125 lines
2.5 KiB
Go
125 lines
2.5 KiB
Go
package kit
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import (
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"context"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/filecoin-project/lotus/miner"
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"github.com/stretchr/testify/require"
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)
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// BlockMiner is a utility that makes a test miner Mine blocks on a timer.
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type BlockMiner struct {
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t *testing.T
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miner *TestMiner
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nextNulls int64
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wg sync.WaitGroup
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cancel context.CancelFunc
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}
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func NewBlockMiner(t *testing.T, miner *TestMiner) *BlockMiner {
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return &BlockMiner{
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t: t,
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miner: miner,
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cancel: func() {},
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}
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}
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func (bm *BlockMiner) MineBlocks(ctx context.Context, blocktime time.Duration) {
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time.Sleep(time.Second)
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// wrap context in a cancellable context.
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ctx, bm.cancel = context.WithCancel(ctx)
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bm.wg.Add(1)
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go func() {
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defer bm.wg.Done()
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for {
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select {
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case <-time.After(blocktime):
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case <-ctx.Done():
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return
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}
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nulls := atomic.SwapInt64(&bm.nextNulls, 0)
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err := bm.miner.MineOne(ctx, miner.MineReq{
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InjectNulls: abi.ChainEpoch(nulls),
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Done: func(bool, abi.ChainEpoch, error) {},
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})
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switch {
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case err == nil: // wrap around
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case ctx.Err() != nil: // context fired.
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return
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default: // log error
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bm.t.Error(err)
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}
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}
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}()
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}
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// InjectNulls injects the specified amount of null rounds in the next
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// mining rounds.
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func (bm *BlockMiner) InjectNulls(rounds abi.ChainEpoch) {
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atomic.AddInt64(&bm.nextNulls, int64(rounds))
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}
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func (bm *BlockMiner) MineUntilBlock(ctx context.Context, fn *TestFullNode, cb func(abi.ChainEpoch)) {
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for i := 0; i < 1000; i++ {
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var (
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success bool
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err error
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epoch abi.ChainEpoch
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wait = make(chan struct{})
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)
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doneFn := func(win bool, ep abi.ChainEpoch, e error) {
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success = win
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err = e
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epoch = ep
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wait <- struct{}{}
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}
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mineErr := bm.miner.MineOne(ctx, miner.MineReq{Done: doneFn})
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require.NoError(bm.t, mineErr)
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<-wait
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require.NoError(bm.t, err)
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if success {
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// Wait until it shows up on the given full nodes ChainHead
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nloops := 50
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for i := 0; i < nloops; i++ {
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ts, err := fn.ChainHead(ctx)
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require.NoError(bm.t, err)
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if ts.Height() == epoch {
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break
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}
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require.NotEqual(bm.t, i, nloops-1, "block never managed to sync to node")
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time.Sleep(time.Millisecond * 10)
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}
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if cb != nil {
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cb(epoch)
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}
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return
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}
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bm.t.Log("did not Mine block, trying again", i)
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}
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bm.t.Fatal("failed to Mine 1000 times in a row...")
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}
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// Stop stops the block miner.
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func (bm *BlockMiner) Stop() {
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bm.t.Log("shutting down mining")
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bm.cancel()
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bm.wg.Wait()
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}
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