github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/engine/pkg/dm/ticker/ticker_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 ticker
    15  
    16  import (
    17  	"context"
    18  	"sync"
    19  	"testing"
    20  	"time"
    21  
    22  	"github.com/pingcap/tiflow/pkg/errors"
    23  	"github.com/stretchr/testify/require"
    24  )
    25  
    26  func TestDefaultTicker(t *testing.T) {
    27  	t.Parallel()
    28  
    29  	ctx, cancel := context.WithCancel(context.Background())
    30  	defer cancel()
    31  	dummyTicker := NewDummyTicker()
    32  	var wg sync.WaitGroup
    33  
    34  	tickError := errors.New("tick error")
    35  	dummyTicker.SetResult([]error{tickError, tickError, nil})
    36  
    37  	wg.Add(1)
    38  	// run task manager
    39  	go func() {
    40  		defer wg.Done()
    41  		t := time.NewTicker(50 * time.Millisecond)
    42  		for {
    43  			select {
    44  			case <-ctx.Done():
    45  				return
    46  			case <-t.C:
    47  				dummyTicker.DoTick(ctx)
    48  			}
    49  		}
    50  	}()
    51  
    52  	// first tick when start
    53  	require.Eventually(t, dummyTicker.ResultAllMeet, 5*time.Second, 100*time.Millisecond)
    54  
    55  	// mock manual trigger a tick
    56  	dummyTicker.SetResult([]error{tickError, tickError, nil})
    57  	dummyTicker.SetNextCheckTime(time.Now())
    58  	require.Eventually(t, dummyTicker.ResultAllMeet, 5*time.Second, 100*time.Millisecond)
    59  
    60  	// mock trigger with delay
    61  	dummyTicker.SetResult([]error{nil})
    62  	dummyTicker.SetNextCheckTime(time.Now().Add(time.Second))
    63  	require.Eventually(t, dummyTicker.ResultAllMeet, 5*time.Second, 100*time.Millisecond)
    64  
    65  	cancel()
    66  	wg.Wait()
    67  }
    68  
    69  type DummyTicker struct {
    70  	*DefaultTicker
    71  
    72  	sync.Mutex
    73  	results []error
    74  }
    75  
    76  func NewDummyTicker() *DummyTicker {
    77  	dummyTicker := &DummyTicker{
    78  		DefaultTicker: NewDefaultTicker(time.Hour, 100*time.Millisecond),
    79  	}
    80  	dummyTicker.DefaultTicker.Ticker = dummyTicker
    81  	return dummyTicker
    82  }
    83  
    84  func (t *DummyTicker) SetResult(results []error) {
    85  	t.Lock()
    86  	defer t.Unlock()
    87  	t.results = append(t.results, results...)
    88  }
    89  
    90  func (t *DummyTicker) TickImpl(ctx context.Context) error {
    91  	t.Lock()
    92  	defer t.Unlock()
    93  	if len(t.results) == 0 {
    94  		panic("no result in dummy scheduler")
    95  	}
    96  	result := t.results[0]
    97  	t.results = t.results[1:]
    98  	return result
    99  }
   100  
   101  func (t *DummyTicker) ResultAllMeet() bool {
   102  	t.Lock()
   103  	defer t.Unlock()
   104  	return len(t.results) == 0
   105  }