open-nomad/helper/raftutil/state_test.go

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package raftutil
import (
"path/filepath"
"testing"
raftboltdb "github.com/hashicorp/raft-boltdb"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
// TestRaftStateInfo_InUse asserts that commands that inspect raft
// state such as "nomad operator raft info" and "nomad operator raft
// logs" fail with a helpful error message when called on an inuse
// database.
func TestRaftStateInfo_InUse(t *testing.T) {
t.Parallel() // since there's a 1s timeout.
// First create an empty raft db
dir := filepath.Join(t.TempDir(), "raft.db")
fakedb, err := raftboltdb.NewBoltStore(dir)
require.NoError(t, err)
// Next try to read the db without closing it
s, _, _, err := RaftStateInfo(dir)
assert.Nil(t, s)
require.EqualError(t, err, errAlreadyOpen.Error())
// LogEntries should produce the same error
_, _, err = LogEntries(dir)
require.EqualError(t, err, "failed to open raft logs: "+errAlreadyOpen.Error())
// Commands should work once the db is closed
require.NoError(t, fakedb.Close())
s, _, _, err = RaftStateInfo(dir)
assert.NotNil(t, s)
require.NoError(t, err)
require.NoError(t, s.Close())
logCh, errCh, err := LogEntries(dir)
require.NoError(t, err)
// Consume entries to cleanly close db
for closed := false; closed; {
select {
case _, closed = <-logCh:
case <-errCh:
}
}
}