github.com/matrixorigin/matrixone@v1.2.0/pkg/util/metric/testutil_test.go (about)

     1  // Copyright 2022 Matrix Origin
     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  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // this file contains test utils. Name this file "*_test.go" to make
    16  // compiler ignore it
    17  
    18  package metric
    19  
    20  import (
    21  	"context"
    22  	"sync"
    23  	"time"
    24  
    25  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    26  )
    27  
    28  // some tests will modify global variables, and something weird
    29  // may happen if they run concurrently.
    30  // use this mutex to make those tests execute sequentially
    31  var configMu *sync.Mutex = new(sync.Mutex)
    32  
    33  func withModifiedConfig(f func()) {
    34  	configMu.Lock()
    35  	defer configMu.Unlock()
    36  	f()
    37  }
    38  
    39  // waitWgTimeout returns an error if the WaitGroup doesn't return in timeout duration
    40  func waitWgTimeout(wg *sync.WaitGroup, after time.Duration) error {
    41  	c := make(chan struct{})
    42  	go func() {
    43  		defer close(c)
    44  		wg.Wait()
    45  	}()
    46  	select {
    47  	case <-time.After(time.Second):
    48  		return moerr.NewInternalError(context.Background(), "timeout")
    49  	case <-c:
    50  		return nil
    51  	}
    52  }
    53  
    54  type dummySwitch struct{}
    55  
    56  func (dummySwitch) Start(ctx context.Context) bool             { return true }
    57  func (dummySwitch) Stop(graceful bool) (<-chan struct{}, bool) { return nil, false }