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promise.hpp/untests/promise1_tests.cpp
BlackMATov 138cba4cfc new build scripts
2023-01-07 06:53:54 +07:00

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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;
}
}
}
TEST_CASE("is_promise") {
SUBCASE("positive") {
static_assert(
pr::is_promise<pr::promise<void>>::value,
"unit test fail");
static_assert(
pr::is_promise<const pr::promise<void>>::value,
"unit test fail");
static_assert(
pr::is_promise<const volatile pr::promise<void>>::value,
"unit test fail");
static_assert(
pr::is_promise<pr::promise<int>>::value,
"unit test fail");
static_assert(
pr::is_promise<const pr::promise<int>>::value,
"unit test fail");
static_assert(
pr::is_promise<const volatile pr::promise<int>>::value,
"unit test fail");
}
SUBCASE("negative") {
static_assert(
!pr::is_promise<pr::promise<void>&>::value,
"unit test fail");
static_assert(
!pr::is_promise<const pr::promise<void>*>::value,
"unit test fail");
static_assert(
!pr::is_promise<const volatile pr::promise<int>&>::value,
"unit test fail");
static_assert(
!pr::is_promise<int>::value,
"unit test fail");
static_assert(
!pr::is_promise<void>::value,
"unit test fail");
static_assert(
!pr::is_promise<const volatile int>::value,
"unit test fail");
}
}
TEST_CASE("is_promise_r") {
SUBCASE("positive") {
static_assert(
pr::is_promise_r<void, pr::promise<void>>::value,
"unit test fail");
static_assert(
pr::is_promise_r<int, const pr::promise<int>>::value,
"unit test fail");
static_assert(
pr::is_promise_r<double, const pr::promise<int>>::value,
"unit test fail");
}
SUBCASE("negative") {
static_assert(
!pr::is_promise_r<void, pr::promise<int>>::value,
"unit test fail");
static_assert(
!pr::is_promise_r<void, const pr::promise<int>>::value,
"unit test fail");
static_assert(
!pr::is_promise_r<int, pr::promise<obj_t>>::value,
"unit test fail");
static_assert(
!pr::is_promise_r<double, int>::value,
"unit test fail");
}
}
TEST_CASE("promise1") {
SUBCASE("basic") {
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
REQUIRE_FALSE(p1 == p2);
REQUIRE(p1 != p2);
REQUIRE((p1 < p2 || p2 < p1));
REQUIRE(p1.hash() != p2.hash());
REQUIRE(p1.hash() == std::hash<pr::promise<int>>()(p1));
}
{
auto p1 = pr::promise<void>();
auto p2 = pr::promise<void>();
REQUIRE_FALSE(p1 == p2);
REQUIRE(p1 != p2);
REQUIRE((p1 < p2 || p2 < p1));
REQUIRE(p1.hash() != p2.hash());
REQUIRE(p1.hash() == std::hash<pr::promise<void>>()(p1));
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
auto p3 = p1;
REQUIRE(p1 == p3);
p3 = p2;
REQUIRE(p2 == p3);
}
{
auto p1 = pr::promise<int>();
auto p2 = pr::promise<int>();
auto p3 = p1;
p1.swap(p2);
REQUIRE(p2 == p3);
REQUIRE_FALSE(p1 == p3);
}
{
auto p1 = pr::promise<void>();
auto p2 = pr::promise<void>();
auto p3 = p1;
p1.swap(p2);
REQUIRE(p2 == p3);
REQUIRE_FALSE(p1 == p3);
}
}
SUBCASE("resolved") {
{
int check_42_int = 0;
auto p = pr::promise<int>();
p.resolve(42);
p.then([&check_42_int](int value){
check_42_int = value;
});
REQUIRE(check_42_int == 42);
}
{
int check_84_int = 0;
bool check_void_call = false;
int check_100500_transform = 0;
auto p = pr::promise<int>();
p.resolve(42);
p.then([](int value){
return value * 2;
}).then([&check_84_int](int value){
check_84_int = value;
}).then([&check_void_call](){
check_void_call = true;
}).then([](){
return 100500;
}).then([&check_100500_transform](int value){
check_100500_transform = value;
});
REQUIRE(check_84_int == 84);
REQUIRE(check_void_call);
REQUIRE(check_100500_transform == 100500);
}
}
SUBCASE("resolved_ref") {
{
int* check_42_int = nullptr;
auto p = pr::promise<std::reference_wrapper<int>>();
int i = 42;
p.resolve(i);
p.then([&check_42_int](int& value) mutable {
check_42_int = &value;
});
REQUIRE(check_42_int);
REQUIRE(*check_42_int == 42);
}
{
const int* check_42_int = nullptr;
auto p = pr::promise<std::reference_wrapper<const int>>();
const int i = 42;
p.resolve(i);
p.then([&check_42_int](const int& value) mutable {
check_42_int = &value;
});
REQUIRE(check_42_int);
REQUIRE(*check_42_int == 42);
}
}
SUBCASE("rejected") {
{
bool call_fail_with_logic_error = false;
bool not_call_then_on_reject = true;
auto p = pr::promise<int>();
p.reject(std::logic_error("hello fail"));
p.then([&not_call_then_on_reject](int value) {
(void)value;
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);
}
{
std::logic_error ee("hello fail");
bool call_fail_with_logic_error = false;
auto p = pr::promise<int>();
p.reject(ee);
p.then([](int){
}).except([&call_fail_with_logic_error](std::exception_ptr e){
call_fail_with_logic_error = check_hello_fail_exception(e);
});
REQUIRE(call_fail_with_logic_error);
}
{
std::logic_error ee("hello fail");
bool call_fail_with_logic_error = false;
auto p = pr::promise<int>();
p.reject(std::make_exception_ptr(ee));
p.then([](int){
}).except([&call_fail_with_logic_error](std::exception_ptr e){
call_fail_with_logic_error = check_hello_fail_exception(e);
});
REQUIRE(call_fail_with_logic_error);
}
{
int check_multi_fail = 0;
auto p = pr::promise<>();
p.reject(std::logic_error("hello fail"));
p.except([&check_multi_fail](std::exception_ptr e){
++check_multi_fail;
std::rethrow_exception(e);
}).except([&check_multi_fail](std::exception_ptr){
++check_multi_fail;
});
REQUIRE(check_multi_fail == 2);
}
}
SUBCASE("unresolved") {
{
int check_42_int = 0;
bool not_call_before_resolve = true;
auto p = pr::promise<int>();
p.then([&not_call_before_resolve](int value){
not_call_before_resolve = false;
return value * 2;
}).then([&check_42_int, &not_call_before_resolve](int value){
not_call_before_resolve = false;
check_42_int = value;
});
REQUIRE(check_42_int == 0);
REQUIRE(not_call_before_resolve);
p.resolve(42);
REQUIRE(check_42_int == 84);
REQUIRE_FALSE(not_call_before_resolve);
}
{
bool not_call_then_on_reject = true;
bool call_fail_with_logic_error = false;
auto p = pr::promise<int>();
p.then([&not_call_then_on_reject](int){
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_FALSE(call_fail_with_logic_error);
p.reject(std::make_exception_ptr(std::logic_error("hello fail")));
REQUIRE(not_call_then_on_reject);
REQUIRE(call_fail_with_logic_error);
}
}
SUBCASE("finally") {
{
bool all_is_ok = false;
auto p = pr::promise<int>();
p.finally([&all_is_ok](){
all_is_ok = true;
});
REQUIRE_FALSE(all_is_ok);
p.resolve(1);
REQUIRE(all_is_ok);
}
{
bool all_is_ok = false;
auto p = pr::promise<int>();
p.finally([&all_is_ok](){
all_is_ok = true;
});
REQUIRE_FALSE(all_is_ok);
p.reject(std::make_exception_ptr(std::logic_error("hello fail")));
REQUIRE(all_is_ok);
}
{
bool all_is_ok = false;
pr::make_resolved_promise(1)
.finally([&all_is_ok](){
all_is_ok = true;
});
REQUIRE(all_is_ok);
}
{
bool all_is_ok = false;
pr::make_rejected_promise<int>(std::logic_error("hello fail"))
.finally([&all_is_ok](){
all_is_ok = true;
});
REQUIRE(all_is_ok);
}
}
SUBCASE("after_finally") {
{
int check_84_int = 0;
auto p = pr::promise<>();
p.finally([&check_84_int](){
check_84_int = 42;
return 100500;
}).then([&check_84_int](){
check_84_int *= 2;
});
REQUIRE(check_84_int == 0);
p.resolve();
REQUIRE(check_84_int == 84);
}
{
int check_84_int = 0;
auto p = pr::promise<>();
p.finally([&check_84_int](){
check_84_int = 42;
return 100500;
}).except([&check_84_int](std::exception_ptr){
check_84_int *= 2;
});
REQUIRE(check_84_int == 0);
p.reject(std::make_exception_ptr(std::logic_error("hello fail")));
REQUIRE(check_84_int == 84);
}
}
SUBCASE("failed_finally") {
{
int check_84_int = 0;
auto p = pr::promise<>();
p.finally([&check_84_int](){
check_84_int += 42;
throw std::logic_error("hello fail");
}).except([&check_84_int](std::exception_ptr e){
if ( check_hello_fail_exception(e) ) {
check_84_int += 42;
}
});
p.resolve();
REQUIRE(check_84_int == 84);
}
{
int check_84_int = 0;
auto p = pr::promise<>();
p.finally([&check_84_int](){
check_84_int += 42;
throw std::logic_error("hello fail");
}).except([&check_84_int](std::exception_ptr e){
if ( check_hello_fail_exception(e) ) {
check_84_int += 42;
}
});
p.reject(std::make_exception_ptr(std::logic_error("hello")));
REQUIRE(check_84_int == 84);
}
{
int check_84_int = 0;
auto p = pr::promise<int>();
p.finally([&check_84_int](){
check_84_int += 42;
throw std::logic_error("hello fail");
}).except([&check_84_int](std::exception_ptr e) -> int {
if ( check_hello_fail_exception(e) ) {
check_84_int += 42;
}
return 0;
});
p.resolve(1);
REQUIRE(check_84_int == 84);
}
{
int check_84_int = 0;
auto p = pr::promise<int>();
p.finally([&check_84_int](){
check_84_int += 42;
throw std::logic_error("hello fail");
}).except([&check_84_int](std::exception_ptr e) -> int {
if ( check_hello_fail_exception(e) ) {
check_84_int += 42;
}
return 0;
});
p.reject(std::make_exception_ptr(std::logic_error("hello")));
REQUIRE(check_84_int == 84);
}
}
}
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