From 22c22fce869b8f36f92d0abe8c9928fbe0c087a5 Mon Sep 17 00:00:00 2001
From: sheryllresulta <48046330+sheryllresulta@users.noreply.github.com>
Date: Mon, 18 Mar 2019 19:35:11 +0800
Subject: [PATCH] Update README.md

---
 testing-modules/groovy-spock/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/testing-modules/groovy-spock/README.md b/testing-modules/groovy-spock/README.md
index 18d26e8fc0..a98df27172 100644
--- a/testing-modules/groovy-spock/README.md
+++ b/testing-modules/groovy-spock/README.md
@@ -1,3 +1,4 @@
 ### Relevant articles
 
 - [Introduction to Testing with Spock and Groovy](http://www.baeldung.com/groovy-spock)
+- [Difference Between Stub, Mock, and Spy in the Spock Framework](https://www.baeldung.com/spock-stub-mock-spy)