mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2025-04-21 11:57:04 +02:00
288821cd22
* change the histogram aggregator to have a consistent but blocking Checkpoint() * docs * wrapping docs * remove currentIdx from the 8bit alignment check * stress test * add export and move lockfreewrite algorithm to an external struct. * move state locker to another package. * add todos * minimal tests * renaming and docs * change to context.Background() * add link to algorithm and grammars Co-authored-by: Joshua MacDonald <jmacd@users.noreply.github.com>
89 lines
1.8 KiB
Go
89 lines
1.8 KiB
Go
package internal
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import (
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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func TestInflightOperationMustEndBeforeSwap(t *testing.T) {
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var swapped bool
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ch := make(chan struct{})
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l := StateLocker{}
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op1 := l.Start()
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go func() {
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l.SwapActiveState(func() {})
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swapped = true
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ch <- struct{}{}
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}()
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require.False(t, swapped, "Swap should wait the end of the in-flight operation.")
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l.End(op1)
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select {
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case <-ch:
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require.True(t, swapped, "Swap should've been completed. ")
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case <-time.After(50 * time.Millisecond):
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t.Fatal("Swap was not concluded after 50 milliseconds.")
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}
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}
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func TestEnsureIndexIsConsistent(t *testing.T) {
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l := StateLocker{}
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op1 := l.Start()
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l.End(op1)
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l.SwapActiveState(func() {})
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op2 := l.Start()
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l.End(op2)
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op3 := l.Start()
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l.End(op3)
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l.SwapActiveState(func() {})
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op4 := l.Start()
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l.End(op4)
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require.Equal(t, op1, op4, "two operations separated by two swaps should have the same index.")
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require.Equal(t, op2, op3, "two operations with no swap in between should have the same index.")
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require.Equal(t, 0, op1, "first index should be 0")
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require.Equal(t, 1, op2, "second index should be 1")
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}
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func TestTwoSwapsCanHappenWithoutOperationsInBetween(t *testing.T) {
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l := StateLocker{}
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require.Equal(t, 1, l.ColdIdx(), "first cold index should be 1")
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l.SwapActiveState(func() {})
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require.Equal(t, 0, l.ColdIdx(), "second cold index should be 0")
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l.SwapActiveState(func() {})
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require.Equal(t, 1, l.ColdIdx(), "third cold index should be 1")
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}
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func BenchmarkStateLocker_StartEnd(b *testing.B) {
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l := StateLocker{}
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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l.End(l.Start())
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}
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}
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func BenchmarkStateLocker_SwapActiveState(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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l := StateLocker{}
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l.SwapActiveState(func() {})
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}
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}
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