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 <mutex> |
19 | |
20 | #include <folly/futures/Future.h> |
21 | #include <folly/portability/GTest.h> |
22 | |
23 | using namespace folly; |
24 | |
25 | TEST(When, predicateFalse) { |
26 | int i = 0; |
27 | auto thunk = [&] { return makeFuture().thenValue([&](auto&&) { i += 1; }); }; |
28 | |
29 | // false |
30 | auto f1 = folly::when(false, thunk); |
31 | f1.wait(); |
32 | EXPECT_EQ(0, i); |
33 | } |
34 | |
35 | TEST(When, predicateTrue) { |
36 | int i = 0; |
37 | auto thunk = [&] { return makeFuture().thenValue([&](auto&&) { i += 1; }); }; |
38 | |
39 | // true |
40 | auto f2 = folly::when(true, thunk); |
41 | f2.wait(); |
42 | EXPECT_EQ(1, i); |
43 | } |
44 | |