2 * Copyright 2017 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include <unordered_set>
20 #include <folly/futures/Future.h>
21 #include <folly/portability/GTest.h>
23 using namespace folly;
27 auto cob = [&] { count++; };
28 auto f = makeFuture(42)
30 .then([](int) { throw std::runtime_error("ensure"); })
33 EXPECT_THROW(f.get(), std::runtime_error);
37 TEST(Ensure, mutableLambda) {
38 auto set = std::make_shared<std::unordered_set<int>>();
42 auto f = makeFuture(4)
43 .ensure([set]() mutable { set->clear(); })
44 .then([]() { throw std::runtime_error("ensure"); });
46 EXPECT_EQ(0, set->size());
47 EXPECT_THROW(f.get(), std::runtime_error);