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

     1  // Copyright (c) 2016 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 cluster
    22  
    23  import (
    24  	"fmt"
    25  	"testing"
    26  
    27  	"github.com/m3db/m3/src/dbnode/sharding"
    28  	"github.com/m3db/m3/src/dbnode/storage"
    29  	"github.com/m3db/m3/src/dbnode/topology"
    30  	"github.com/m3db/m3/src/dbnode/topology/testutil"
    31  	xwatch "github.com/m3db/m3/src/x/watch"
    32  
    33  	"github.com/golang/mock/gomock"
    34  	"github.com/stretchr/testify/require"
    35  )
    36  
    37  type restoreFn func()
    38  
    39  func mockNewStorageDatabase(
    40  	ctrl *gomock.Controller,
    41  ) (*storage.MockDatabase, restoreFn) {
    42  	var mock *storage.MockDatabase
    43  	if ctrl != nil {
    44  		mock = storage.NewMockDatabase(ctrl)
    45  	}
    46  	restore := setNewStorageDatabase(func(
    47  		shardSet sharding.ShardSet,
    48  		opts storage.Options,
    49  	) (storage.Database, error) {
    50  		if mock == nil {
    51  			return nil, fmt.Errorf("no injected storage database")
    52  		}
    53  		return mock, nil
    54  	})
    55  	return mock, restore
    56  }
    57  
    58  func setNewStorageDatabase(fn newStorageDatabaseFn) restoreFn {
    59  	prevNewStorageDatabase := newStorageDatabase
    60  	newStorageDatabase = fn
    61  	return func() {
    62  		newStorageDatabase = prevNewStorageDatabase
    63  	}
    64  }
    65  
    66  type mockTopoInitProperties struct {
    67  	topology         *topology.MockDynamicTopology
    68  	propogateViewsCh chan struct{}
    69  }
    70  
    71  func newMockTopoInit(
    72  	t *testing.T,
    73  	ctrl *gomock.Controller,
    74  	viewsCh <-chan testutil.TopologyView,
    75  ) (
    76  	*topology.MockInitializer,
    77  	mockTopoInitProperties,
    78  ) {
    79  	init := topology.NewMockInitializer(ctrl)
    80  
    81  	watch := xwatch.NewWatchable()
    82  
    83  	// Make the propagate views channel large so it never blocks
    84  	propogateViewsCh := make(chan struct{}, 128)
    85  
    86  	go func() {
    87  		for {
    88  			v, ok := <-viewsCh
    89  			if !ok {
    90  				break
    91  			}
    92  
    93  			m, err := v.Map()
    94  			require.NoError(t, err)
    95  			watch.Update(m)
    96  
    97  			propogateViewsCh <- struct{}{}
    98  		}
    99  	}()
   100  
   101  	_, w, err := watch.Watch()
   102  	require.NoError(t, err)
   103  
   104  	topo := topology.NewMockDynamicTopology(ctrl)
   105  	topo.EXPECT().Watch().Return(topology.NewMapWatch(w), nil)
   106  
   107  	init.EXPECT().Init().Return(topo, nil)
   108  
   109  	return init, mockTopoInitProperties{
   110  		topology:         topo,
   111  		propogateViewsCh: propogateViewsCh,
   112  	}
   113  }