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vfs: fix race in writeback tests

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This commit is contained in:
Nick Craig-Wood 2020-06-21 10:53:35 +01:00
parent b0fb457746
commit 746c41f527
1 changed files with 32 additions and 27 deletions
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59
vfs/vfscache/writeback_test.go
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@ -24,7 +24,11 @@ func newTestWriteBack(t *testing.T) (wb *writeBack, cancel func()) {
}
// string for debugging - make a copy and pop the items out in order
func (ws writeBackItems) string(t *testing.T) string {
func (wb *writeBack) string(t *testing.T) string {
wb.mu.Lock()
defer wb.mu.Unlock()
ws := wb.items
// check indexes OK first
for i := range ws {
assert.Equal(t, i, ws[i].index, ws[i].name)
@ -50,22 +54,24 @@ func TestWriteBackItems(t *testing.T) {
wbItem2 := writeBackItem{name: "two", expiry: now.Add(2 * time.Second)}
wbItem3 := writeBackItem{name: "three", expiry: now.Add(4 * time.Second)}
ws := writeBackItems{}
wb := &writeBack{
items: writeBackItems{},
}
heap.Init(&ws)
assert.Equal(t, "", ws.string(t))
heap.Push(&ws, &wbItem2)
assert.Equal(t, "two", ws.string(t))
heap.Push(&ws, &wbItem3)
assert.Equal(t, "two,three", ws.string(t))
heap.Push(&ws, &wbItem1)
assert.Equal(t, "one,two,three", ws.string(t))
heap.Init(&wb.items)
assert.Equal(t, "", wb.string(t))
heap.Push(&wb.items, &wbItem2)
assert.Equal(t, "two", wb.string(t))
heap.Push(&wb.items, &wbItem3)
assert.Equal(t, "two,three", wb.string(t))
heap.Push(&wb.items, &wbItem1)
assert.Equal(t, "one,two,three", wb.string(t))
ws._update(&wbItem1, now.Add(3*time.Second))
assert.Equal(t, "two,one,three", ws.string(t))
wb.items._update(&wbItem1, now.Add(3*time.Second))
assert.Equal(t, "two,one,three", wb.string(t))
ws._update(&wbItem1, now.Add(5*time.Second))
assert.Equal(t, "two,three,one", ws.string(t))
wb.items._update(&wbItem1, now.Add(5*time.Second))
assert.Equal(t, "two,three,one", wb.string(t))
}
func checkOnHeap(t *testing.T, wb *writeBack, wbItem *writeBackItem) {
@ -106,7 +112,6 @@ func checkNotInLookup(t *testing.T, wb *writeBack, wbItem *writeBackItem) {
func TestWriteBackItemCRUD(t *testing.T) {
wb, cancel := newTestWriteBack(t)
defer cancel()
ws := &wb.items
item1, item2, item3 := &Item{}, &Item{}, &Item{}
// _peekItem empty
@ -124,7 +129,7 @@ func TestWriteBackItemCRUD(t *testing.T) {
checkOnHeap(t, wb, wbItem3)
checkInLookup(t, wb, wbItem3)
assert.Equal(t, "one,two,three", ws.string(t))
assert.Equal(t, "one,two,three", wb.string(t))
// _delItem
wb._delItem(wbItem2)
@ -142,31 +147,31 @@ func TestWriteBackItemCRUD(t *testing.T) {
assert.Equal(t, wbItem1, poppedWbItem)
checkNotOnHeap(t, wb, wbItem1)
checkInLookup(t, wb, wbItem1)
assert.Equal(t, "two,three", ws.string(t))
assert.Equal(t, "two,three", wb.string(t))
// _pushItem
wb._pushItem(wbItem1)
checkOnHeap(t, wb, wbItem1)
checkInLookup(t, wb, wbItem1)
assert.Equal(t, "one,two,three", ws.string(t))
assert.Equal(t, "one,two,three", wb.string(t))
// push twice
wb._pushItem(wbItem1)
assert.Equal(t, "one,two,three", ws.string(t))
assert.Equal(t, "one,two,three", wb.string(t))
// _peekItem
assert.Equal(t, wbItem1, wb._peekItem())
// _removeItem
assert.Equal(t, "one,two,three", ws.string(t))
assert.Equal(t, "one,two,three", wb.string(t))
wb._removeItem(wbItem2)
checkNotOnHeap(t, wb, wbItem2)
checkInLookup(t, wb, wbItem2)
assert.Equal(t, "one,three", ws.string(t))
assert.Equal(t, "one,three", wb.string(t))
// remove twice
wb._removeItem(wbItem2)
checkNotOnHeap(t, wb, wbItem2)
checkInLookup(t, wb, wbItem2)
assert.Equal(t, "one,three", ws.string(t))
assert.Equal(t, "one,three", wb.string(t))
}
func assertTimerRunning(t *testing.T, wb *writeBack, running bool) {
@ -287,7 +292,7 @@ func TestWriteBackAddOK(t *testing.T) {
wbItem := wb.add(item, "one", true, pi.put)
checkOnHeap(t, wb, wbItem)
checkInLookup(t, wb, wbItem)
assert.Equal(t, "one", wb.items.string(t))
assert.Equal(t, "one", wb.string(t))
<-pi.started
checkNotOnHeap(t, wb, wbItem)
@ -310,7 +315,7 @@ func TestWriteBackAddFailRetry(t *testing.T) {
wbItem := wb.add(item, "one", true, pi.put)
checkOnHeap(t, wb, wbItem)
checkInLookup(t, wb, wbItem)
assert.Equal(t, "one", wb.items.string(t))
assert.Equal(t, "one", wb.string(t))
<-pi.started
checkNotOnHeap(t, wb, wbItem)
@ -343,7 +348,7 @@ func TestWriteBackAddUpdate(t *testing.T) {
wbItem := wb.add(item, "one", true, pi.put)
checkOnHeap(t, wb, wbItem)
checkInLookup(t, wb, wbItem)
assert.Equal(t, "one", wb.items.string(t))
assert.Equal(t, "one", wb.string(t))
<-pi.started
checkNotOnHeap(t, wb, wbItem)
@ -382,7 +387,7 @@ func TestWriteBackAddUpdateNotModified(t *testing.T) {
wbItem := wb.add(item, "one", false, pi.put)
checkOnHeap(t, wb, wbItem)
checkInLookup(t, wb, wbItem)
assert.Equal(t, "one", wb.items.string(t))
assert.Equal(t, "one", wb.string(t))
<-pi.started
checkNotOnHeap(t, wb, wbItem)
@ -421,7 +426,7 @@ func TestWriteBackAddUpdateNotStarted(t *testing.T) {
wbItem := wb.add(item, "one", true, pi.put)
checkOnHeap(t, wb, wbItem)
checkInLookup(t, wb, wbItem)
assert.Equal(t, "one", wb.items.string(t))
assert.Equal(t, "one", wb.string(t))
// Immediately add another upload before the first has started