| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package pinger |
| 4 | |
| 5 | import ( |
| 6 | "testing" |
| 7 | "time" |
| 8 | |
| 9 | "github.com/stretchr/testify/assert" |
| 10 | ) |
| 11 | |
| 12 | func TestCalcMeanJitter(t *testing.T) { |
| 13 | tests := map[string]struct { |
| 14 | rtts []time.Duration |
| 15 | want time.Duration |
| 16 | }{ |
| 17 | "empty": { |
| 18 | want: 0, |
| 19 | }, |
| 20 | "single": { |
| 21 | rtts: []time.Duration{10 * time.Millisecond}, |
| 22 | want: 0, |
| 23 | }, |
| 24 | "two samples": { |
| 25 | rtts: []time.Duration{10 * time.Millisecond, 15 * time.Millisecond}, |
| 26 | want: 5 * time.Millisecond, |
| 27 | }, |
| 28 | "five samples": { |
| 29 | rtts: []time.Duration{ |
| 30 | 10 * time.Millisecond, |
| 31 | 12 * time.Millisecond, |
| 32 | 15 * time.Millisecond, |
| 33 | 18 * time.Millisecond, |
| 34 | 20 * time.Millisecond, |
| 35 | }, |
| 36 | want: 2500 * time.Microsecond, |
| 37 | }, |
| 38 | } |
| 39 | |
| 40 | for name, tc := range tests { |
| 41 | t.Run(name, func(t *testing.T) { |
| 42 | assert.Equal(t, tc.want, calcMeanJitter(tc.rtts)) |
| 43 | }) |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | func TestStateStore_Update(t *testing.T) { |
| 48 | state := newStateStore() |
| 49 | cfg := AnalysisConfig{ |
| 50 | JitterEWMASamples: 16, |
| 51 | JitterSMAWindow: 3, |
| 52 | } |
| 53 | |
| 54 | ewma, sma := state.update("host", 2500*time.Microsecond, cfg) |
| 55 | assert.Equal(t, time.Duration(156250), ewma) |
| 56 | assert.Equal(t, 2500*time.Microsecond, sma) |
| 57 | |
| 58 | ewma, sma = state.update("host", 2500*time.Microsecond, cfg) |
| 59 | assert.Equal(t, time.Duration(302734), ewma) |
| 60 | assert.Equal(t, 2500*time.Microsecond, sma) |
| 61 | |
| 62 | _, sma = state.update("host", 4000*time.Microsecond, cfg) |
| 63 | assert.Equal(t, time.Duration(3000000), sma) |
| 64 | } |
| 65 | |
| 66 | func TestRTTSummaryVariance(t *testing.T) { |
| 67 | rtt := RTTSummary{ |
| 68 | Valid: true, |
| 69 | StdDev: 5 * time.Millisecond, |
| 70 | } |
| 71 | |
| 72 | assert.Equal(t, int64(25000000), rtt.VarianceMicrosecondsSquared()) |
| 73 | assert.InDelta(t, 25.0, rtt.VarianceMillisecondsSquared(), 1e-9) |
| 74 | } |