From 9838dca33acaf295e5d5c4f511deb6f8d78bb5b6 Mon Sep 17 00:00:00 2001
From: Jon Cook <jonathan.cook@erars.plus.com>
Date: Sun, 3 Mar 2019 15:18:14 +0100
Subject: [PATCH] BAEL-2512 - Add a new section in Mockito Spy article

---
 .../misusing/MockitoMisusingUnitTest.java     | 38 +++++++++++++++++++
 1 file changed, 38 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..306f53297a
--- /dev/null
+++ b/testing-modules/mockito/src/test/java/org/baeldung/mockito/misusing/MockitoMisusingUnitTest.java
@@ -0,0 +1,38 @@
+package org.baeldung.mockito.misusing;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.assertThat;
+import static org.junit.jupiter.api.Assertions.fail;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.After;
+import org.junit.Test;
+import org.mockito.Mockito;
+import org.mockito.exceptions.misusing.NotAMockException;
+import org.mockito.internal.progress.ThreadSafeMockingProgress;
+
+public class MockitoMisusingUnitTest {
+
+    @After
+    public void tearDown() {
+        ThreadSafeMockingProgress.mockingProgress().reset();
+    }
+    
+    @Test
+    public void givenNotASpy_whenDoReturn_thenThrowNotAMock() {
+        try {
+            List<String> list = new ArrayList<String>();
+
+            Mockito.doReturn(100, Mockito.withSettings().lenient())
+                .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!"));
+        }
+    }
+
+}