48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
// Copyright 2023 Memgraph Ltd.
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//
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// Use of this software is governed by the Business Source License
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// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
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// License, and you may not use this file except in compliance with the Business Source License.
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//
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// As of the Change Date specified in that file, in accordance with
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// the Business Source License, use of this software will be governed
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// by the Apache License, Version 2.0, included in the file
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// licenses/APL.txt.
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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#include "utils/event_histogram.hpp"
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#include "utils/logging.hpp"
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TEST(Histogram, BasicFunctionality) {
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memgraph::metrics::Histogram histo{};
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for (int i = 0; i < 9000; i++) {
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histo.Measure(10);
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}
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for (int i = 0; i < 900; i++) {
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histo.Measure(25);
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}
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for (int i = 0; i < 90; i++) {
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histo.Measure(33);
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}
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for (int i = 0; i < 9; i++) {
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histo.Measure(47);
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}
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histo.Measure(500);
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ASSERT_EQ(histo.Percentile(0.0), 10);
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ASSERT_EQ(histo.Percentile(99.0), 25);
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ASSERT_EQ(histo.Percentile(99.89), 32);
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ASSERT_EQ(histo.Percentile(99.99), 46);
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ASSERT_EQ(histo.Percentile(100.0), 500);
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uint64_t max = std::numeric_limits<uint64_t>::max();
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histo.Measure(max);
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auto observed_max = static_cast<double>(histo.Percentile(100.0));
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auto diff = (max - observed_max) / max;
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ASSERT_NEAR(diff, 0, 0.01);
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}
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