51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
// Copyright 2022 PingCAP, Inc.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package gctuner
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import (
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"runtime"
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"sync/atomic"
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"testing"
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"github.com/stretchr/testify/require"
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)
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type testState struct {
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count int32
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}
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func TestFinalizer(t *testing.T) {
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maxCount := int32(16)
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state := &testState{}
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f := newFinalizer(func() {
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n := atomic.AddInt32(&state.count, 1)
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if n > maxCount {
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t.Fatalf("cannot exec finalizer callback after f has been gc")
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}
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})
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for i := int32(1); i <= maxCount; i++ {
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runtime.GC()
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require.Equal(t, i, atomic.LoadInt32(&state.count))
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}
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require.Nil(t, f.ref)
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f.stop()
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require.Equal(t, maxCount, atomic.LoadInt32(&state.count))
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runtime.GC()
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require.Equal(t, maxCount, atomic.LoadInt32(&state.count))
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runtime.GC()
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require.Equal(t, maxCount, atomic.LoadInt32(&state.count))
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}
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