/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <memory>
#include <mutex>
#include <folly/futures/Future.h>
#include <folly/portability/GTest.h>
using namespace folly;
TEST(When, predicateFalse) {
int i = 0;
auto thunk = [&] { return makeFuture().thenValue([&](auto&&) { i += 1; }); };
// false
auto f1 = folly::when(false, thunk);
f1.wait();
EXPECT_EQ(0, i);
auto sfThunk = [&] {
return makeSemiFuture().deferValue([&](auto&&) { i += 1; });
};
// false
auto f1s = folly::when(false, sfThunk);
f1s.wait();
EXPECT_EQ(0, i);
}
TEST(When, predicateTrue) {
int i = 0;
auto thunk = [&] { return makeFuture().thenValue([&](auto&&) { i += 1; }); };
// true
auto f2 = folly::when(true, thunk);
f2.wait();
EXPECT_EQ(1, i);
auto sfThunk = [&] {
return makeSemiFuture().deferValue([&](auto&&) { i += 1; });
};
// true
auto f2s = folly::when(true, sfThunk);
f2s.wait();
EXPECT_EQ(2, i);
}