e2e: test auth with guest access

e2e/ctl_v2_test.go

@@ -312,6 +312,30 @@ func TestCtlV2AuthWithCommonName(t *testing.T) {
 	}
 }
 
+func TestCtlV2AuthWithGuestRole(t *testing.T) {
+	defer testutil.AfterTest(t)
+
+	epc := setupEtcdctlTest(t, &configNoTLS, false)
+	defer func() {
+		if err := epc.Close(); err != nil {
+			t.Fatalf("error closing etcd processes (%v)", err)
+		}
+	}()
+
+	if err := etcdctlSet(epc, "foo", "bar"); err != nil {
+		t.Fatalf("failed to write (%v)", err)
+	}
+	if err := etcdctlUserAdd(epc, "root", "123"); err != nil {
+		t.Fatalf("failed to add user (%v)", err)
+	}
+	if err := etcdctlAuthEnable(epc); err != nil {
+		t.Fatalf("failed to enable auth (%v)", err)
+	}
+	if err := etcdctlGet(epc, "foo", "bar", false); err != nil {
+		t.Fatalf("failed to read (%v)", err)
+	}
+}
+
 func etcdctlPrefixArgs(clus *etcdProcessCluster) []string {
 	endpoints := ""
 	if proxies := clus.proxies(); len(proxies) != 0 {