From d62fd333b0b8f6a0eb953d6b7720093f3b58b977 Mon Sep 17 00:00:00 2001
From: Jonathan Paul Cook <Jonathan Paul Cook@esdw05.esa-ad.esa.int>
Date: Thu, 28 Feb 2019 17:09:00 +0100
Subject: [PATCH] BAEL-2512 - Add a new section in Mockito Spy article

---
 .../misusing/MockitoMisusingUnitTest.java     | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 testing-modules/mockito/src/test/java/org/baeldung/mockito/misusing/MockitoMisusingUnitTest.java

diff --git a/testing-modules/mockito/src/test/java/org/baeldung/mockito/misusing/MockitoMisusingUnitTest.java b/testing-modules/mockito/src/test/java/org/baeldung/mockito/misusing/MockitoMisusingUnitTest.java
new file mode 100644
index 0000000000..e2de23aa14
--- /dev/null
+++ b/testing-modules/mockito/src/test/java/org/baeldung/mockito/misusing/MockitoMisusingUnitTest.java
@@ -0,0 +1,30 @@
+package org.baeldung.mockito.misusing;
+
+import static org.hamcrest.core.StringContains.containsString;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.fail;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+import org.mockito.Mockito;
+import org.mockito.exceptions.misusing.NotAMockException;
+
+public class MockitoMisusingUnitTest {
+
+    @Test
+    public void givenNotASpy_whenDoReturn_thenThrowNotAMock() {
+        try {
+            List<String> list = new ArrayList<String>();
+            Mockito.doReturn(100)
+                .when(list)
+                .size();
+
+            fail("Should have thrown a NotAMockException because 'list' is not a mock!");
+        } catch (NotAMockException e) {
+            assertThat(e.getMessage(), containsString("Argument passed to when() is not a mock!"));
+        }
+    }
+
+}