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.
17 #include <folly/executors/ThreadedExecutor.h>
19 #include <folly/Conv.h>
20 #include <folly/futures/Future.h>
21 #include <folly/gen/Base.h>
22 #include <folly/portability/GTest.h>
26 class ThreadedExecutorTest : public testing::Test {};
29 TEST_F(ThreadedExecutorTest, example) {
30 folly::ThreadedExecutor x;
31 auto ret = folly::via(&x)
32 .then([&] { return 42; })
33 .then([&](int n) { return folly::to<std::string>(n); })
39 TEST_F(ThreadedExecutorTest, dtor_waits) {
40 constexpr auto kDelay = std::chrono::milliseconds(100);
41 auto x = std::make_unique<folly::ThreadedExecutor>();
42 auto fut = folly::via(&*x, [&] { /* sleep override */
43 std::this_thread::sleep_for(kDelay);
47 EXPECT_TRUE(fut.isReady());
50 TEST_F(ThreadedExecutorTest, many) {
51 constexpr auto kNumTasks = 1024;
52 folly::ThreadedExecutor x;
55 folly::gen::range<size_t>(0, kNumTasks) |
56 folly::gen::map([&](size_t i) {
57 return folly::via(&x).then([=] { return i; }).then([](size_t k) {
58 return folly::to<std::string>(k);
61 folly::gen::as<std::vector>())
64 EXPECT_EQ("42", rets[42]);
67 TEST_F(ThreadedExecutorTest, many_sleeping_constant_time) {
68 constexpr auto kNumTasks = 256;
69 constexpr auto kDelay = std::chrono::milliseconds(100);
70 folly::ThreadedExecutor x;
73 folly::gen::range<size_t>(0, kNumTasks) |
74 folly::gen::map([&](size_t i) {
77 /* sleep override */ std::this_thread::sleep_for(kDelay);
79 .then([=] { return i; })
80 .then([](size_t k) { return folly::to<std::string>(k); });
82 folly::gen::as<std::vector>())
85 EXPECT_EQ("42", rets[42]);
88 TEST_F(ThreadedExecutorTest, many_sleeping_decreasing_time) {
89 constexpr auto kNumTasks = 256;
90 constexpr auto kDelay = std::chrono::milliseconds(100);
91 folly::ThreadedExecutor x;
94 folly::gen::range<size_t>(0, kNumTasks) |
95 folly::gen::map([&](size_t i) {
98 auto delay = kDelay * (kNumTasks - i) / kNumTasks;
99 /* sleep override */ std::this_thread::sleep_for(delay);
101 .then([=] { return i; })
102 .then([](size_t k) { return folly::to<std::string>(k); });
104 folly::gen::as<std::vector>())
107 EXPECT_EQ("42", rets[42]);