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241 lines
5.7 KiB
241 lines
5.7 KiB
package statesync
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import (
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"math/rand"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/tendermint/tendermint/internal/p2p"
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"github.com/tendermint/tendermint/internal/test/factory"
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)
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var (
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startHeight int64 = 200
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stopHeight int64 = 100
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stopTime = time.Date(2019, 1, 1, 1, 0, 0, 0, time.UTC)
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endTime = stopTime.Add(-1 * time.Second)
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numWorkers = 1
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)
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func TestBlockQueueBasic(t *testing.T) {
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peerID, err := p2p.NewNodeID("0011223344556677889900112233445566778899")
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require.NoError(t, err)
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queue := newBlockQueue(startHeight, stopHeight, stopTime, 1)
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wg := &sync.WaitGroup{}
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// asynchronously fetch blocks and add it to the queue
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for i := 0; i <= numWorkers; i++ {
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wg.Add(1)
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go func() {
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for {
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select {
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case height := <-queue.nextHeight():
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queue.add(mockLBResp(t, peerID, height, endTime))
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case <-queue.done():
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wg.Done()
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return
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}
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}
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}()
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}
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trackingHeight := startHeight
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wg.Add(1)
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loop:
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for {
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select {
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case <-queue.done():
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wg.Done()
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break loop
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case resp := <-queue.verifyNext():
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// assert that the queue serializes the blocks
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require.Equal(t, resp.block.Height, trackingHeight)
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trackingHeight--
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queue.success(resp.block.Height)
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}
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}
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wg.Wait()
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assert.Less(t, trackingHeight, stopHeight)
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}
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// Test with spurious failures and retries
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func TestBlockQueueWithFailures(t *testing.T) {
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peerID, err := p2p.NewNodeID("0011223344556677889900112233445566778899")
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require.NoError(t, err)
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queue := newBlockQueue(startHeight, stopHeight, stopTime, 200)
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wg := &sync.WaitGroup{}
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failureRate := 4
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for i := 0; i <= numWorkers; i++ {
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wg.Add(1)
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go func() {
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for {
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select {
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case height := <-queue.nextHeight():
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if rand.Intn(failureRate) == 0 {
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queue.retry(height)
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} else {
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queue.add(mockLBResp(t, peerID, height, endTime))
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}
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case <-queue.done():
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wg.Done()
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return
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}
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}
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}()
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}
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trackingHeight := startHeight
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for {
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select {
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case resp := <-queue.verifyNext():
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// assert that the queue serializes the blocks
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assert.Equal(t, resp.block.Height, trackingHeight)
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if rand.Intn(failureRate) == 0 {
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queue.retry(resp.block.Height)
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} else {
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trackingHeight--
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queue.success(resp.block.Height)
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}
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case <-queue.done():
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wg.Wait()
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assert.Less(t, trackingHeight, stopHeight)
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return
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}
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}
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}
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// Test that when all the blocks are retrieved that the queue still holds on to
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// it's workers and in the event of failure can still fetch the failed block
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func TestBlockQueueBlocks(t *testing.T) {
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peerID, err := p2p.NewNodeID("0011223344556677889900112233445566778899")
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require.NoError(t, err)
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queue := newBlockQueue(startHeight, stopHeight, stopTime, 2)
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expectedHeight := startHeight
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retryHeight := stopHeight + 2
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loop:
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for {
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select {
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case height := <-queue.nextHeight():
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require.Equal(t, height, expectedHeight)
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require.GreaterOrEqual(t, height, stopHeight)
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expectedHeight--
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queue.add(mockLBResp(t, peerID, height, endTime))
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case <-time.After(1 * time.Second):
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if expectedHeight >= stopHeight {
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t.Fatalf("expected next height %d", expectedHeight)
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}
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break loop
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}
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}
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// close any waiter channels that the previous worker left hanging
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for _, ch := range queue.waiters {
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close(ch)
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}
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queue.waiters = make([]chan int64, 0)
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wg := &sync.WaitGroup{}
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wg.Add(1)
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// so far so good. The worker is waiting. Now we fail a previous
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// block and check that the worker fetches them
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go func(t *testing.T) {
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defer wg.Done()
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select {
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case height := <-queue.nextHeight():
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require.Equal(t, retryHeight, height)
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case <-time.After(1 * time.Second):
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require.Fail(t, "queue didn't ask worker to fetch failed height")
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}
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}(t)
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queue.retry(retryHeight)
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wg.Wait()
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}
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func TestBlockQueueAcceptsNoMoreBlocks(t *testing.T) {
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peerID, err := p2p.NewNodeID("0011223344556677889900112233445566778899")
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require.NoError(t, err)
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queue := newBlockQueue(startHeight, stopHeight, stopTime, 1)
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defer queue.close()
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loop:
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for {
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select {
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case height := <-queue.nextHeight():
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require.GreaterOrEqual(t, height, stopHeight)
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queue.add(mockLBResp(t, peerID, height, endTime))
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case <-time.After(1 * time.Second):
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break loop
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}
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}
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require.Len(t, queue.pending, int(startHeight-stopHeight)+1)
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queue.add(mockLBResp(t, peerID, stopHeight-1, endTime))
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require.Len(t, queue.pending, int(startHeight-stopHeight)+1)
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}
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// Test a scenario where more blocks are needed then just the stopheight because
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// we haven't found a block with a small enough time.
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func TestBlockQueueStopTime(t *testing.T) {
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peerID, err := p2p.NewNodeID("0011223344556677889900112233445566778899")
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require.NoError(t, err)
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queue := newBlockQueue(startHeight, stopHeight, stopTime, 1)
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wg := &sync.WaitGroup{}
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baseTime := stopTime.Add(-50 * time.Second)
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// asynchronously fetch blocks and add it to the queue
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for i := 0; i <= numWorkers; i++ {
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wg.Add(1)
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go func() {
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for {
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select {
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case height := <-queue.nextHeight():
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blockTime := baseTime.Add(time.Duration(height) * time.Second)
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queue.add(mockLBResp(t, peerID, height, blockTime))
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case <-queue.done():
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wg.Done()
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return
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}
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}
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}()
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}
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trackingHeight := startHeight
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for {
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select {
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case resp := <-queue.verifyNext():
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// assert that the queue serializes the blocks
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assert.Equal(t, resp.block.Height, trackingHeight)
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trackingHeight--
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queue.success(resp.block.Height)
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case <-queue.done():
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wg.Wait()
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assert.Less(t, trackingHeight, stopHeight-50)
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return
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}
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}
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}
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func mockLBResp(t *testing.T, peer p2p.NodeID, height int64, time time.Time) lightBlockResponse {
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return lightBlockResponse{
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block: mockLB(t, height, time, factory.MakeBlockID()),
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peer: peer,
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}
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}
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