[WIP] Adding Mockito support in Android instrumentation tests

chrome/android/javatests/src/org/chromium/chrome/test/MockitoTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/test/MockitoTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/test/MockitoTest.java b/chrome/android/javatests/src/org/chromium/chrome/test/MockitoTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..8faa723a8e6c94aca85b159a54c632763283a277
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/test/MockitoTest.java
@@ -0,0 +1,49 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.test;
+
+import static org.mockito.Mockito.anyInt;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+
+import android.support.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+
+import org.chromium.base.test.BaseJUnit4ClassRunner;
+
+/**
+ * Basic smoking test for Mockito on instrumentation tests.
+ */
+@RunWith(BaseJUnit4ClassRunner.class)
+public class MockitoTest {
+    private static class ClassToBeMocked {
+        public void foo(int value) {
+            bar(value);
+        }
+
+        public void bar(int value) {}
+    }
+
+    @SmallTest
+    @Test
+    public void testMocking() {
+        ClassToBeMocked m = Mockito.mock(ClassToBeMocked.class);
+        m.foo(1);
+        verify(m).foo(1);
+        verify(m, never()).bar(anyInt());
+    }
+
+    @SmallTest
+    @Test
+    public void testSpying() {
+        ClassToBeMocked m = Mockito.spy(new ClassToBeMocked());
+        m.foo(1);
+        verify(m).foo(1);
+        verify(m).bar(1);
+    }
+}