github.com/m3db/m3@v1.5.0/src/dbnode/sharding/shardset_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 sharding
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/m3db/m3/src/cluster/shard"
    27  	"github.com/m3db/m3/src/x/ident"
    28  	"github.com/stretchr/testify/require"
    29  )
    30  
    31  func TestShardSet(t *testing.T) {
    32  	ss, err := NewShardSet(
    33  		NewShards([]uint32{1, 1}, shard.Available),
    34  		func(id ident.ID) uint32 {
    35  			return 0
    36  		})
    37  	require.Equal(t, ErrDuplicateShards, err)
    38  	require.Nil(t, ss)
    39  
    40  	staticShard := uint32(1)
    41  	ss, err = NewShardSet(
    42  		NewShards([]uint32{1, 5, 3}, shard.Available),
    43  		func(id ident.ID) uint32 {
    44  			return staticShard
    45  		})
    46  	require.NoError(t, err)
    47  	require.NotNil(t, ss)
    48  	require.Equal(t, []uint32{1, 5, 3}, ss.AllIDs())
    49  	require.Equal(t, uint32(1), ss.Min())
    50  	require.Equal(t, uint32(5), ss.Max())
    51  
    52  	id := ident.StringID("bla")
    53  	s := ss.Lookup(id)
    54  	require.Equal(t, staticShard, s)
    55  	fn := ss.HashFn()
    56  	require.Equal(t, staticShard, fn(id))
    57  }
    58  
    59  func TestLookupShardState(t *testing.T) {
    60  	staticShard := uint32(1)
    61  	ss, err := NewShardSet(
    62  		NewShards([]uint32{1, 5, 3}, shard.Available),
    63  		func(id ident.ID) uint32 {
    64  			return staticShard
    65  		})
    66  	require.NoError(t, err)
    67  
    68  	shardOneState, err := ss.LookupStateByID(1)
    69  	require.NoError(t, err)
    70  	require.Equal(t, shard.Available, shardOneState)
    71  
    72  	var noState shard.State
    73  	shardTwoState, err := ss.LookupStateByID(2)
    74  	require.Equal(t, ErrInvalidShardID, err)
    75  	require.Equal(t, noState, shardTwoState)
    76  }