1/*
2 * Copyright 2018-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/stats/detail/SlidingWindow-defs.h>
18
19#include <folly/portability/GTest.h>
20
21using namespace folly;
22using namespace folly::detail;
23
24class SlidingWindowTest : public ::testing::Test {
25 protected:
26 std::unique_ptr<SlidingWindow<size_t>> slidingWindow;
27 size_t curWindow = 0;
28
29 void SetUp() override {
30 slidingWindow = std::make_unique<SlidingWindow<size_t>>(
31 [&]() { return curWindow++; }, 60);
32 }
33};
34
35TEST_F(SlidingWindowTest, Constructor) {
36 auto buckets = slidingWindow->get();
37 EXPECT_EQ(60, buckets.size());
38
39 for (size_t i = 0; i < 60; ++i) {
40 EXPECT_EQ(60 - i - 1, buckets[i]);
41 }
42}
43
44TEST_F(SlidingWindowTest, SlideZero) {
45 slidingWindow->slide(0);
46 auto buckets = slidingWindow->get();
47 EXPECT_EQ(60, buckets.size());
48
49 for (size_t i = 0; i < 60; ++i) {
50 EXPECT_EQ(60 - i - 1, buckets[i]);
51 }
52}
53
54TEST_F(SlidingWindowTest, SlideLessThanFullAmount) {
55 slidingWindow->slide(5);
56 auto buckets = slidingWindow->get();
57 EXPECT_EQ(60, buckets.size());
58
59 for (size_t i = 0; i < 60; ++i) {
60 EXPECT_EQ(65 - i - 1, buckets[i]);
61 }
62}
63
64TEST_F(SlidingWindowTest, SlideMoreThanFullAmount) {
65 slidingWindow->slide(60);
66 auto buckets = slidingWindow->get();
67 EXPECT_EQ(60, buckets.size());
68
69 for (size_t i = 0; i < 60; ++i) {
70 EXPECT_EQ(120 - i - 1, buckets[i]);
71 }
72}
73