package client_test
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import (
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"context"
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"errors"
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"strings"
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"testing"
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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/rpc/client"
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"github.com/tendermint/tendermint/rpc/client/mock"
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"github.com/tendermint/tendermint/rpc/coretypes"
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)
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func TestWaitForHeight(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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// test with error result - immediate failure
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m := &mock.StatusMock{
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Call: mock.Call{
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Error: errors.New("bye"),
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},
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}
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r := mock.NewStatusRecorder(m)
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// connection failure always leads to error
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err := client.WaitForHeight(ctx, r, 8, nil)
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require.Error(t, err)
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require.Equal(t, "bye", err.Error())
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// we called status once to check
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require.Equal(t, 1, len(r.Calls))
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// now set current block height to 10
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m.Call = mock.Call{
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Response: &coretypes.ResultStatus{SyncInfo: coretypes.SyncInfo{LatestBlockHeight: 10}},
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}
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// we will not wait for more than 10 blocks
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err = client.WaitForHeight(ctx, r, 40, nil)
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require.Error(t, err)
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require.True(t, strings.Contains(err.Error(), "aborting"))
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// we called status once more to check
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require.Equal(t, 2, len(r.Calls))
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// waiting for the past returns immediately
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err = client.WaitForHeight(ctx, r, 5, nil)
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require.NoError(t, err)
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// we called status once more to check
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require.Equal(t, 3, len(r.Calls))
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// since we can't update in a background goroutine (test --race)
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// we use the callback to update the status height
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myWaiter := func(delta int64) error {
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// update the height for the next call
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m.Call.Response = &coretypes.ResultStatus{SyncInfo: coretypes.SyncInfo{LatestBlockHeight: 15}}
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return client.DefaultWaitStrategy(delta)
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}
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// we wait for a few blocks
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err = client.WaitForHeight(ctx, r, 12, myWaiter)
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require.NoError(t, err)
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// we called status once to check
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require.Equal(t, 5, len(r.Calls))
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pre := r.Calls[3]
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require.Nil(t, pre.Error)
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prer, ok := pre.Response.(*coretypes.ResultStatus)
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require.True(t, ok)
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assert.Equal(t, int64(10), prer.SyncInfo.LatestBlockHeight)
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post := r.Calls[4]
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require.Nil(t, post.Error)
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postr, ok := post.Response.(*coretypes.ResultStatus)
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require.True(t, ok)
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assert.Equal(t, int64(15), postr.SyncInfo.LatestBlockHeight)
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}
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