{
int check_42_int = 0;
int check_42_int2 = 0;
int call_then_only_once = 0;
pr::make_resolved_promise(42)
.then_race([&check_42_int](int v){
check_42_int = v;
return std::vector<pr::promise<int>>{
pr::make_resolved_promise(42),
pr::make_resolved_promise(10)};
}).then([&call_then_only_once, &check_42_int2](const int& v){
++call_then_only_once;
check_42_int2 = v;
});
REQUIRE(check_42_int == 42);
REQUIRE(check_42_int2 == 42);
REQUIRE(call_then_only_once == 1);
}
}
SUBCASE("then_tuple") {
{
double check_42_double = 0.0;
pr::make_resolved_promise()
.then_tuple([](){
return std::make_tuple(
pr::make_resolved_promise(32),
pr::make_resolved_promise(10.0));
}).then([&check_42_double](const std::tuple<int, double>& t){
check_42_double = std::get<0>(t) + std::get<1>(t);
});
REQUIRE(check_42_double == doctest::Approx(42.0).epsilon(0.01));
}
{
double check_42_double = 0.0;
pr::make_resolved_promise(42)
.then_tuple([](int){
return std::make_tuple(
pr::make_resolved_promise(32),
pr::make_resolved_promise(10.0));
}).then([&check_42_double](const std::tuple<int, double>& t){
check_42_double = static_cast<double>(std::get<0>(t)) + std::get<1>(t);
});
REQUIRE(check_42_double == doctest::Approx(42.0).epsilon(0.01));
}
{
bool call_fail_with_logic_error = false;
pr::make_resolved_promise(42)
.then_tuple([](int){
return std::make_tuple(
pr::make_resolved_promise(32),
pr::make_rejected_promise<float>(std::logic_error("hello fail")));
}).except([&call_fail_with_logic_error](std::exception_ptr e){
call_fail_with_logic_error = check_hello_fail_exception(e);
return std::make_tuple(0, 0.f);
});
REQUIRE(call_fail_with_logic_error);
}
}
}
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