mirror of https://github.com/rclone/rclone
123 lines
2.5 KiB
Go
123 lines
2.5 KiB
Go
package sync
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import (
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"context"
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"sync"
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"sync/atomic"
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"testing"
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"github.com/ncw/rclone/fs"
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"github.com/ncw/rclone/fstest/mockobject"
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"github.com/stretchr/testify/assert"
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)
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func TestPipe(t *testing.T) {
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var queueLength int
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var queueSize int64
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stats := func(n int, size int64) {
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queueLength, queueSize = n, size
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}
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// Make a new pipe
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p := newPipe(stats, 10)
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checkStats := func(expectedN int, expectedSize int64) {
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n, size := p.Stats()
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assert.Equal(t, expectedN, n)
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assert.Equal(t, expectedSize, size)
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assert.Equal(t, expectedN, queueLength)
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assert.Equal(t, expectedSize, queueSize)
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}
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checkStats(0, 0)
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ctx := context.Background()
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obj1 := mockobject.New("potato").WithContent([]byte("hello"), mockobject.SeekModeNone)
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pair1 := fs.ObjectPair{Src: obj1, Dst: nil}
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// Put an object
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ok := p.Put(ctx, pair1)
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assert.Equal(t, true, ok)
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checkStats(1, 5)
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// Close the pipe showing reading on closed pipe is OK
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p.Close()
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// Read from pipe
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pair2, ok := p.Get(ctx)
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assert.Equal(t, pair1, pair2)
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assert.Equal(t, true, ok)
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checkStats(0, 0)
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// Check read on closed pipe
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pair2, ok = p.Get(ctx)
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assert.Equal(t, fs.ObjectPair{}, pair2)
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assert.Equal(t, false, ok)
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// Check panic on write to closed pipe
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assert.Panics(t, func() { p.Put(ctx, pair1) })
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// Make a new pipe
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p = newPipe(stats, 10)
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ctx2, cancel := context.WithCancel(ctx)
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// cancel it in the background - check read ceases
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go cancel()
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pair2, ok = p.Get(ctx2)
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assert.Equal(t, fs.ObjectPair{}, pair2)
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assert.Equal(t, false, ok)
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// check we can't write
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ok = p.Put(ctx2, pair1)
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assert.Equal(t, false, ok)
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}
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// TestPipeConcurrent runs concurrent Get and Put to flush out any
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// race conditions and concurrency problems.
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func TestPipeConcurrent(t *testing.T) {
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const (
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N = 1000
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readWriters = 10
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)
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stats := func(n int, size int64) {}
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// Make a new pipe
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p := newPipe(stats, 10)
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var wg sync.WaitGroup
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obj1 := mockobject.New("potato").WithContent([]byte("hello"), mockobject.SeekModeNone)
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pair1 := fs.ObjectPair{Src: obj1, Dst: nil}
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ctx := context.Background()
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var count int64
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for j := 0; j < readWriters; j++ {
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wg.Add(2)
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go func() {
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defer wg.Done()
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for i := 0; i < N; i++ {
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// Read from pipe
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pair2, ok := p.Get(ctx)
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assert.Equal(t, pair1, pair2)
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assert.Equal(t, true, ok)
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atomic.AddInt64(&count, -1)
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}
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}()
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go func() {
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defer wg.Done()
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for i := 0; i < N; i++ {
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// Put an object
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ok := p.Put(ctx, pair1)
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assert.Equal(t, true, ok)
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atomic.AddInt64(&count, 1)
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}
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}()
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}
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wg.Wait()
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assert.Equal(t, int64(0), count)
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}
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