// Test of the ETM monitor.
func TestEtmMonitor(t *testing.T) {
assert := audit.NewTestingAssertion(t, true)
// Generate measurings.
for i := 0; i < 500; i++ {
n := rand.Intn(10)
id := fmt.Sprintf("mp:task:%d", n)
m := monitoring.BeginMeasuring(id)
work(n * 5000)
m.EndMeasuring()
}
// Need some time to let that backend catch up queued mesurings.
time.Sleep(time.Millisecond)
// Asserts.
mp, err := monitoring.ReadMeasuringPoint("foo")
assert.ErrorMatch(err, `.* measuring point "foo" does not exist`)
mp, err = monitoring.ReadMeasuringPoint("mp:task:5")
assert.Nil(err, "No error expected.")
assert.Equal(mp.Id, "mp:task:5", "should get the right one")
assert.True(mp.Count > 0, "should be measured several times")
assert.Match(mp.String(), `Measuring Point "mp:task:5" \(.*\)`, "string representation should look fine")
monitoring.MeasuringPointsDo(func(mp *monitoring.MeasuringPoint) {
assert.Match(mp.Id, "mp:task:[0-9]", "id has to match the pattern")
assert.True(mp.MinDuration <= mp.AvgDuration && mp.AvgDuration <= mp.MaxDuration,
"avg should be somewhere between min and max")
})
}
// TestBackendSwitch tests the correct switching between backends.
func TestBackendSwitch(t *testing.T) {
assert := audit.NewTestingAssertion(t, true)
sleep := 10 * time.Millisecond
// First standard.
monitoring.SetBackend(monitoring.NewStandardBackend())
monitoring.Measure("test-a", func() { time.Sleep(sleep) })
time.Sleep(sleep)
mp, err := monitoring.ReadMeasuringPoint("test-a")
assert.Nil(err)
assert.Equal(mp.Count(), int64(1))
assert.True(sleep <= mp.AvgDuration() && mp.AvgDuration() <= 2*sleep)
// Then null.
monitoring.SetBackend(monitoring.NewNullBackend())
monitoring.Measure("test", func() { time.Sleep(sleep) })
mp, err = monitoring.ReadMeasuringPoint("test")
assert.Nil(err)
assert.Equal(mp.ID(), "null")
assert.Equal(mp.Count(), int64(0))
// Finally standard again.
monitoring.SetBackend(monitoring.NewStandardBackend())
monitoring.Measure("test-b", func() { time.Sleep(sleep) })
time.Sleep(sleep)
mp, err = monitoring.ReadMeasuringPoint("test-a")
assert.ErrorMatch(err, `.* measuring point "test-a" does not exist`)
mp, err = monitoring.ReadMeasuringPoint("test-b")
assert.Nil(err)
assert.Equal(mp.Count(), int64(1))
assert.True(sleep <= mp.AvgDuration() && mp.AvgDuration() <= 2*sleep)
}