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 package android.app.cts; 17 18 import android.app.ActivityManager; 19 import android.os.Debug; 20 import android.os.Parcel; 21 import android.os.Process; 22 import android.test.AndroidTestCase; 23 24 public class ActivityManagerMemoryInfoTest extends AndroidTestCase { 25 protected ActivityManager.MemoryInfo mMemory; 26 27 @Override setUp()28 protected void setUp() throws Exception { 29 super.setUp(); 30 mMemory = new ActivityManager.MemoryInfo(); 31 } 32 testDescribeContents()33 public void testDescribeContents() { 34 assertEquals(0, mMemory.describeContents()); 35 } 36 testWriteToParcel()37 public void testWriteToParcel() throws Exception { 38 final long AVAILMEM = 1000l; 39 mMemory.availMem = AVAILMEM; 40 final long THRESHOLD = 500l; 41 mMemory.threshold = THRESHOLD; 42 final boolean LOWMEMORY = true; 43 mMemory.lowMemory = LOWMEMORY; 44 Parcel parcel = Parcel.obtain(); 45 mMemory.writeToParcel(parcel, 0); 46 parcel.setDataPosition(0); 47 ActivityManager.MemoryInfo values = 48 ActivityManager.MemoryInfo.CREATOR.createFromParcel(parcel); 49 assertEquals(AVAILMEM, values.availMem); 50 assertEquals(THRESHOLD, values.threshold); 51 assertEquals(LOWMEMORY, values.lowMemory); 52 53 // test null condition. 54 try { 55 mMemory.writeToParcel(null, 0); 56 fail("writeToParcel should throw out NullPointerException when Parcel is null"); 57 } catch (NullPointerException e) { 58 // expected 59 } 60 } 61 testReadFromParcel()62 public void testReadFromParcel() throws Exception { 63 final long AVAILMEM = 1000l; 64 mMemory.availMem = AVAILMEM; 65 final long THRESHOLD = 500l; 66 mMemory.threshold = THRESHOLD; 67 final boolean LOWMEMORY = true; 68 mMemory.lowMemory = LOWMEMORY; 69 Parcel parcel = Parcel.obtain(); 70 mMemory.writeToParcel(parcel, 0); 71 parcel.setDataPosition(0); 72 ActivityManager.MemoryInfo result = new ActivityManager.MemoryInfo(); 73 result.readFromParcel(parcel); 74 assertEquals(AVAILMEM, result.availMem); 75 assertEquals(THRESHOLD, result.threshold); 76 assertEquals(LOWMEMORY, result.lowMemory); 77 78 // test null condition. 79 result = new ActivityManager.MemoryInfo(); 80 try { 81 result.readFromParcel(null); 82 fail("readFromParcel should throw out NullPointerException when Parcel is null"); 83 } catch (NullPointerException e) { 84 // expected 85 } 86 } 87 testGetProcessMemoryInfo()88 public void testGetProcessMemoryInfo() { 89 // PID == 1 is the init process. 90 Debug.MemoryInfo[] result = getContext().getSystemService(ActivityManager.class) 91 .getProcessMemoryInfo(new int[]{1, Process.myPid(), 1}); 92 assertEquals(3, result.length); 93 isEmpty(result[0]); 94 isEmpty(result[2]); 95 isNotEmpty(result[1]); 96 } 97 isEmpty(Debug.MemoryInfo mi)98 private static void isEmpty(Debug.MemoryInfo mi) { 99 assertEquals(0, mi.dalvikPss); 100 assertEquals(0, mi.nativePss); 101 } 102 isNotEmpty(Debug.MemoryInfo mi)103 private static void isNotEmpty(Debug.MemoryInfo mi) { 104 assertTrue(mi.dalvikPss > 0); 105 assertTrue(mi.nativePss > 0); 106 } 107 } 108