| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package pipeline |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | "testing" |
| 8 | "time" |
| 9 | |
| 10 | "github.com/netdata/netdata/go/plugins/logger" |
| 11 | "github.com/netdata/netdata/go/plugins/plugin/agent/discovery/sd/model" |
| 12 | |
| 13 | "github.com/stretchr/testify/assert" |
| 14 | "github.com/stretchr/testify/require" |
| 15 | ) |
| 16 | |
| 17 | type accumulatorDiscoverer func(context.Context, chan<- []model.TargetGroup) |
| 18 | |
| 19 | func (fn accumulatorDiscoverer) Discover(ctx context.Context, ch chan<- []model.TargetGroup) { |
| 20 | fn(ctx, ch) |
| 21 | } |
| 22 | |
| 23 | func TestAccumulator_Run_FlushesPendingGroupsWhenDiscoverersExit(t *testing.T) { |
| 24 | accum := newAccumulator() |
| 25 | accum.Logger = logger.New() |
| 26 | accum.sendEvery = time.Hour |
| 27 | accum.discoverers = []model.Discoverer{ |
| 28 | accumulatorDiscoverer(func(_ context.Context, ch chan<- []model.TargetGroup) { |
| 29 | ch <- []model.TargetGroup{newMockTargetGroup("test", "mock1")} |
| 30 | }), |
| 31 | } |
| 32 | |
| 33 | ctx := t.Context() |
| 34 | |
| 35 | updates := make(chan []model.TargetGroup) |
| 36 | done := make(chan struct{}) |
| 37 | go func() { |
| 38 | defer close(done) |
| 39 | accum.run(ctx, updates) |
| 40 | }() |
| 41 | |
| 42 | time.Sleep(100 * time.Millisecond) |
| 43 | |
| 44 | select { |
| 45 | case got := <-updates: |
| 46 | require.Len(t, got, 1) |
| 47 | assert.Equal(t, "test", got[0].Source()) |
| 48 | case <-time.After(time.Second): |
| 49 | t.Fatal("timed out waiting for final accumulator flush") |
| 50 | } |
| 51 | |
| 52 | select { |
| 53 | case <-done: |
| 54 | case <-time.After(time.Second): |
| 55 | t.Fatal("accumulator did not exit after delivering final flush") |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | func TestAccumulator_Run_ExitsOnCancelWhenFinalFlushBlocks(t *testing.T) { |
| 60 | accum := newAccumulator() |
| 61 | accum.Logger = logger.New() |
| 62 | accum.sendEvery = time.Hour |
| 63 | accum.discoverers = []model.Discoverer{ |
| 64 | accumulatorDiscoverer(func(_ context.Context, ch chan<- []model.TargetGroup) { |
| 65 | ch <- []model.TargetGroup{newMockTargetGroup("test", "mock1")} |
| 66 | }), |
| 67 | } |
| 68 | |
| 69 | ctx, cancel := context.WithCancel(context.Background()) |
| 70 | updates := make(chan []model.TargetGroup) |
| 71 | done := make(chan struct{}) |
| 72 | go func() { |
| 73 | defer close(done) |
| 74 | accum.run(ctx, updates) |
| 75 | }() |
| 76 | |
| 77 | time.Sleep(100 * time.Millisecond) |
| 78 | |
| 79 | select { |
| 80 | case <-done: |
| 81 | t.Fatal("accumulator exited before cancellation instead of waiting for the final flush receiver") |
| 82 | default: |
| 83 | } |
| 84 | |
| 85 | cancel() |
| 86 | |
| 87 | select { |
| 88 | case <-done: |
| 89 | case <-time.After(time.Second): |
| 90 | t.Fatal("accumulator did not exit after cancellation") |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | func TestAccumulator_FinalSend_PrefersReadyReceiverAfterCancel(t *testing.T) { |
| 95 | accum := newAccumulator() |
| 96 | accum.groupsUpdate([]model.TargetGroup{newMockTargetGroup("test", "mock1")}) |
| 97 | |
| 98 | ctx, cancel := context.WithCancel(context.Background()) |
| 99 | cancel() |
| 100 | |
| 101 | updates := make(chan []model.TargetGroup, 1) |
| 102 | |
| 103 | accum.finalSend(ctx, updates) |
| 104 | |
| 105 | select { |
| 106 | case got := <-updates: |
| 107 | require.Len(t, got, 1) |
| 108 | assert.Equal(t, "test", got[0].Source()) |
| 109 | case <-time.After(time.Second): |
| 110 | t.Fatal("timed out waiting for canceled finalSend delivery") |
| 111 | } |
| 112 | } |