vitess.io/vitess@v0.16.2/go/vt/topo/test/replication.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package test
    18  
    19  import (
    20  	"testing"
    21  
    22  	"google.golang.org/protobuf/proto"
    23  
    24  	"context"
    25  
    26  	"vitess.io/vitess/go/vt/topo"
    27  
    28  	topodatapb "vitess.io/vitess/go/vt/proto/topodata"
    29  )
    30  
    31  // checkShardReplication tests ShardReplication objects
    32  func checkShardReplication(t *testing.T, ts *topo.Server) {
    33  	ctx := context.Background()
    34  	if _, err := ts.GetShardReplication(ctx, LocalCellName, "test_keyspace", "-10"); !topo.IsErrType(err, topo.NoNode) {
    35  		t.Errorf("GetShardReplication(not there): %v", err)
    36  	}
    37  
    38  	sr := &topodatapb.ShardReplication{
    39  		Nodes: []*topodatapb.ShardReplication_Node{
    40  			{
    41  				TabletAlias: &topodatapb.TabletAlias{
    42  					Cell: "c1",
    43  					Uid:  1,
    44  				},
    45  			},
    46  		},
    47  	}
    48  	if err := ts.UpdateShardReplicationFields(ctx, LocalCellName, "test_keyspace", "-10", func(oldSr *topodatapb.ShardReplication) error {
    49  		return topo.NewError(topo.NoUpdateNeeded, LocalCellName)
    50  	}); err != nil {
    51  		t.Fatalf("UpdateShardReplicationFields() failed: %v", err)
    52  	}
    53  	if err := ts.UpdateShardReplicationFields(ctx, LocalCellName, "test_keyspace", "-10", func(oldSr *topodatapb.ShardReplication) error {
    54  		proto.Reset(oldSr)
    55  		proto.Merge(oldSr, sr)
    56  		return nil
    57  	}); err != nil {
    58  		t.Fatalf("UpdateShardReplicationFields() failed: %v", err)
    59  	}
    60  
    61  	if sri, err := ts.GetShardReplication(ctx, LocalCellName, "test_keyspace", "-10"); err != nil {
    62  		t.Errorf("GetShardReplication(new guy) failed: %v", err)
    63  	} else {
    64  		if len(sri.Nodes) != 1 ||
    65  			sri.Nodes[0].TabletAlias.Cell != "c1" ||
    66  			sri.Nodes[0].TabletAlias.Uid != 1 {
    67  			t.Errorf("GetShardReplication(new guy) returned wrong value: %v", *sri)
    68  		}
    69  	}
    70  
    71  	if err := ts.UpdateShardReplicationFields(ctx, LocalCellName, "test_keyspace", "-10", func(sr *topodatapb.ShardReplication) error {
    72  		sr.Nodes = append(sr.Nodes, &topodatapb.ShardReplication_Node{
    73  			TabletAlias: &topodatapb.TabletAlias{
    74  				Cell: "c3",
    75  				Uid:  3,
    76  			},
    77  		})
    78  		return nil
    79  	}); err != nil {
    80  		t.Errorf("UpdateShardReplicationFields() failed: %v", err)
    81  	}
    82  
    83  	if sri, err := ts.GetShardReplication(ctx, LocalCellName, "test_keyspace", "-10"); err != nil {
    84  		t.Errorf("GetShardReplication(after append) failed: %v", err)
    85  	} else {
    86  		if len(sri.Nodes) != 2 ||
    87  			sri.Nodes[0].TabletAlias.Cell != "c1" ||
    88  			sri.Nodes[0].TabletAlias.Uid != 1 ||
    89  			sri.Nodes[1].TabletAlias.Cell != "c3" ||
    90  			sri.Nodes[1].TabletAlias.Uid != 3 {
    91  			t.Errorf("GetShardReplication(new guy) returned wrong value: %v", *sri)
    92  		}
    93  	}
    94  
    95  	if err := ts.DeleteShardReplication(ctx, LocalCellName, "test_keyspace", "-10"); err != nil {
    96  		t.Errorf("DeleteShardReplication(existing) failed: %v", err)
    97  	}
    98  	if err := ts.DeleteShardReplication(ctx, LocalCellName, "test_keyspace", "-10"); !topo.IsErrType(err, topo.NoNode) {
    99  		t.Errorf("DeleteShardReplication(again) returned: %v", err)
   100  	}
   101  
   102  	// Some implementations may already remove the directory if not data is in there, so we ignore topo.ErrNoNode.
   103  	if err := ts.DeleteKeyspaceReplication(ctx, LocalCellName, "test_keyspace"); err != nil && !topo.IsErrType(err, topo.NoNode) {
   104  		t.Errorf("DeleteKeyspaceReplication(existing) failed: %v", err)
   105  	}
   106  	// The second time though, it should be gone.
   107  	if err := ts.DeleteKeyspaceReplication(ctx, LocalCellName, "test_keyspace"); !topo.IsErrType(err, topo.NoNode) {
   108  		t.Errorf("DeleteKeyspaceReplication(again) returned: %v", err)
   109  	}
   110  }