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b998473673
Fixes #932 Also fixes #966 Decided not to add Summary type because it has the same functionality as Histogram but makes more calculations on client side (Clio side). See https://prometheus.io/docs/practices/histograms for detailed comparison.
116 lines
4.1 KiB
C++
116 lines
4.1 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of clio: https://github.com/XRPLF/clio
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Copyright (c) 2023, the clio developers.
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#include <util/prometheus/Histogram.h>
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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using namespace util::prometheus;
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struct AnyHistogramTests : ::testing::Test {
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struct MockHistogramImpl {
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MockHistogramImpl()
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{
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EXPECT_CALL(*this, setBuckets);
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}
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using ValueType = std::int64_t;
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MOCK_METHOD(void, observe, (ValueType));
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MOCK_METHOD(void, setBuckets, (std::vector<ValueType> const&));
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MOCK_METHOD(void, serializeValue, (std::string const&, std::string, OStream&), (const));
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};
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::testing::StrictMock<MockHistogramImpl> mockHistogramImpl;
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std::string const name = "test_histogram";
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std::string labelsString = R"({label1="value1",label2="value2"})";
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HistogramInt histogram{name, labelsString, {1, 2, 3}, static_cast<MockHistogramImpl&>(mockHistogramImpl)};
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};
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TEST_F(AnyHistogramTests, name)
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{
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EXPECT_EQ(histogram.name(), name);
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}
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TEST_F(AnyHistogramTests, labelsString)
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{
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EXPECT_EQ(histogram.labelsString(), labelsString);
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}
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TEST_F(AnyHistogramTests, observe)
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{
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EXPECT_CALL(mockHistogramImpl, observe(42));
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histogram.observe(42);
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}
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TEST_F(AnyHistogramTests, serializeValue)
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{
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OStream stream{false};
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EXPECT_CALL(mockHistogramImpl, serializeValue(name, labelsString, ::testing::_));
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histogram.serializeValue(stream);
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}
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struct HistogramTests : ::testing::Test {
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std::string labelsString = R"({label1="value1",label2="value2"})";
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HistogramInt histogram{"t", labelsString, {1, 2, 3}};
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std::string
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serialize() const
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{
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OStream stream{false};
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histogram.serializeValue(stream);
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return std::move(stream).data();
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}
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};
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TEST_F(HistogramTests, observe)
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{
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histogram.observe(0);
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EXPECT_EQ(
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serialize(),
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"1\"} 1\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"2\"} 1\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"3\"} 1\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"+Inf\"} 1\n"
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"t_sum{label1=\"value1\",label2=\"value2\"} 0\n"
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"t_count{label1=\"value1\",label2=\"value2\"} 1\n"
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) << serialize();
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histogram.observe(2);
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EXPECT_EQ(
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serialize(),
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"1\"} 1\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"2\"} 2\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"3\"} 2\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"+Inf\"} 2\n"
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"t_sum{label1=\"value1\",label2=\"value2\"} 2\n"
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"t_count{label1=\"value1\",label2=\"value2\"} 2\n"
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);
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histogram.observe(123);
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EXPECT_EQ(
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serialize(),
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"1\"} 1\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"2\"} 2\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"3\"} 2\n"
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"t_bucket{label1=\"value1\",label2=\"value2\",le=\"+Inf\"} 3\n"
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"t_sum{label1=\"value1\",label2=\"value2\"} 125\n"
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"t_count{label1=\"value1\",label2=\"value2\"} 3\n"
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);
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}
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