itest: ensure that native SQL LND won't start if it has any KV invoices

itest/lnd_misc_test.go

@@ -1,6 +1,7 @@
 package itest
 
 import (
+	"context"
 	"encoding/hex"
 	"fmt"
 	"io/ioutil"
@@ -1242,3 +1243,41 @@ func testSignVerifyMessageWithAddr(ht *lntest.HarnessTest) {
 
 	require.False(ht, respValid.Valid, "external signature did validate")
 }
+
+// testNativeSQLNoMigration tests that nodes that have invoices would not start
+// up with native SQL enabled, as we don't currently support migration of KV
+// invoices to the new SQL schema.
+func testNativeSQLNoMigration(ht *lntest.HarnessTest) {
+	alice := ht.Alice
+
+	// Make sure we run the test with SQLite or Postgres.
+	if alice.Cfg.DBBackend != node.BackendSqlite &&
+		alice.Cfg.DBBackend != node.BackendPostgres {
+
+		ht.Skip("node not running with SQLite or Postgres")
+	}
+
+	// Skip the test if the node is already running with native SQL.
+	if alice.Cfg.NativeSQL {
+		ht.Skip("node already running with native SQL")
+	}
+
+	alice.RPC.AddInvoice(&lnrpc.Invoice{
+		Value: 10_000,
+	})
+
+	alice.SetExtraArgs([]string{"--db.use-native-sql"})
+
+	// Restart the node manually as we're really only interested in the
+	// startup error.
+	require.NoError(ht, alice.Stop())
+	require.NoError(ht, alice.StartLndCmd(context.Background()))
+
+	// We expect the node to fail to start up with native SQL enabled, as we
+	// have an invoice in the KV store.
+	require.Error(ht, alice.WaitForProcessExit())
+
+	// Reset the extra args and restart alice.
+	alice.SetExtraArgs(nil)
+	require.NoError(ht, alice.Start(ht.Context()))
+}