lnd.xprv/lntest/itest/lnd_wumbo_channels_test.go
Olaoluwa Osuntokun c769247198
lntest: allow the main test files to be buildable w/o the rpctest build tag
In this commit, we modify our build tag set up to allow the main test
files to be buildable w/o the current rpctest tag. We do this so that
those of us that use extensions which will compile live files like
vim-go can once again fix compile errors as we go in our editors.

In order to do this, we now make an external `testsCases` variable, and
have two variants: one that's empty (no build tag), and one that's fully
populated with all our tests (build tag active). As a result, the main
file will now always build regardless of if the build tag is active or
not, but we'll only actually execute tests if the `testCases` variable
has been populated.

As sample run w/ the tag off:
```
=== RUN   TestLightningNetworkDaemon
--- PASS: TestLightningNetworkDaemon (0.00s)
PASS
ok  	github.com/lightningnetwork/lnd/lntest/itest	0.051s
```
2020-09-21 21:16:31 +02:00

91 lines
2.7 KiB
Go

package itest
import (
"context"
"strings"
"github.com/btcsuite/btcutil"
"github.com/lightningnetwork/lnd"
"github.com/lightningnetwork/lnd/lntest"
)
// testWumboChannels tests that only a node that signals wumbo channel
// acceptances will allow a wumbo channel to be created. Additionally, if a
// node is running with mini channels only enabled, then they should reject any
// inbound wumbo channel requests.
func testWumboChannels(net *lntest.NetworkHarness, t *harnessTest) {
// With all the channel types exercised, we'll now make sure the wumbo
// signalling support works properly.
//
// We'll make two new nodes, with one of them signalling support for
// wumbo channels while the other doesn't.
wumboNode, err := net.NewNode(
"wumbo", []string{"--protocol.wumbo-channels"},
)
if err != nil {
t.Fatalf("unable to create new node: %v", err)
}
defer shutdownAndAssert(net, t, wumboNode)
miniNode, err := net.NewNode("mini", nil)
if err != nil {
t.Fatalf("unable to create new node: %v", err)
}
defer shutdownAndAssert(net, t, miniNode)
// We'll send coins to the wumbo node, as it'll be the one imitating
// the channel funding.
ctxb := context.Background()
err = net.SendCoins(ctxb, btcutil.SatoshiPerBitcoin, wumboNode)
if err != nil {
t.Fatalf("unable to send coins to carol: %v", err)
}
// Next we'll connect both nodes, then attempt to make a wumbo channel
// funding request to the mini node we created above. The wumbo request
// should fail as the node isn't advertising wumbo channels.
err = net.EnsureConnected(ctxb, wumboNode, miniNode)
if err != nil {
t.Fatalf("unable to connect peers: %v", err)
}
chanAmt := lnd.MaxBtcFundingAmount + 1
_, err = net.OpenChannel(
ctxb, wumboNode, miniNode, lntest.OpenChannelParams{
Amt: chanAmt,
},
)
if err == nil {
t.Fatalf("expected wumbo channel funding to fail")
}
// The test should indicate a failure due to the channel being too
// large.
if !strings.Contains(err.Error(), "exceeds maximum chan size") {
t.Fatalf("channel should be rejected due to size, instead "+
"error was: %v", err)
}
// We'll now make another wumbo node to accept our wumbo channel
// funding.
wumboNode2, err := net.NewNode(
"wumbo2", []string{"--protocol.wumbo-channels"},
)
if err != nil {
t.Fatalf("unable to create new node: %v", err)
}
defer shutdownAndAssert(net, t, wumboNode2)
// Creating a wumbo channel between these two nodes should succeed.
err = net.EnsureConnected(ctxb, wumboNode, wumboNode2)
if err != nil {
t.Fatalf("unable to connect peers: %v", err)
}
chanPoint := openChannelAndAssert(
ctxb, t, net, wumboNode, wumboNode2,
lntest.OpenChannelParams{
Amt: chanAmt,
},
)
closeChannelAndAssert(ctxb, t, net, wumboNode, chanPoint, false)
}