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- // Copyright 2013 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "remoting/base/running_samples.h"
- #include <stddef.h>
- #include <stdint.h>
- #include "testing/gtest/include/gtest/gtest.h"
- namespace remoting {
- typedef void (*TestFunction)(size_t i, RunningSamples& samples);
- static const int64_t kTestValues[] = { 10, 20, 30, 10, 25, 16, 15 };
- // Test framework that verifies average() and max() at beginning, iterates
- // through all elements and meanwhile calls your own test function
- static void TestFramework(int windowSize, TestFunction testFn) {
- RunningSamples samples(windowSize);
- EXPECT_EQ(0, samples.Average());
- EXPECT_EQ(0, samples.Max());
- for (size_t i = 0; i < std::size(kTestValues); ++i) {
- samples.Record(kTestValues[i]);
- testFn(i, samples);
- }
- }
- // Average across a single element, i.e. just return the most recent.
- TEST(RunningSamplesTest, AverageOneElementWindow) {
- TestFramework(1, [](size_t i, RunningSamples& samples) {
- EXPECT_EQ(static_cast<double>(kTestValues[i]), samples.Average());
- });
- }
- // Average the two most recent elements.
- TEST(RunningSamplesTest, AverageTwoElementWindow) {
- TestFramework(2, [](size_t i, RunningSamples& samples) {
- double expected = kTestValues[i];
- if (i > 0)
- expected = (expected + kTestValues[i-1]) / 2;
- EXPECT_EQ(expected, samples.Average());
- });
- }
- // Average across all the elements if the window size exceeds the element count.
- TEST(RunningSamplesTest, AverageLongWindow) {
- TestFramework(std::size(kTestValues) + 1,
- [](size_t i, RunningSamples& samples) {
- double expected = 0.0;
- for (size_t j = 0; j <= i; ++j)
- expected += kTestValues[j];
- expected /= i + 1;
- EXPECT_EQ(expected, samples.Average());
- });
- }
- // Max of a single element, i.e. just return the most recent.
- TEST(RunningSamplesTest, MaxOneElementWindow) {
- TestFramework(1, [](size_t i, RunningSamples& samples) {
- EXPECT_EQ(static_cast<double>(kTestValues[i]), samples.Max());
- });
- }
- // Max of the two most recent elements.
- TEST(RunningSamplesTest, MaxTwoElementWindow) {
- TestFramework(2, [](size_t i, RunningSamples& samples) {
- double expected = kTestValues[i];
- if (i > 0)
- expected = expected > kTestValues[i-1] ? expected : kTestValues[i-1];
- EXPECT_EQ(expected, samples.Max());
- });
- }
- // Max of all the elements if the window size exceeds the element count.
- TEST(RunningSamplesTest, MaxLongWindow) {
- TestFramework(
- std::size(kTestValues) + 1, [](size_t i, RunningSamples& samples) {
- int64_t expected = -1;
- for (size_t j = 0; j <= i; ++j)
- expected = expected > kTestValues[j] ? expected : kTestValues[j];
- EXPECT_EQ(expected, samples.Max());
- });
- }
- } // namespace remoting
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