mirror of
https://github.com/etcd-io/etcd.git
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62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
// Copyright 2023 The etcd Authors
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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 traffic
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import (
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"sync/atomic"
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"testing"
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"github.com/stretchr/testify/assert"
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"golang.org/x/sync/errgroup"
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)
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func TestLimiter(t *testing.T) {
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limiter := NewConcurrencyLimiter(3)
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counter := &atomic.Int64{}
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g := errgroup.Group{}
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for i := 0; i < 10; i++ {
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g.Go(func() error {
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if limiter.Take() {
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counter.Add(1)
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}
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return nil
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})
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}
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g.Wait()
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assert.Equal(t, 3, int(counter.Load()))
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assert.False(t, limiter.Take())
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limiter.Return()
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counter.Store(0)
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for i := 0; i < 10; i++ {
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g.Go(func() error {
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if limiter.Take() {
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counter.Add(1)
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}
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return nil
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})
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}
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g.Wait()
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assert.Equal(t, 1, int(counter.Load()))
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assert.False(t, limiter.Take())
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limiter.Return()
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limiter.Return()
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limiter.Return()
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assert.Panics(t, func() {
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limiter.Return()
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})
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}
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