xds: mock dual-stack bind lookup in delta tests

Author: sujay-hashicorp

agent/xds/xds_protocol_helpers_test.go

@@ -34,6 +34,7 @@ import (
 
 	"github.com/hashicorp/consul/agent/connect"
 	"github.com/hashicorp/consul/agent/grpc-external/limiter"
+	"github.com/hashicorp/consul/agent/netutil"
 	"github.com/hashicorp/consul/agent/proxycfg"
 	"github.com/hashicorp/consul/agent/structs"
 	"github.com/hashicorp/consul/agent/xds/response"
@@ -188,6 +189,8 @@ func newTestServerDeltaScenario(
 ) *testServerScenario {
 	mgr := newTestManager()
 	envoy := NewTestEnvoy(t, proxyID, token)
+	originalGetAgentBindAddr := netutil.GetAgentBindAddrFunc
+	netutil.GetAgentBindAddrFunc = netutil.GetMockGetAgentBindAddrFunc("0.0.0.0")
 
 	sink := metrics.NewInmemSink(1*time.Minute, 1*time.Minute)
 	cfg := metrics.DefaultConfig("consul.xds.test")
@@ -197,6 +200,7 @@ func newTestServerDeltaScenario(
 
 	t.Cleanup(func() {
 		envoy.Close()
+		netutil.GetAgentBindAddrFunc = originalGetAgentBindAddr
 		sink := &metrics.BlackholeSink{}
 		metrics.NewGlobal(cfg, sink)
 	})