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#include "async-collect.hh"
#include <gtest/gtest.h>
#include <kj/array.h>
#include <kj/async.h>
#include <kj/exception.h>
#include <stdexcept>
namespace nix {
TEST(AsyncCollect, void)
{
kj::EventLoop loop;
kj::WaitScope waitScope(loop);
auto a = kj::newPromiseAndFulfiller<void>();
auto b = kj::newPromiseAndFulfiller<void>();
auto c = kj::newPromiseAndFulfiller<void>();
auto d = kj::newPromiseAndFulfiller<void>();
auto collect = asyncCollect(kj::arr(
std::pair(1, std::move(a.promise)),
std::pair(2, std::move(b.promise)),
std::pair(3, std::move(c.promise)),
std::pair(4, std::move(d.promise))
));
auto p = collect.next();
ASSERT_FALSE(p.poll(waitScope));
// collection is ordered
c.fulfiller->fulfill();
b.fulfiller->fulfill();
ASSERT_TRUE(p.poll(waitScope));
ASSERT_EQ(p.wait(waitScope), 3);
p = collect.next();
ASSERT_TRUE(p.poll(waitScope));
ASSERT_EQ(p.wait(waitScope), 2);
p = collect.next();
ASSERT_FALSE(p.poll(waitScope));
// exceptions propagate
a.fulfiller->rejectIfThrows([] { throw std::runtime_error("test"); });
p = collect.next();
ASSERT_TRUE(p.poll(waitScope));
ASSERT_THROW(p.wait(waitScope), kj::Exception);
// first exception aborts collection
p = collect.next();
ASSERT_TRUE(p.poll(waitScope));
ASSERT_THROW(p.wait(waitScope), kj::Exception);
}
TEST(AsyncCollect, nonVoid)
{
kj::EventLoop loop;
kj::WaitScope waitScope(loop);
auto a = kj::newPromiseAndFulfiller<int>();
auto b = kj::newPromiseAndFulfiller<int>();
auto c = kj::newPromiseAndFulfiller<int>();
auto d = kj::newPromiseAndFulfiller<int>();
auto collect = asyncCollect(kj::arr(
std::pair(1, std::move(a.promise)),
std::pair(2, std::move(b.promise)),
std::pair(3, std::move(c.promise)),
std::pair(4, std::move(d.promise))
));
auto p = collect.next();
ASSERT_FALSE(p.poll(waitScope));
// collection is ordered
c.fulfiller->fulfill(1);
b.fulfiller->fulfill(2);
ASSERT_TRUE(p.poll(waitScope));
ASSERT_EQ(p.wait(waitScope), std::pair(3, 1));
p = collect.next();
ASSERT_TRUE(p.poll(waitScope));
ASSERT_EQ(p.wait(waitScope), std::pair(2, 2));
p = collect.next();
ASSERT_FALSE(p.poll(waitScope));
// exceptions propagate
a.fulfiller->rejectIfThrows([] { throw std::runtime_error("test"); });
p = collect.next();
ASSERT_TRUE(p.poll(waitScope));
ASSERT_THROW(p.wait(waitScope), kj::Exception);
// first exception aborts collection
p = collect.next();
ASSERT_TRUE(p.poll(waitScope));
ASSERT_THROW(p.wait(waitScope), kj::Exception);
}
}
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