github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/engine/pkg/quota/concurrency_quota_test.go (about)

     1  // Copyright 2022 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package quota
    15  
    16  import (
    17  	"context"
    18  	"testing"
    19  	"time"
    20  
    21  	"github.com/stretchr/testify/require"
    22  )
    23  
    24  func TestConcurrencyQuota(t *testing.T) {
    25  	t.Parallel()
    26  
    27  	quota := NewConcurrencyQuota(5)
    28  	require.True(t, quota.TryConsume())
    29  	require.True(t, quota.TryConsume())
    30  	require.True(t, quota.TryConsume())
    31  	require.True(t, quota.TryConsume())
    32  	require.True(t, quota.TryConsume())
    33  	require.False(t, quota.TryConsume())
    34  	quota.Release()
    35  	require.True(t, quota.TryConsume())
    36  	require.False(t, quota.TryConsume())
    37  }
    38  
    39  func TestConcurrencyQuotaBlocking(t *testing.T) {
    40  	t.Parallel()
    41  
    42  	quota := NewConcurrencyQuota(1)
    43  	err := quota.Consume(context.Background())
    44  	require.NoError(t, err)
    45  
    46  	timeoutCtx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
    47  	defer cancel()
    48  	err = quota.Consume(timeoutCtx)
    49  	require.Error(t, err)
    50  	require.Regexp(t, ".*context deadline exceeded.*", err.Error())
    51  }