mirror of https://github.com/k3s-io/k3s
84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"math/rand"
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"sync"
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"testing"
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"time"
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)
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func ExpectValue(t *testing.T, atomicValue *AtomicValue, expectedValue interface{}) {
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actualValue := atomicValue.Load()
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if actualValue != expectedValue {
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t.Errorf("Expected to find %v, found %v", expectedValue, actualValue)
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}
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ch := make(chan interface{})
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go func() {
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ch <- atomicValue.Load()
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}()
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select {
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case actualValue = <-ch:
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if actualValue != expectedValue {
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t.Errorf("Expected to find %v, found %v", expectedValue, actualValue)
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return
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}
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case <-time.After(time.Second * 5):
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t.Error("Value could not be read")
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return
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}
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}
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func TestAtomicValue(t *testing.T) {
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atomicValue := &AtomicValue{}
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ExpectValue(t, atomicValue, nil)
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atomicValue.Store(10)
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ExpectValue(t, atomicValue, 10)
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}
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func TestHighWaterMark(t *testing.T) {
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var h HighWaterMark
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for i := int64(10); i < 20; i++ {
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if !h.Check(i) {
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t.Errorf("unexpected false for %v", i)
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}
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if h.Check(i - 1) {
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t.Errorf("unexpected true for %v", i-1)
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}
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}
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m := int64(0)
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wg := sync.WaitGroup{}
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for i := 0; i < 300; i++ {
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wg.Add(1)
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v := rand.Int63()
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go func(v int64) {
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defer wg.Done()
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h.Check(v)
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}(v)
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if v > m {
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m = v
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}
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}
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wg.Wait()
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if m != int64(h) {
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t.Errorf("unexpected value, wanted %v, got %v", m, int64(h))
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}
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}
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