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Fix race in TestGoCollectorMemStats 

Related to #573 (but only partially fixes it).

Signed-off-by: beorn7 <bjoern@rabenste.in>
This commit is contained in:
beorn7 2019-05-16 10:37:37 +02:00
parent 2827f2a8d9
commit 709dc4b1de
1 changed files with 8 additions and 0 deletions
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8
prometheus/go_collector_test.go
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@ -196,9 +196,11 @@ func TestGoCollectorMemStats(t *testing.T) {
} }
checkCollect(1) checkCollect(1)
// Now msLast is set. // Now msLast is set.
c.msMtx.Lock()
if want, got := uint64(1), c.msLast.Alloc; want != got { if want, got := uint64(1), c.msLast.Alloc; want != got {
t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got) t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got)
} }
c.msMtx.Unlock()
// Scenario 2: msRead responds fast, previous memstats available, new // Scenario 2: msRead responds fast, previous memstats available, new
// value collected. // value collected.
@ -207,9 +209,11 @@ func TestGoCollectorMemStats(t *testing.T) {
} }
checkCollect(2) checkCollect(2)
// msLast is set, too. // msLast is set, too.
c.msMtx.Lock()
if want, got := uint64(2), c.msLast.Alloc; want != got { if want, got := uint64(2), c.msLast.Alloc; want != got {
t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got) t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got)
} }
c.msMtx.Unlock()
// Scenario 3: msRead responds slowly, previous memstats available, old // Scenario 3: msRead responds slowly, previous memstats available, old
// value collected. // value collected.
@ -220,9 +224,11 @@ func TestGoCollectorMemStats(t *testing.T) {
checkCollect(2) checkCollect(2)
// After waiting, new value is still set in msLast. // After waiting, new value is still set in msLast.
time.Sleep(12 * time.Millisecond) time.Sleep(12 * time.Millisecond)
c.msMtx.Lock()
if want, got := uint64(3), c.msLast.Alloc; want != got { if want, got := uint64(3), c.msLast.Alloc; want != got {
t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got) t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got)
} }
c.msMtx.Unlock()
// Scenario 4: msRead responds slowly, previous memstats is too old, new // Scenario 4: msRead responds slowly, previous memstats is too old, new
// value collected. // value collected.
@ -231,7 +237,9 @@ func TestGoCollectorMemStats(t *testing.T) {
ms.Alloc = 4 ms.Alloc = 4
} }
checkCollect(4) checkCollect(4)
c.msMtx.Lock()
if want, got := uint64(4), c.msLast.Alloc; want != got { if want, got := uint64(4), c.msLast.Alloc; want != got {
t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got) t.Errorf("unexpected of msLast.Alloc, want %d, got %d", want, got)
} }
c.msMtx.Unlock()
} }