From 38d4b75ab39b722a3e06028e84b6f4b0ce9b5c0e Mon Sep 17 00:00:00 2001
From: "R.B. Boyer" <4903+rboyer@users.noreply.github.com>
Date: Wed, 16 Jun 2021 11:57:43 -0500
Subject: [PATCH] xds: fix flaky protocol tests (#10410)

---
 agent/xds/delta_test.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/agent/xds/delta_test.go b/agent/xds/delta_test.go
index 288ea1a47..028fca043 100644
--- a/agent/xds/delta_test.go
+++ b/agent/xds/delta_test.go
@@ -191,6 +191,9 @@ func TestServer_DeltaAggregatedResources_v3_BasicProtocol_TCP(t *testing.T) {
 		snap = newTestSnapshot(t, snap, "")
 		mgr.DeliverConfig(t, sid, snap)
 
+		// We never send an EDS reply about this change.
+		assertDeltaChanBlocked(t, envoy.deltaStream.sendCh)
+
 		// and fix the subscription
 		envoy.SendDeltaReq(t, EndpointType, &envoy_discovery_v3.DeltaDiscoveryRequest{
 			ResourceNamesSubscribe: []string{
@@ -249,6 +252,9 @@ func TestServer_DeltaAggregatedResources_v3_BasicProtocol_TCP(t *testing.T) {
 		// Trigger only an EDS update (flipping BACK to 2 endpoints in the LBassignment)
 		snap = newTestSnapshot(t, snap, "")
 		mgr.DeliverConfig(t, sid, snap)
+
+		// We never send any replies about this change because we died.
+		assertDeltaChanBlocked(t, envoy.deltaStream.sendCh)
 	})
 
 	envoy.Close()