Add robustness test scenario for issue #20221 (fix #20229)

Signed-off-by: Chun-Hung Tseng <henrytseng@google.com>

Author: henrybear327

tests/robustness/Makefile

@@ -75,6 +75,11 @@ test-robustness-issue19179: /tmp/etcd-v3.5.17-failpoints/bin
 	GO_TEST_FLAGS='-v -run=TestRobustnessRegression/Issue19179 -count 200 -failfast --bin-dir=/tmp/etcd-v3.5.17-failpoints/bin' $(TOPLEVEL_MAKE) test-robustness && \
 	  echo "Failed to reproduce" || echo "Successful reproduction"
 
+.PHONY: test-robustness-issue20221-fix20229
+test-robustness-issue20221-fix20229: /tmp/etcd-bc47e771-failpoints/bin
+	GO_TEST_FLAGS='-v --run=TestRobustnessRegression/Issue20221_fix20229 --count 100 --failfast --bin-dir=/tmp/etcd-bc47e771-failpoints/bin' $(TOPLEVEL_MAKE) test-robustness && \
+	 echo "Failed to reproduce" || echo "Successful reproduction"
+
 # Etcd API usage by Kubernetes
 
 .PHONY: k8s-coverage
@@ -120,11 +125,25 @@ $(GOPATH)/bin/gofail: $(REPOSITORY_ROOT)/tools/mod/go.mod $(REPOSITORY_ROOT)/too
 	  $(MAKE) gofail-enable; \
 	  $(MAKE) build;
 
-/tmp/etcd-v3.6.0-failpoints/bin: $(GOPATH)/bin/gofail
-	rm -rf /tmp/etcd-v3.6.0-failpoints/
-	mkdir -p /tmp/etcd-v3.6.0-failpoints/
-	cd /tmp/etcd-v3.6.0-failpoints/; \
-	  git clone --depth 1 --branch main https://github.com/etcd-io/etcd.git .; \
+# Please keep the version in the target name to enable the autocomplete feature for the Makefile.
+/tmp/etcd-v3.6.0-failpoints/bin:
+/tmp/etcd-v3.6.%-failpoints/bin: $(GOPATH)/bin/gofail
+	rm -rf /tmp/etcd-v3.6.$*-failpoints/
+	mkdir -p /tmp/etcd-v3.6.$*-failpoints/
+	cd /tmp/etcd-v3.6.$*-failpoints/; \
+	  git clone --depth 1 --branch v3.6.$* https://github.com/etcd-io/etcd.git .; \
+	  $(MAKE) gofail-enable; \
+	  $(MAKE) build;
+
+# Build from specific commit for Issue #20221 Bug A (broke Bookmarkable)
+/tmp/etcd-bc47e771-failpoints/bin: $(GOPATH)/bin/gofail
+	rm -rf /tmp/etcd-bc47e771-failpoints/
+	mkdir -p /tmp/etcd-bc47e771-failpoints/
+	cd /tmp/etcd-bc47e771-failpoints/; \
+	  git init; \
+	  git remote add origin https://github.com/etcd-io/etcd.git; \
+	  git fetch --depth 1 origin bc47e7711664ec5557c5ae528d0d02175ea6e166; \
+	  git checkout FETCH_HEAD; \
 	  $(MAKE) gofail-enable; \
 	  $(MAKE) build;
 

tests/robustness/scenarios/scenarios.go

@@ -271,6 +271,22 @@ func Regression(t *testing.T) []TestScenario {
 			e2e.WithGoFailEnabled(true),
 		),
 	})
+	scenarios = append(scenarios, TestScenario{
+		Name:      "Issue20221_fix20229",
+		Failpoint: failpoint.BlackholeUntilSnapshot,
+		Watch: client.WatchConfig{
+			RequestProgress: true,
+		},
+		Profile: traffic.HighTrafficProfile,
+		Traffic: traffic.EtcdPut,
+		Cluster: *e2e.NewConfig(
+			e2e.WithSnapshotCount(10),
+			e2e.WithPeerProxy(true),
+			e2e.WithIsPeerTLS(true),
+			e2e.WithWatchProcessNotifyInterval(10*time.Millisecond),
+			e2e.WithSnapshotCatchUpEntries(10),
+		),
+	})
 	if v.Compare(version.V3_5) >= 0 {
 		opts := []e2e.EPClusterOption{
 			e2e.WithSnapshotCount(100),
@@ -288,5 +304,6 @@ func Regression(t *testing.T) []TestScenario {
 			Cluster:   *e2e.NewConfig(opts...),
 		})
 	}
+
 	return scenarios
 }