github.com/m3db/m3@v1.5.0/src/cluster/services/leader/services_test.go (about)

     1  // Copyright (c) 2017 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 leader
    22  
    23  import (
    24  	"testing"
    25  	"time"
    26  
    27  	"github.com/stretchr/testify/assert"
    28  	"github.com/stretchr/testify/require"
    29  	"go.etcd.io/etcd/client/v3/concurrency"
    30  
    31  	"github.com/m3db/m3/src/cluster/services"
    32  )
    33  
    34  // nolint: unparam
    35  func overrideOpts(t *testing.T, s string) services.CampaignOptions {
    36  	opts, err := services.NewCampaignOptions()
    37  	require.NoError(t, err)
    38  	return opts.SetLeaderValue(s)
    39  }
    40  
    41  func TestNewService(t *testing.T) {
    42  	tc := newTestCluster(t)
    43  	defer tc.close()
    44  
    45  	svc, err := NewService(tc.etcdClient(), tc.options())
    46  	assert.NoError(t, err)
    47  	assert.NotNil(t, svc)
    48  }
    49  
    50  func TestService_Campaign(t *testing.T) {
    51  	tc := newTestCluster(t)
    52  	defer tc.close()
    53  
    54  	svc := tc.service()
    55  
    56  	sc, err := svc.Campaign("", overrideOpts(t, "foo1"))
    57  	assert.NoError(t, err)
    58  	assert.NoError(t, waitForStates(sc, true, followerS, leaderS))
    59  
    60  	sc2, err := svc.Campaign("1", overrideOpts(t, "foo1"))
    61  	assert.NoError(t, err)
    62  	assert.NoError(t, waitForStates(sc2, true, followerS, leaderS))
    63  
    64  	for _, eid := range []string{"", "1"} {
    65  		ld, err := svc.Leader(eid)
    66  		assert.NoError(t, err)
    67  		assert.Equal(t, "foo1", ld)
    68  	}
    69  }
    70  
    71  func TestService_Resign(t *testing.T) {
    72  	tc := newTestCluster(t)
    73  	defer tc.close()
    74  
    75  	svc := tc.service()
    76  	sc, err := svc.Campaign("e", overrideOpts(t, "foo1"))
    77  	assert.NoError(t, err)
    78  	assert.NoError(t, waitForStates(sc, true, followerS, leaderS))
    79  
    80  	err = svc.Resign("zzz")
    81  	assert.Error(t, err)
    82  
    83  	err = svc.Resign("e")
    84  	assert.NoError(t, err)
    85  	assert.NoError(t, waitForStates(sc, false, followerS))
    86  }
    87  
    88  func TestService_Leader(t *testing.T) {
    89  	tc := newTestCluster(t)
    90  	defer tc.close()
    91  
    92  	svc := tc.service()
    93  
    94  	sc, err := svc.Campaign("", overrideOpts(t, "foo1"))
    95  	assert.NoError(t, err)
    96  	assert.NoError(t, waitForStates(sc, true, followerS, leaderS))
    97  
    98  	_, err = svc.Leader("z")
    99  	assert.Equal(t, concurrency.ErrElectionNoLeader, err)
   100  
   101  	ld, err := svc.Leader("")
   102  	assert.NoError(t, err)
   103  	assert.Equal(t, "foo1", ld)
   104  }
   105  
   106  func TestService_Observe(t *testing.T) {
   107  	tc := newTestCluster(t)
   108  	defer tc.close()
   109  
   110  	svc := tc.service()
   111  
   112  	oc1, err := svc.Observe("e1")
   113  	assert.NoError(t, err)
   114  
   115  	sc1, err := svc.Campaign("e1", overrideOpts(t, "l1"))
   116  	assert.NoError(t, err)
   117  	assert.NoError(t, waitForStates(sc1, true, followerS, leaderS))
   118  
   119  	select {
   120  	case <-time.After(time.Second):
   121  		t.Error("expected to receive client update")
   122  	case v := <-oc1:
   123  		assert.Equal(t, "l1", v)
   124  	}
   125  
   126  	oc2, err := svc.Observe("e2")
   127  	assert.NoError(t, err)
   128  
   129  	sc2, err := svc.Campaign("e2", overrideOpts(t, "l1"))
   130  	assert.NoError(t, err)
   131  	assert.NoError(t, waitForStates(sc2, true, followerS, leaderS))
   132  
   133  	select {
   134  	case <-time.After(time.Second):
   135  		t.Error("expected to receive client update")
   136  	case v := <-oc2:
   137  		assert.Equal(t, "l1", v)
   138  	}
   139  }
   140  
   141  func TestService_Close(t *testing.T) {
   142  	tc := newTestCluster(t)
   143  	defer tc.close()
   144  
   145  	opts, err := services.NewCampaignOptions()
   146  	require.NoError(t, err)
   147  
   148  	svc := tc.service()
   149  
   150  	sc1, err := svc.Campaign("1", overrideOpts(t, "foo1"))
   151  	assert.NoError(t, err)
   152  	assert.NoError(t, waitForStates(sc1, true, followerS, leaderS))
   153  
   154  	sc2, err := svc.Campaign("2", opts)
   155  	assert.NoError(t, err)
   156  	assert.NoError(t, waitForStates(sc2, true, followerS, leaderS))
   157  
   158  	assert.NoError(t, svc.Close())
   159  
   160  	waitForStates(sc1, false, followerS)
   161  	waitForStates(sc2, false, followerS)
   162  
   163  	assert.NoError(t, svc.Close())
   164  	assert.Error(t, svc.Resign(""))
   165  
   166  	_, err = svc.Campaign("", opts)
   167  	assert.Error(t, err)
   168  
   169  	_, err = svc.Leader("")
   170  	assert.Error(t, err)
   171  }