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itest: fix REST WebSocket ping/pong itest

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This commit fixes a flake in the REST itest that was caused by an
invoice being created before the actual subscription client was
registered.
This commit is contained in:
Oliver Gugger 2021-10-29 09:50:27 +02:00
parent 32101db873
commit 2ca3eea3f7
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1 changed files with 10 additions and 0 deletions
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10
lntest/itest/lnd_rest_api_test.go
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@ -638,6 +638,16 @@ func wsTestPingPongTimeout(ht *harnessTest, net *lntest.NetworkHarness) {
}
}()
// The SubscribeInvoices call returns immediately after the gRPC/REST
// connection is established. But it can happen that the goroutine in
// lnd that actually registers the subscriber in the invoice backend
// didn't get any CPU time just yet. So we can run into the situation
// where we add our first invoice _before_ the subscription client is
// registered. If that happens, we'll never get notified about the
// invoice in question. So all we really can do is wait a bit here to
// make sure the subscription is registered correctly.
time.Sleep(500 * time.Millisecond)
// Let's create five invoices and wait for them to arrive. We'll wait
// for at least one ping/pong cycle between each invoice.
ctxb := context.Background()