vitess.io/vitess@v0.16.2/go/vt/topo/test/tablet.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  // checkTablet verifies the topo server API is correct for managing tablets.
    32  func checkTablet(t *testing.T, ts *topo.Server) {
    33  	ctx := context.Background()
    34  
    35  	tablet := &topodatapb.Tablet{
    36  		Alias: &topodatapb.TabletAlias{
    37  			Cell: LocalCellName,
    38  			Uid:  1,
    39  		},
    40  		Hostname:      "localhost",
    41  		MysqlHostname: "localhost",
    42  		PortMap: map[string]int32{
    43  			"vt": 3333,
    44  		},
    45  
    46  		Tags:     map[string]string{"tag": "value"},
    47  		Keyspace: "test_keyspace",
    48  		Type:     topodatapb.TabletType_PRIMARY,
    49  		KeyRange: newKeyRange("-10"),
    50  	}
    51  	tablet.MysqlPort = 3334
    52  	if err := ts.CreateTablet(ctx, tablet); err != nil {
    53  		t.Fatalf("CreateTablet: %v", err)
    54  	}
    55  	if err := ts.CreateTablet(ctx, tablet); !topo.IsErrType(err, topo.NodeExists) {
    56  		t.Fatalf("CreateTablet(again): %v", err)
    57  	}
    58  
    59  	if _, err := ts.GetTablet(ctx, &topodatapb.TabletAlias{
    60  		Cell: LocalCellName,
    61  		Uid:  666,
    62  	}); !topo.IsErrType(err, topo.NoNode) {
    63  		t.Fatalf("GetTablet(666): %v", err)
    64  	}
    65  
    66  	ti, err := ts.GetTablet(ctx, tablet.Alias)
    67  	if err != nil {
    68  		t.Fatalf("GetTablet %v: %v", tablet.Alias, err)
    69  	}
    70  	if !proto.Equal(ti.Tablet, tablet) {
    71  		t.Errorf("put and got tablets are not identical:\n%#v\n%#v", tablet, t)
    72  	}
    73  
    74  	if _, err := ts.GetTabletAliasesByCell(ctx, "666"); !topo.IsErrType(err, topo.NoNode) {
    75  		t.Errorf("GetTabletsByCell(666): %v", err)
    76  	}
    77  
    78  	inCell, err := ts.GetTabletAliasesByCell(ctx, LocalCellName)
    79  	if err != nil {
    80  		t.Fatalf("GetTabletsByCell: %v", err)
    81  	}
    82  	if len(inCell) != 1 || !proto.Equal(inCell[0], tablet.Alias) {
    83  		t.Errorf("GetTabletsByCell: want [%v], got %v", tablet.Alias, inCell)
    84  	}
    85  
    86  	ti.Tablet.Hostname = "remotehost"
    87  	if err := ts.UpdateTablet(ctx, ti); err != nil {
    88  		t.Errorf("UpdateTablet: %v", err)
    89  	}
    90  
    91  	ti, err = ts.GetTablet(ctx, tablet.Alias)
    92  	if err != nil {
    93  		t.Fatalf("GetTablet %v: %v", tablet.Alias, err)
    94  	}
    95  	if want := "remotehost"; ti.Tablet.Hostname != want {
    96  		t.Errorf("nt.Hostname: want %v, got %v", want, ti.Tablet.Hostname)
    97  	}
    98  
    99  	// test UpdateTabletFields works
   100  	updatedTablet, err := ts.UpdateTabletFields(ctx, tablet.Alias, func(t *topodatapb.Tablet) error {
   101  		t.Hostname = "anotherhost"
   102  		return nil
   103  	})
   104  	if err != nil {
   105  		t.Fatalf("UpdateTabletFields: %v", err)
   106  	}
   107  	if got, want := updatedTablet.Hostname, "anotherhost"; got != want {
   108  		t.Errorf("updatedTablet.Hostname = %q, want %q", got, want)
   109  	}
   110  	ti, err = ts.GetTablet(ctx, tablet.Alias)
   111  	if err != nil {
   112  		t.Fatalf("GetTablet %v: %v", tablet.Alias, err)
   113  	}
   114  	if got, want := ti.Tablet.Hostname, "anotherhost"; got != want {
   115  		t.Errorf("nt.Hostname = %q, want %q", got, want)
   116  	}
   117  
   118  	// test UpdateTabletFields that returns ErrNoUpdateNeeded works
   119  	if _, err := ts.UpdateTabletFields(ctx, tablet.Alias, func(t *topodatapb.Tablet) error {
   120  		return topo.NewError(topo.NoUpdateNeeded, tablet.Alias.String())
   121  	}); err != nil {
   122  		t.Errorf("UpdateTabletFields: %v", err)
   123  	}
   124  	if nti, nerr := ts.GetTablet(ctx, tablet.Alias); nti.Version() != ti.Version() {
   125  		t.Fatalf("GetTablet %v: %v %v", tablet.Alias, nti, nerr)
   126  	}
   127  
   128  	if want := "anotherhost"; ti.Tablet.Hostname != want {
   129  		t.Errorf("nt.Hostname: want %v, got %v", want, ti.Tablet.Hostname)
   130  	}
   131  
   132  	if err := ts.DeleteTablet(ctx, tablet.Alias); err != nil {
   133  		t.Errorf("DeleteTablet: %v", err)
   134  	}
   135  	if err := ts.DeleteTablet(ctx, tablet.Alias); !topo.IsErrType(err, topo.NoNode) {
   136  		t.Errorf("DeleteTablet(again): %v", err)
   137  	}
   138  
   139  	if _, err := ts.GetTablet(ctx, tablet.Alias); !topo.IsErrType(err, topo.NoNode) {
   140  		t.Errorf("GetTablet: expected error, tablet was deleted: %v", err)
   141  	}
   142  
   143  }