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package v2
import (
"testing"
"github.com/stretchr/testify/assert"
"github.com/tendermint/tendermint/p2p"
tmState "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/types"
)
// pcBlock is a test helper structure with simple types. Its purpose is to help with test readability.
type pcBlock struct {
pid string
height int64
}
// params is a test structure used to create processor state.
type params struct {
height int64
items []pcBlock
blocksSynced int
verBL []int64
appBL []int64
draining bool
}
// makePcBlock makes an empty block.
func makePcBlock(height int64) *types.Block {
return &types.Block{Header: types.Header{Height: height}}
}
// makeState takes test parameters and creates a specific processor state.
func makeState(p *params) *pcState {
var (
tmState = tmState.State{LastBlockHeight: p.height}
context = newMockProcessorContext(tmState, p.verBL, p.appBL)
)
state := newPcState(context)
for _, item := range p.items {
state.enqueue(p2p.ID(item.pid), makePcBlock(item.height), item.height)
}
state.blocksSynced = p.blocksSynced
state.draining = p.draining
return state
}
func mBlockResponse(peerID p2p.ID, height int64) scBlockReceived {
return scBlockReceived{
peerID: peerID,
block: makePcBlock(height),
}
}
type pcFsmMakeStateValues struct {
currentState *params
event Event
wantState *params
wantNextEvent Event
wantErr error
wantPanic bool
}
type testFields struct {
name string
steps []pcFsmMakeStateValues
}
func executeProcessorTests(t *testing.T, tests []testFields) {
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
var state *pcState
for _, step := range tt.steps {
defer func() {
r := recover()
if (r != nil) != step.wantPanic {
t.Errorf("recover = %v, wantPanic = %v", r, step.wantPanic)
}
}()
// First step must always initialise the currentState as state.
if step.currentState != nil {
state = makeState(step.currentState)
}
if state == nil {
panic("Bad (initial?) step")
}
nextEvent, err := state.handle(step.event)
t.Log(state)
assert.Equal(t, step.wantErr, err)
assert.Equal(t, makeState(step.wantState), state)
assert.Equal(t, step.wantNextEvent, nextEvent)
// Next step may use the wantedState as their currentState.
state = makeState(step.wantState)
}
})
}
}
func TestRProcessPeerError(t *testing.T) {
tests := []testFields{
{
name: "error for existing peer",
steps: []pcFsmMakeStateValues{
{
currentState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}}},
event: scPeerError{peerID: "P2"},
wantState: &params{items: []pcBlock{{"P1", 1}}},
wantNextEvent: noOp,
},
},
},
{
name: "error for unknown peer",
steps: []pcFsmMakeStateValues{
{
currentState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}}},
event: scPeerError{peerID: "P3"},
wantState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}}},
wantNextEvent: noOp,
},
},
},
}
executeProcessorTests(t, tests)
}
func TestPcBlockResponse(t *testing.T) {
tests := []testFields{
{
name: "add one block",
steps: []pcFsmMakeStateValues{
{
currentState: &params{}, event: mBlockResponse("P1", 1),
wantState: &params{items: []pcBlock{{"P1", 1}}}, wantNextEvent: noOp,
},
},
},
{
name: "add two blocks",
steps: []pcFsmMakeStateValues{
{
currentState: &params{}, event: mBlockResponse("P1", 3),
wantState: &params{items: []pcBlock{{"P1", 3}}}, wantNextEvent: noOp,
},
{ // use previous wantState as currentState,
event: mBlockResponse("P1", 4),
wantState: &params{items: []pcBlock{{"P1", 3}, {"P1", 4}}}, wantNextEvent: noOp,
},
},
},
}
executeProcessorTests(t, tests)
}
func TestRProcessBlockSuccess(t *testing.T) {
tests := []testFields{
{
name: "noop - no blocks over current height",
steps: []pcFsmMakeStateValues{
{
currentState: &params{}, event: rProcessBlock{},
wantState: &params{}, wantNextEvent: noOp,
},
},
},
{
name: "noop - high new blocks",
steps: []pcFsmMakeStateValues{
{
currentState: &params{height: 5, items: []pcBlock{{"P1", 30}, {"P2", 31}}}, event: rProcessBlock{},
wantState: &params{height: 5, items: []pcBlock{{"P1", 30}, {"P2", 31}}}, wantNextEvent: noOp,
},
},
},
{
name: "blocks H+1 and H+2 present",
steps: []pcFsmMakeStateValues{
{
currentState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}}}, event: rProcessBlock{},
wantState: &params{height: 1, items: []pcBlock{{"P2", 2}}, blocksSynced: 1},
wantNextEvent: pcBlockProcessed{height: 1, peerID: "P1"},
},
},
},
{
name: "blocks H+1 and H+2 present after draining",
steps: []pcFsmMakeStateValues{
{ // some contiguous blocks - on stop check draining is set
currentState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}, {"P1", 4}}},
event: scFinishedEv{},
wantState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}, {"P1", 4}}, draining: true},
wantNextEvent: noOp,
},
{
event: rProcessBlock{},
wantState: &params{height: 1, items: []pcBlock{{"P2", 2}, {"P1", 4}}, blocksSynced: 1, draining: true},
wantNextEvent: pcBlockProcessed{height: 1, peerID: "P1"},
},
{ // finish when H+1 or/and H+2 are missing
event: rProcessBlock{},
wantState: &params{height: 1, items: []pcBlock{{"P2", 2}, {"P1", 4}}, blocksSynced: 1, draining: true},
wantNextEvent: pcFinished{tmState: tmState.State{LastBlockHeight: 1}, blocksSynced: 1},
},
},
},
}
executeProcessorTests(t, tests)
}
func TestRProcessBlockFailures(t *testing.T) {
tests := []testFields{
{
name: "blocks H+1 and H+2 present from different peers - H+1 verification fails ",
steps: []pcFsmMakeStateValues{
{
currentState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}}, verBL: []int64{1}}, event: rProcessBlock{},
wantState: &params{items: []pcBlock{}, verBL: []int64{1}},
wantNextEvent: pcBlockVerificationFailure{height: 1, firstPeerID: "P1", secondPeerID: "P2"},
},
},
},
{
name: "blocks H+1 and H+2 present from same peer - H+1 applyBlock fails ",
steps: []pcFsmMakeStateValues{
{
currentState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}}, appBL: []int64{1}}, event: rProcessBlock{},
wantState: &params{items: []pcBlock{}, appBL: []int64{1}}, wantPanic: true,
},
},
},
{
name: "blocks H+1 and H+2 present from same peers - H+1 verification fails ",
steps: []pcFsmMakeStateValues{
{
currentState: &params{height: 0, items: []pcBlock{{"P1", 1}, {"P1", 2}, {"P2", 3}},
verBL: []int64{1}}, event: rProcessBlock{},
wantState: &params{height: 0, items: []pcBlock{{"P2", 3}}, verBL: []int64{1}},
wantNextEvent: pcBlockVerificationFailure{height: 1, firstPeerID: "P1", secondPeerID: "P1"},
},
},
},
{
name: "blocks H+1 and H+2 present from different peers - H+1 applyBlock fails ",
steps: []pcFsmMakeStateValues{
{
currentState: &params{items: []pcBlock{{"P1", 1}, {"P2", 2}, {"P2", 3}}, appBL: []int64{1}},
event: rProcessBlock{},
wantState: &params{items: []pcBlock{{"P2", 3}}, appBL: []int64{1}}, wantPanic: true,
},
},
},
}
executeProcessorTests(t, tests)
}
func TestScFinishedEv(t *testing.T) {
tests := []testFields{
{
name: "no blocks",
steps: []pcFsmMakeStateValues{
{
currentState: &params{height: 100, items: []pcBlock{}, blocksSynced: 100}, event: scFinishedEv{},
wantState: &params{height: 100, items: []pcBlock{}, blocksSynced: 100},
wantNextEvent: pcFinished{tmState: tmState.State{LastBlockHeight: 100}, blocksSynced: 100},
},
},
},
{
name: "maxHeight+1 block present",
steps: []pcFsmMakeStateValues{
{
currentState: &params{height: 100, items: []pcBlock{
{"P1", 101}}, blocksSynced: 100}, event: scFinishedEv{},
wantState: &params{height: 100, items: []pcBlock{{"P1", 101}}, blocksSynced: 100},
wantNextEvent: pcFinished{tmState: tmState.State{LastBlockHeight: 100}, blocksSynced: 100},
},
},
},
{
name: "more blocks present",
steps: []pcFsmMakeStateValues{
{
currentState: &params{height: 100, items: []pcBlock{
{"P1", 101}, {"P1", 102}}, blocksSynced: 100}, event: scFinishedEv{},
wantState: &params{height: 100, items: []pcBlock{
{"P1", 101}, {"P1", 102}}, blocksSynced: 100, draining: true},
wantNextEvent: noOp,
wantErr: nil,
},
},
},
}
executeProcessorTests(t, tests)
}