github.com/livekit/protocol@v1.16.1-0.20240517185851-47e4c6bba773/utils/multitonservice_test.go (about)

     1  // Copyright 2023 LiveKit, 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  // 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  package utils
    16  
    17  import (
    18  	"testing"
    19  	"time"
    20  
    21  	"github.com/stretchr/testify/require"
    22  	"go.uber.org/atomic"
    23  )
    24  
    25  type testService struct {
    26  	key       string
    27  	killCalls atomic.Int32
    28  }
    29  
    30  func newTestService(key string) *testService {
    31  	return &testService{key: key}
    32  }
    33  
    34  func (s *testService) Kill() { s.killCalls.Inc() }
    35  
    36  func TestMultitonService(t *testing.T) {
    37  	t.Run("start and stop are called", func(t *testing.T) {
    38  		t.Parallel()
    39  
    40  		r := MultitonService[string]{}
    41  		svc := newTestService("foo")
    42  		stop := r.Replace("test", svc)
    43  
    44  		time.Sleep(time.Millisecond)
    45  
    46  		stop()
    47  
    48  		time.Sleep(time.Millisecond)
    49  
    50  		require.EqualValues(t, 1, svc.killCalls.Load())
    51  	})
    52  
    53  	t.Run("stop is idempotent", func(t *testing.T) {
    54  		t.Parallel()
    55  
    56  		r := MultitonService[string]{}
    57  		svc := newTestService("foo")
    58  		stop := r.Replace("test", svc)
    59  
    60  		for i := 0; i < 3; i++ {
    61  			time.Sleep(time.Millisecond)
    62  
    63  			stop()
    64  		}
    65  
    66  		require.EqualValues(t, 1, svc.killCalls.Load())
    67  	})
    68  
    69  	t.Run("replaced services are stopped", func(t *testing.T) {
    70  		t.Parallel()
    71  
    72  		r := MultitonService[string]{}
    73  		svc0 := newTestService("foo")
    74  		r.Replace("test", svc0)
    75  
    76  		time.Sleep(time.Millisecond)
    77  
    78  		svc1 := newTestService("foo")
    79  		r.Replace("test", svc1)
    80  
    81  		time.Sleep(time.Millisecond)
    82  
    83  		require.EqualValues(t, 1, svc0.killCalls.Load())
    84  		require.EqualValues(t, 0, svc1.killCalls.Load())
    85  	})
    86  
    87  	t.Run("stop funcs for replaced services are neutered", func(t *testing.T) {
    88  		t.Parallel()
    89  
    90  		r := MultitonService[string]{}
    91  		svc0 := newTestService("foo")
    92  		stop0 := r.Replace("test", svc0)
    93  
    94  		time.Sleep(time.Millisecond)
    95  
    96  		svc1 := newTestService("foo")
    97  		r.Replace("test", svc1)
    98  
    99  		time.Sleep(time.Millisecond)
   100  
   101  		stop0()
   102  
   103  		time.Sleep(time.Millisecond)
   104  
   105  		require.EqualValues(t, 1, svc0.killCalls.Load())
   106  		require.EqualValues(t, 0, svc1.killCalls.Load())
   107  	})
   108  }