BlackMATov/promise.hpp
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make_all_promise, then_all

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This commit is contained in:
Matvey Cherevko
2018-12-10 04:59:10 +07:00
parent e1af6f13ac
commit 77fa05c3f1
2 changed files with 169 additions and 0 deletions
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83
tests.cpp
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@@ -573,4 +573,87 @@ TEST_CASE("promise") {
REQUIRE(call_fail_with_logic_error);
}
}
SECTION("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_all_promise(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){
++call_then_only_once;
});
p1.resolve(1);
p2.resolve(2);
REQUIRE(call_then_only_once == 1);
}
}
SECTION("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;
}).fail([&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);
}
}
SECTION("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){
check_42_int = std::accumulate(v.begin(), v.end(), 0);
});
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){
check_42_int2 = std::accumulate(v.begin(), v.end(), 0);
});
REQUIRE(check_42_int == 42);
REQUIRE(check_42_int2 == 42);
}
}
}