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operator.go
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operator.go
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package testutil
import (
"testing"
"github.com/deepfabric/prophet/schedule/operator"
"github.com/stretchr/testify/assert"
)
// CheckAddPeer checks if the operator is to add peer on specified container.
func CheckAddPeer(t *testing.T, op *operator.Operator, kind operator.OpKind, containerID uint64) {
assert.NotNil(t, op)
assert.Equal(t, 2, op.Len())
assert.Equal(t, containerID, op.Step(0).(operator.AddLearner).ToContainer)
_, ok := op.Step(1).(operator.PromoteLearner)
assert.True(t, ok)
kind |= operator.OpResource
assert.Equal(t, kind, op.Kind()&kind)
}
// CheckRemovePeer checks if the operator is to remove peer on specified container.
func CheckRemovePeer(t *testing.T, op *operator.Operator, containerID uint64) {
assert.NotNil(t, op)
if op.Len() == 1 {
assert.Equal(t, containerID, op.Step(0).(operator.RemovePeer).FromContainer)
} else {
assert.Equal(t, 2, op.Len())
assert.Equal(t, containerID, op.Step(0).(operator.TransferLeader).FromContainer)
assert.Equal(t, containerID, op.Step(1).(operator.RemovePeer).FromContainer)
}
}
// CheckTransferLeader checks if the operator is to transfer leader between the specified source and target containers.
func CheckTransferLeader(t *testing.T, op *operator.Operator, kind operator.OpKind, sourceID, targetID uint64) {
assert.NotNil(t, op)
assert.Equal(t, 1, op.Len())
assert.Equal(t, operator.TransferLeader{FromContainer: sourceID, ToContainer: targetID}, op.Step(0))
kind |= operator.OpLeader
assert.Equal(t, kind, op.Kind()&kind)
}
// CheckTransferLeaderFrom checks if the operator is to transfer leader out of the specified container.
func CheckTransferLeaderFrom(t *testing.T, op *operator.Operator, kind operator.OpKind, sourceID uint64) {
assert.NotNil(t, op)
assert.Equal(t, 1, op.Len())
assert.Equal(t, sourceID, op.Step(0).(operator.TransferLeader).FromContainer)
kind |= operator.OpLeader
assert.Equal(t, kind, op.Kind()&kind)
}
// CheckTransferPeer checks if the operator is to transfer peer between the specified source and target containers.
func CheckTransferPeer(t *testing.T, op *operator.Operator, kind operator.OpKind, sourceID, targetID uint64) {
assert.NotNil(t, op)
steps, _ := trimTransferLeaders(op)
assert.Equal(t, 3, len(steps))
assert.Equal(t, targetID, steps[0].(operator.AddLearner).ToContainer)
_, ok := steps[1].(operator.PromoteLearner)
assert.True(t, ok)
assert.Equal(t, sourceID, steps[2].(operator.RemovePeer).FromContainer)
kind |= operator.OpResource
assert.Equal(t, kind, op.Kind()&kind)
}
// CheckTransferLearner checks if the operator is to transfer learner between the specified source and target containers.
func CheckTransferLearner(t *testing.T, op *operator.Operator, kind operator.OpKind, sourceID, targetID uint64) {
assert.NotNil(t, op)
steps, _ := trimTransferLeaders(op)
assert.Equal(t, 2, len(steps))
assert.Equal(t, steps[0].(operator.AddLearner).ToContainer, targetID)
assert.Equal(t, steps[1].(operator.RemovePeer).FromContainer, sourceID)
kind |= operator.OpResource
assert.Equal(t, kind, op.Kind()&kind)
}
// CheckTransferPeerWithLeaderTransfer checks if the operator is to transfer
// peer between the specified source and target containers and it meanwhile
// transfers the leader out of source container.
func CheckTransferPeerWithLeaderTransfer(t *testing.T, op *operator.Operator, kind operator.OpKind, sourceID, targetID uint64) {
assert.NotNil(t, op)
steps, lastLeader := trimTransferLeaders(op)
assert.Equal(t, 3, len(steps))
assert.Equal(t, steps[0].(operator.AddLearner).ToContainer, targetID)
_, ok := steps[1].(operator.PromoteLearner)
assert.True(t, ok)
assert.Equal(t, steps[2].(operator.RemovePeer).FromContainer, sourceID)
assert.NotEqual(t, lastLeader, uint64(0))
assert.NotEqual(t, lastLeader, sourceID)
kind |= operator.OpResource
assert.Equal(t, kind, op.Kind()&kind)
}
// CheckTransferPeerWithLeaderTransferFrom checks if the operator is to transfer
// peer out of the specified container and it meanwhile transfers the leader out of
// the container.
func CheckTransferPeerWithLeaderTransferFrom(t *testing.T, op *operator.Operator, kind operator.OpKind, sourceID uint64) {
assert.NotNil(t, op)
steps, lastLeader := trimTransferLeaders(op)
_, ok := steps[0].(operator.AddLearner)
assert.True(t, ok)
_, ok = steps[1].(operator.PromoteLearner)
assert.True(t, ok)
assert.Equal(t, steps[2].(operator.RemovePeer).FromContainer, sourceID)
assert.NotEqual(t, lastLeader, uint64(0))
assert.NotEqual(t, lastLeader, sourceID)
kind |= operator.OpResource | operator.OpLeader
assert.Equal(t, kind, op.Kind()&kind)
}
func trimTransferLeaders(op *operator.Operator) (steps []operator.OpStep, lastLeader uint64) {
for i := 0; i < op.Len(); i++ {
step := op.Step(i)
if s, ok := step.(operator.TransferLeader); ok {
lastLeader = s.ToContainer
} else {
steps = append(steps, step)
}
}
return
}