1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.test;
18 
19 import android.app.Activity;
20 
21 import java.lang.reflect.Field;
22 import java.lang.reflect.Modifier;
23 
24 /**
25  * This is common code used to support Activity test cases.  For more useful classes, please see
26  * {@link android.test.ActivityUnitTestCase} and
27  * {@link android.test.ActivityInstrumentationTestCase}.
28  */
29 public abstract class ActivityTestCase extends InstrumentationTestCase {
30 
31     /**
32      * The activity that will be set up for use in each test method.
33      */
34     private Activity mActivity;
35 
36     /**
37      * @return Returns the activity under test.
38      */
getActivity()39     protected Activity getActivity() {
40         return mActivity;
41     }
42 
43     /**
44      * Set the activity under test.
45      * @param testActivity The activity under test
46      */
setActivity(Activity testActivity)47     protected void setActivity(Activity testActivity) {
48         mActivity = testActivity;
49     }
50 
51     /**
52      * This function is called by various TestCase implementations, at tearDown() time, in order
53      * to scrub out any class variables.  This protects against memory leaks in the case where a
54      * test case creates a non-static inner class (thus referencing the test case) and gives it to
55      * someone else to hold onto.
56      *
57      * @param testCaseClass The class of the derived TestCase implementation.
58      *
59      * @throws IllegalAccessException
60      */
scrubClass(final Class<?> testCaseClass)61     protected void scrubClass(final Class<?> testCaseClass)
62     throws IllegalAccessException {
63         final Field[] fields = getClass().getDeclaredFields();
64         for (Field field : fields) {
65             final Class<?> fieldClass = field.getDeclaringClass();
66             if (testCaseClass.isAssignableFrom(fieldClass) && !field.getType().isPrimitive()
67                     && (field.getModifiers() & Modifier.FINAL) == 0) {
68                 try {
69                     field.setAccessible(true);
70                     field.set(this, null);
71                 } catch (Exception e) {
72                     android.util.Log.d("TestCase", "Error: Could not nullify field!");
73                 }
74 
75                 if (field.get(this) != null) {
76                     android.util.Log.d("TestCase", "Error: Could not nullify field!");
77                 }
78             }
79         }
80     }
81 
82 
83 
84 }
85