github.com/m3db/m3@v1.5.0/src/query/storage/m3/cluster_namespaces_watcher_test.go (about)

     1  // Copyright (c) 2020  Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package m3
    22  
    23  import (
    24  	"testing"
    25  	"time"
    26  
    27  	"github.com/m3db/m3/src/dbnode/client"
    28  	"github.com/m3db/m3/src/x/ident"
    29  	xtest "github.com/m3db/m3/src/x/test"
    30  	xwatch "github.com/m3db/m3/src/x/watch"
    31  
    32  	"github.com/golang/mock/gomock"
    33  	"github.com/stretchr/testify/require"
    34  )
    35  
    36  func TestClusterNamespacesWatcherGet(t *testing.T) {
    37  	ctrl := xtest.NewController(t)
    38  	defer ctrl.Finish()
    39  
    40  	watchable := xwatch.NewWatchable()
    41  	var watcher ClusterNamespacesWatcher = &clusterNamespacesWatcher{watchable: watchable}
    42  	defer watcher.Close()
    43  
    44  	// Get from empty watch.
    45  	namespaces := watcher.Get()
    46  	require.Nil(t, namespaces)
    47  
    48  	// Get when watch is set.
    49  	namespaces = createClusterNamespaces(t, ctrl)
    50  	err := watchable.Update(namespaces)
    51  	require.NoError(t, err)
    52  
    53  	require.Equal(t, namespaces, watcher.Get())
    54  }
    55  
    56  func TestClusterNamespacesWatcherUpdater(t *testing.T) {
    57  	ctrl := xtest.NewController(t)
    58  	defer ctrl.Finish()
    59  
    60  	watcher := NewClusterNamespacesWatcher()
    61  	defer watcher.Close()
    62  
    63  	require.Nil(t, watcher.Get())
    64  
    65  	namespaces := createClusterNamespaces(t, ctrl)
    66  	err := watcher.Update(namespaces)
    67  	require.NoError(t, err)
    68  
    69  	require.Equal(t, namespaces, watcher.Get())
    70  }
    71  
    72  func TestClusterNamespacesWatcherRegisterListener(t *testing.T) {
    73  	ctrl := xtest.NewController(t)
    74  	defer ctrl.Finish()
    75  
    76  	watcher := NewClusterNamespacesWatcher()
    77  	defer watcher.Close()
    78  
    79  	namespaces := createClusterNamespaces(t, ctrl)
    80  
    81  	updateCh := make(chan bool)
    82  	listener := &testListener{
    83  		expected: namespaces,
    84  		updateCh: updateCh,
    85  		t:        t,
    86  	}
    87  	watcher.RegisterListener(listener)
    88  
    89  	err := watcher.Update(namespaces)
    90  	require.NoError(t, err)
    91  
    92  	<-updateCh
    93  }
    94  
    95  func TestClusterNamespacesWatcherRegisterListenerNamespacesAlreadySet(t *testing.T) {
    96  	ctrl := xtest.NewController(t)
    97  	defer ctrl.Finish()
    98  
    99  	watcher := NewClusterNamespacesWatcher()
   100  	defer watcher.Close()
   101  
   102  	namespaces := createClusterNamespaces(t, ctrl)
   103  
   104  	err := watcher.Update(namespaces)
   105  	require.NoError(t, err)
   106  
   107  	updateCh := make(chan bool, 1)
   108  	listener := &testListener{
   109  		expected: namespaces,
   110  		updateCh: updateCh,
   111  		t:        t,
   112  	}
   113  	watcher.RegisterListener(listener)
   114  
   115  	<-updateCh
   116  
   117  	// Add a short sleep to ensure we don't receive a duplicate (and undesired) call
   118  	time.Sleep(250 * time.Millisecond)
   119  
   120  	require.Equal(t, 1, listener.callCount)
   121  }
   122  
   123  func createClusterNamespaces(t *testing.T, ctrl *gomock.Controller) ClusterNamespaces {
   124  	session := client.NewMockSession(ctrl)
   125  	namespace, err := newAggregatedClusterNamespace(AggregatedClusterNamespaceDefinition{
   126  		NamespaceID: ident.StringID("2s:1d"),
   127  		Resolution:  2 * time.Second,
   128  		Retention:   24 * time.Hour,
   129  		Session:     session,
   130  	})
   131  	require.NoError(t, err)
   132  
   133  	return ClusterNamespaces{namespace}
   134  }
   135  
   136  type testListener struct {
   137  	updateCh  chan bool
   138  	expected  ClusterNamespaces
   139  	t         *testing.T
   140  	callCount int
   141  }
   142  
   143  func (l *testListener) OnUpdate(namespaces ClusterNamespaces) {
   144  	require.Equal(l.t, l.expected, namespaces)
   145  	l.updateCh <- true
   146  	l.callCount++
   147  }