1/*
2 * Copyright 2014-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 <folly/futures/Future.h>
18#include <folly/futures/Promise.h>
19#include <folly/portability/GTest.h>
20#include <folly/synchronization/Baton.h>
21
22using namespace folly;
23
24TEST(Interrupt, raise) {
25 using eggs_t = std::runtime_error;
26 Promise<Unit> p;
27 p.setInterruptHandler([&](const exception_wrapper& e) {
28 EXPECT_THROW(e.throw_exception(), eggs_t);
29 });
30 p.getFuture().raise(eggs_t("eggs"));
31}
32
33TEST(Interrupt, cancel) {
34 Promise<Unit> p;
35 p.setInterruptHandler([&](const exception_wrapper& e) {
36 EXPECT_THROW(e.throw_exception(), FutureCancellation);
37 });
38 p.getFuture().cancel();
39}
40
41TEST(Interrupt, handleThenInterrupt) {
42 Promise<int> p;
43 bool flag = false;
44 p.setInterruptHandler([&](const exception_wrapper& /* e */) { flag = true; });
45 p.getFuture().cancel();
46 EXPECT_TRUE(flag);
47}
48
49TEST(Interrupt, interruptThenHandle) {
50 Promise<int> p;
51 bool flag = false;
52 p.getFuture().cancel();
53 p.setInterruptHandler([&](const exception_wrapper& /* e */) { flag = true; });
54 EXPECT_TRUE(flag);
55}
56
57TEST(Interrupt, interruptAfterFulfilNoop) {
58 Promise<Unit> p;
59 bool flag = false;
60 p.setInterruptHandler([&](const exception_wrapper& /* e */) { flag = true; });
61 p.setValue();
62 p.getFuture().cancel();
63 EXPECT_FALSE(flag);
64}
65
66TEST(Interrupt, secondInterruptNoop) {
67 Promise<Unit> p;
68 int count = 0;
69 p.setInterruptHandler([&](const exception_wrapper& /* e */) { count++; });
70 auto f = p.getFuture();
71 f.cancel();
72 f.cancel();
73 EXPECT_EQ(1, count);
74}
75
76TEST(Interrupt, futureWithinTimedOut) {
77 Promise<int> p;
78 Baton<> done;
79 p.setInterruptHandler([&](const exception_wrapper& /* e */) { done.post(); });
80 p.getFuture().within(std::chrono::milliseconds(1));
81 // Give it 100ms to time out and call the interrupt handler
82 EXPECT_TRUE(done.try_wait_for(std::chrono::milliseconds(100)));
83}
84
85TEST(Interrupt, semiFutureWithinTimedOut) {
86 Promise<int> p;
87 Baton<> done;
88 p.setInterruptHandler([&](const exception_wrapper& /* e */) { done.post(); });
89 p.getSemiFuture().within(std::chrono::milliseconds(1));
90 // Give it 100ms to time out and call the interrupt handler
91 EXPECT_TRUE(done.try_wait_for(std::chrono::milliseconds(100)));
92}
93