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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/log/log.h>
LOG_SETUP("job_load_sampler_test");
#include <vespa/searchcore/proton/metrics/job_load_sampler.h>
#include <vespa/vespalib/testkit/testapp.h>
#include <chrono>
using namespace proton;
constexpr double EPS = 0.000001;
using time_point = std::chrono::time_point<std::chrono::steady_clock>;
using std::chrono::duration;
using std::chrono::duration_cast;
using std::chrono::steady_clock;
time_point fakeTime(double now)
{
return time_point(duration_cast<steady_clock::duration>(duration<double>(now)));
}
struct Fixture
{
JobLoadSampler _sampler;
Fixture()
: _sampler(fakeTime(10))
{
}
Fixture &start(double now) {
_sampler.startJob(fakeTime(now));
return *this;
}
Fixture &end(double now) {
_sampler.endJob(fakeTime(now));
return *this;
}
double sample(double now) {
return _sampler.sampleLoad(fakeTime(now));
}
};
TEST_F("require that empty sampler gives 0 load", Fixture)
{
EXPECT_APPROX(0.0, f.sample(11), EPS);
}
TEST_F("require that empty time interval gives 0 load", Fixture)
{
EXPECT_APPROX(0.0, f.sample(10), EPS);
}
TEST_F("require that job that starts and ends in interval gets correct load", Fixture)
{
f.start(12).end(17);
EXPECT_APPROX(0.5, f.sample(20), EPS);
EXPECT_APPROX(0.0, f.sample(21), EPS);
}
TEST_F("require that job that starts in interval gets correct load", Fixture)
{
f.start(12);
EXPECT_APPROX(0.8, f.sample(20), EPS);
EXPECT_APPROX(1.0, f.sample(21), EPS);
}
TEST_F("require that job that ends in interval gets correct load", Fixture)
{
f.start(12).sample(20);
f.end(27);
EXPECT_APPROX(0.7, f.sample(30), EPS);
EXPECT_APPROX(0.0, f.sample(31), EPS);
}
TEST_F("require that job that runs in complete interval gets correct load", Fixture)
{
f.start(12).sample(20);
EXPECT_APPROX(1.0, f.sample(30), EPS);
EXPECT_APPROX(1.0, f.sample(31), EPS);
}
TEST_F("require that multiple jobs that starts and ends in interval gets correct load", Fixture)
{
// job1: 12->17: 0.5
// job2: 14->16: 0.2
f.start(12).start(14).end(16).end(17);
EXPECT_APPROX(0.7, f.sample(20), EPS);
}
TEST_F("require that multiple jobs that starts and ends in several intervals gets correct load", Fixture)
{
// job1: 12->22
// job2: 14->34
// job3: 25->45
f.start(12).start(14);
EXPECT_APPROX(1.4, f.sample(20), EPS);
f.end(22).start(25);
EXPECT_APPROX(1.7, f.sample(30), EPS);
f.end(34);
EXPECT_APPROX(1.4, f.sample(40), EPS);
f.end(45);
EXPECT_APPROX(0.5, f.sample(50), EPS);
}
TEST_MAIN() { TEST_RUN_ALL(); }
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