fix: run tests in "dht server" mode

Otherwise, we'd need to wait a delay on start for nodes to start becoming
servers.

core/coreapi/test/api_test.go

@@ -13,6 +13,7 @@ import (
 	"github.com/ipfs/go-ipfs/core/bootstrap"
 	"github.com/ipfs/go-ipfs/core/coreapi"
 	mock "github.com/ipfs/go-ipfs/core/mock"
+	"github.com/ipfs/go-ipfs/core/node/libp2p"
 	"github.com/ipfs/go-ipfs/keystore"
 	"github.com/ipfs/go-ipfs/repo"
 
@@ -78,6 +79,7 @@ func (NodeProvider) MakeAPISwarm(ctx context.Context, fullIdentity bool, n int)
 		}
 
 		node, err := core.NewNode(ctx, &core.BuildCfg{
+			Routing: libp2p.DHTServerOption,
 			Repo:    r,
 			Host:    mock.MockHostOption(mn),
 			Online:  fullIdentity,

core/mock/mock.go

@@ -91,6 +91,7 @@ func MockPublicNode(ctx context.Context, mn mocknet.Mocknet) (*core.IpfsNode, er
 	cfg.Datastore = config.Datastore{}
 	return core.NewNode(ctx, &core.BuildCfg{
 		Online:  true,
+		Routing: libp2p2.DHTServerOption,
 		Repo: &repo.Mock{
 			C: *cfg,
 			D: ds,