1/*
2 * Copyright 2015-present Facebook, Inc.
3 *
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
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16
17#include <memory>
18#include <unordered_set>
19
20#include <folly/futures/Future.h>
21#include <folly/portability/GTest.h>
22
23using namespace folly;
24
25TEST(Ensure, basic) {
26 size_t count = 0;
27 auto cob = [&] { count++; };
28 auto f = makeFuture(42)
29 .ensure(cob)
30 .thenValue([](int) { throw std::runtime_error("ensure"); })
31 .ensure(cob);
32
33 EXPECT_THROW(std::move(f).get(), std::runtime_error);
34 EXPECT_EQ(2, count);
35}
36
37TEST(Ensure, mutableLambda) {
38 auto set = std::make_shared<std::unordered_set<int>>();
39 set->insert(1);
40 set->insert(2);
41
42 auto f = makeFuture(4)
43 .ensure([set]() mutable { set->clear(); })
44 .thenValue([](auto&&) { throw std::runtime_error("ensure"); });
45
46 EXPECT_EQ(0, set->size());
47 EXPECT_THROW(std::move(f).get(), std::runtime_error);
48}
49