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| 1 | +/* |
| 2 | +Copyright 2024 The Kubernetes Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, |
| 11 | +software distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package latencytracker |
| 18 | + |
| 19 | +import ( |
| 20 | + "sync" |
| 21 | + "testing" |
| 22 | + "time" |
| 23 | +) |
| 24 | + |
| 25 | +func TestUpdateStateWithUnneededList_AddsNewNodes(t *testing.T) { |
| 26 | + tracker := NewNodeLatencyTracker() |
| 27 | + now := time.Now() |
| 28 | + node := NodeInfo{Name: "node1", UnneededSince: now, Threshold: 5 * time.Minute} |
| 29 | + |
| 30 | + tracker.UpdateStateWithUnneededList([]NodeInfo{node}, now) |
| 31 | + |
| 32 | + tracker.Lock() |
| 33 | + defer tracker.Unlock() |
| 34 | + if _, ok := tracker.nodes["node1"]; !ok { |
| 35 | + t.Errorf("expected node1 to be tracked, but was not") |
| 36 | + } |
| 37 | +} |
| 38 | + |
| 39 | +func TestUpdateStateWithUnneededList_DoesNotDuplicate(t *testing.T) { |
| 40 | + tracker := NewNodeLatencyTracker() |
| 41 | + now := time.Now() |
| 42 | + node := NodeInfo{Name: "node1", UnneededSince: now, Threshold: 5 * time.Minute} |
| 43 | + |
| 44 | + tracker.UpdateStateWithUnneededList([]NodeInfo{node}, now) |
| 45 | + tracker.UpdateStateWithUnneededList([]NodeInfo{node}, now.Add(time.Minute)) |
| 46 | + |
| 47 | + tracker.Lock() |
| 48 | + defer tracker.Unlock() |
| 49 | + if len(tracker.nodes) != 1 { |
| 50 | + t.Errorf("expected 1 tracked node, got %d", len(tracker.nodes)) |
| 51 | + } |
| 52 | +} |
| 53 | + |
| 54 | +func TestObserveDeletion_RemovesNode(t *testing.T) { |
| 55 | + tracker := NewNodeLatencyTracker() |
| 56 | + now := time.Now() |
| 57 | + node := NodeInfo{ |
| 58 | + Name: "node1", |
| 59 | + UnneededSince: now.Add(-10 * time.Minute), |
| 60 | + Threshold: 5 * time.Minute, |
| 61 | + } |
| 62 | + tracker.UpdateStateWithUnneededList([]NodeInfo{node}, now) |
| 63 | + |
| 64 | + tracker.ObserveDeletion("node1", now) |
| 65 | + |
| 66 | + tracker.Lock() |
| 67 | + defer tracker.Unlock() |
| 68 | + if _, ok := tracker.nodes["node1"]; ok { |
| 69 | + t.Errorf("expected node1 removed after ObserveDeletion") |
| 70 | + } |
| 71 | +} |
| 72 | + |
| 73 | +func TestObserveDeletion_NoOpIfNodeNotTracked(t *testing.T) { |
| 74 | + tracker := NewNodeLatencyTracker() |
| 75 | + now := time.Now() |
| 76 | + |
| 77 | + tracker.ObserveDeletion("node1", now) |
| 78 | + |
| 79 | + tracker.Lock() |
| 80 | + defer tracker.Unlock() |
| 81 | + if len(tracker.nodes) != 0 { |
| 82 | + t.Errorf("expected no nodes tracked, got %d", len(tracker.nodes)) |
| 83 | + } |
| 84 | +} |
| 85 | + |
| 86 | +func TestConcurrentUpdatesAndDeletions(t *testing.T) { |
| 87 | + tracker := NewNodeLatencyTracker() |
| 88 | + now := time.Now() |
| 89 | + |
| 90 | + node := NodeInfo{ |
| 91 | + Name: "node1", |
| 92 | + UnneededSince: now, |
| 93 | + Threshold: 2 * time.Minute, |
| 94 | + } |
| 95 | + |
| 96 | + var wg sync.WaitGroup |
| 97 | + stop := make(chan struct{}) |
| 98 | + |
| 99 | + wg.Add(1) |
| 100 | + go func() { |
| 101 | + defer wg.Done() |
| 102 | + for { |
| 103 | + select { |
| 104 | + case <-stop: |
| 105 | + return |
| 106 | + default: |
| 107 | + tracker.UpdateStateWithUnneededList([]NodeInfo{node}, time.Now()) |
| 108 | + } |
| 109 | + } |
| 110 | + }() |
| 111 | + |
| 112 | + wg.Add(1) |
| 113 | + go func() { |
| 114 | + defer wg.Done() |
| 115 | + for { |
| 116 | + select { |
| 117 | + case <-stop: |
| 118 | + return |
| 119 | + default: |
| 120 | + tracker.ObserveDeletion("node1", time.Now()) |
| 121 | + } |
| 122 | + } |
| 123 | + }() |
| 124 | + |
| 125 | + time.Sleep(50 * time.Millisecond) |
| 126 | + close(stop) |
| 127 | + wg.Wait() |
| 128 | + |
| 129 | + tracker.Lock() |
| 130 | + defer tracker.Unlock() |
| 131 | + if len(tracker.nodes) > 1 { |
| 132 | + t.Errorf("expected at most 1 tracked node, got %d", len(tracker.nodes)) |
| 133 | + } |
| 134 | +} |
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