github.com/m3db/m3@v1.5.0/src/cluster/placement/storage/watch_test.go (about)

     1  // Copyright (c) 2018 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 storage
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/m3db/m3/src/cluster/generated/proto/kvtest"
    27  	"github.com/m3db/m3/src/cluster/kv/mem"
    28  	"github.com/m3db/m3/src/cluster/placement"
    29  
    30  	"github.com/stretchr/testify/assert"
    31  	"github.com/stretchr/testify/require"
    32  )
    33  
    34  func TestPlacementWatch(t *testing.T) {
    35  	m := mem.NewStore()
    36  	ps := newTestPlacementStorage(m, placement.NewOptions()).(*storage)
    37  	w, err := ps.Watch()
    38  	require.NoError(t, err)
    39  	require.Equal(t, 0, len(w.C()))
    40  
    41  	p := placement.NewPlacement().
    42  		SetInstances([]placement.Instance{}).
    43  		SetShards([]uint32{}).
    44  		SetReplicaFactor(0)
    45  	pGet, err := ps.Set(p)
    46  	require.NoError(t, err)
    47  	assert.Equal(t, 1, pGet.Version())
    48  	<-w.C()
    49  	p, err = w.Get()
    50  	require.NoError(t, err)
    51  	require.Equal(t, p.SetVersion(1), p)
    52  
    53  	pGet, err = ps.Set(p)
    54  	require.NoError(t, err)
    55  	assert.Equal(t, 2, pGet.Version())
    56  	<-w.C()
    57  	p, err = w.Get()
    58  	require.NoError(t, err)
    59  	require.Equal(t, p.SetVersion(2), p)
    60  
    61  	err = ps.Delete()
    62  	require.NoError(t, err)
    63  	<-w.C()
    64  	_, err = w.Get()
    65  	require.Error(t, err)
    66  
    67  	pGet, err = ps.SetIfNotExist(p)
    68  	assert.Equal(t, 1, pGet.Version())
    69  	require.NoError(t, err)
    70  	<-w.C()
    71  	p, err = w.Get()
    72  	require.NoError(t, err)
    73  	require.Equal(t, p.SetVersion(1), p)
    74  
    75  	m.Set(ps.key, &kvtest.Foo{Msg: "foo"})
    76  	require.NoError(t, err)
    77  	<-w.C()
    78  	_, err = w.Get()
    79  	require.Error(t, err)
    80  }