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      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      */
     39     protected Activity getActivity() {
     40         return mActivity;
     41     }
     42 
     43     /**
     44      * Set the activity under test.
     45      * @param testActivity The activity under test
     46      */
     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      */
     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