WifiStressTest.java revision 2f19a3103c2cdcf5613eb70493122fb366d509ef 
1/*
2 * Copyright (C) 2010, 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
17package com.android.connectivitymanagertest.stress;
18
19import android.content.Context;
20import android.net.ConnectivityManager;
21import android.net.NetworkInfo.State;
22import android.net.wifi.ScanResult;
23import android.net.wifi.WifiConfiguration;
24import android.net.wifi.WifiConfiguration.IpAssignment;
25import android.net.wifi.WifiConfiguration.KeyMgmt;
26import android.net.wifi.WifiConfiguration.ProxySettings;
27import android.net.wifi.WifiManager;
28import android.os.Environment;
29import android.os.PowerManager;
30import android.provider.Settings;
31import android.test.ActivityInstrumentationTestCase2;
32import android.test.suitebuilder.annotation.LargeTest;
33import android.util.Log;
34
35import com.android.connectivitymanagertest.ConnectivityManagerStressTestRunner;
36import com.android.connectivitymanagertest.ConnectivityManagerTestActivity;
37
38import java.io.BufferedWriter;
39import java.io.File;
40import java.io.FileWriter;
41import java.io.IOException;
42import java.util.List;
43
44/**
45 * Stress Wi-Fi connection, scanning and reconnection after sleep.
46 *
47 * To run this stress test suite, type
48 * adb shell am instrument -e class com.android.connectivitymanagertest.stress.WifiStressTest
49 *                  -w com.android.connectivitymanagertest/.ConnectivityManagerStressTestRunner
50 */
51public class WifiStressTest
52    extends ActivityInstrumentationTestCase2<ConnectivityManagerTestActivity> {
53    private final static String TAG = "WifiStressTest";
54
55    /**
56     * Wi-Fi idle time for default sleep policy
57     */
58    private final static long WIFI_IDLE_MS = 60 * 1000;
59
60    /**
61     * Delay after issuing wifi shutdown.
62     * The framework keep driver up for at leat 2 minutes to avoid problems
63     * that a quick shutdown could cause on wext driver and protentially
64     * on cfg based driver
65     */
66    private final static long WIFI_SHUTDOWN_DELAY = 2 * 60 * 1000;
67
68    private final static String OUTPUT_FILE = "WifiStressTestOutput.txt";
69    private ConnectivityManagerTestActivity mAct;
70    private int mReconnectIterations;
71    private int mWifiSleepTime;
72    private int mScanIterations;
73    private String mSsid;
74    private String mPassword;
75    private ConnectivityManagerStressTestRunner mRunner;
76    private BufferedWriter mOutputWriter = null;
77    private boolean mWifiOnlyFlag;
78
79    public WifiStressTest() {
80        super(ConnectivityManagerTestActivity.class);
81    }
82
83    @Override
84    public void setUp() throws Exception {
85        super.setUp();
86
87        mAct = getActivity();
88        mRunner = (ConnectivityManagerStressTestRunner) getInstrumentation();
89        mReconnectIterations = mRunner.mReconnectIterations;
90        mSsid = mRunner.mReconnectSsid;
91        mPassword = mRunner.mReconnectPassword;
92        mScanIterations = mRunner.mScanIterations;
93        mWifiSleepTime = mRunner.mSleepTime;
94        mWifiOnlyFlag = mRunner.mWifiOnlyFlag;
95        log(String.format("mReconnectIterations(%d), mSsid(%s), mPassword(%s),"
96            + "mScanIterations(%d), mWifiSleepTime(%d)", mReconnectIterations, mSsid,
97            mPassword, mScanIterations, mWifiSleepTime));
98        mOutputWriter = new BufferedWriter(new FileWriter(new File(
99                Environment.getExternalStorageDirectory(), OUTPUT_FILE), true));
100        mAct.turnScreenOn();
101        if (!mAct.mWifiManager.isWifiEnabled()) {
102            log("Enable wi-fi before stress tests.");
103            if (!mAct.enableWifi()) {
104                tearDown();
105                fail("enable wifi failed.");
106            }
107            sleep(ConnectivityManagerTestActivity.SHORT_TIMEOUT,
108                    "Interruped while waiting for wifi on");
109        }
110    }
111
112    @Override
113    public void tearDown() throws Exception {
114        log("tearDown()");
115        if (mOutputWriter != null) {
116            mOutputWriter.close();
117        }
118        super.tearDown();
119    }
120
121    private void writeOutput(String s) {
122        log("write message: " + s);
123        if (mOutputWriter == null) {
124            log("no writer attached to file " + OUTPUT_FILE);
125            return;
126        }
127        try {
128            mOutputWriter.write(s + "\n");
129            mOutputWriter.flush();
130        } catch (IOException e) {
131            log("failed to write output.");
132        }
133    }
134
135    public void log(String message) {
136        Log.v(TAG, message);
137    }
138
139    private void sleep(long sometime, String errorMsg) {
140        try {
141            Thread.sleep(sometime);
142        } catch (InterruptedException e) {
143            fail(errorMsg);
144        }
145    }
146
147    /**
148     *  Stress Wifi Scanning
149     *  TODO: test the scanning quality for each frequency band
150     */
151    @LargeTest
152    public void testWifiScanning() {
153        int scanTimeSum = 0;
154        int i;
155        int ssidAppearInScanResultsCount = 0; // count times of given ssid appear in scan results.
156        for (i = 0; i < mScanIterations; i++) {
157            log("testWifiScanning: iteration: " + i);
158            int averageScanTime = 0;
159            if (i > 0) {
160                averageScanTime = scanTimeSum/i;
161            }
162            writeOutput(String.format("iteration %d out of %d",
163                    i, mScanIterations));
164            writeOutput(String.format("average scanning time is %d", averageScanTime));
165            writeOutput(String.format("ssid appear %d out of %d scan iterations",
166                    ssidAppearInScanResultsCount, i));
167            long startTime = System.currentTimeMillis();
168            mAct.scanResultAvailable = false;
169            assertTrue("start scan failed", mAct.mWifiManager.startScanActive());
170            while (true) {
171                if ((System.currentTimeMillis() - startTime) >
172                ConnectivityManagerTestActivity.WIFI_SCAN_TIMEOUT) {
173                    fail("Wifi scanning takes more than " +
174                            ConnectivityManagerTestActivity.WIFI_SCAN_TIMEOUT + " ms");
175                }
176                synchronized(mAct) {
177                    try {
178                        mAct.wait(ConnectivityManagerTestActivity.WAIT_FOR_SCAN_RESULT);
179                    } catch (InterruptedException e) {
180                        e.printStackTrace();
181                    }
182                    if (mAct.scanResultAvailable) {
183                        long scanTime = (System.currentTimeMillis() - startTime);
184                        scanTimeSum += scanTime;
185                        break;
186                    }
187                }
188            }
189            if ((mAct.mWifiManager.getScanResults() == null) ||
190                    (mAct.mWifiManager.getScanResults().size() <= 0)) {
191                fail("Scan results are empty ");
192            }
193
194            List<ScanResult> netList = mAct.mWifiManager.getScanResults();
195            if (netList != null) {
196                log("size of scan result list: " + netList.size());
197                for (int s = 0; s < netList.size(); s++) {
198                    ScanResult sr= netList.get(s);
199                    log(String.format("scan result for %s is: %s", sr.SSID, sr.toString()));
200                    log(String.format("signal level for %s is %d ", sr.SSID, sr.level));
201                    if (sr.SSID.equals(mSsid)) {
202                        ssidAppearInScanResultsCount += 1;
203                        log("Number of times " + mSsid + " appear in the scan list: " +
204                                ssidAppearInScanResultsCount);
205                        break;
206                    }
207                }
208            }
209        }
210        if (i == mScanIterations) {
211            writeOutput(String.format("iteration %d out of %d",
212                    i, mScanIterations));
213            writeOutput(String.format("average scanning time is %d", scanTimeSum/mScanIterations));
214            writeOutput(String.format("ssid appear %d out of %d scan iterations",
215                    ssidAppearInScanResultsCount, mScanIterations));
216        }
217    }
218
219    // Stress Wifi reconnection to secure net after sleep
220    @LargeTest
221    public void testWifiReconnectionAfterSleep() {
222        int value = Settings.System.getInt(mRunner.getContext().getContentResolver(),
223                Settings.System.WIFI_SLEEP_POLICY, -1);
224        if (value < 0) {
225            Settings.System.putInt(mRunner.getContext().getContentResolver(),
226                    Settings.System.WIFI_SLEEP_POLICY, Settings.System.WIFI_SLEEP_POLICY_DEFAULT);
227            log("set wifi sleep policy to default value");
228        }
229        Settings.Secure.putLong(mRunner.getContext().getContentResolver(),
230                Settings.Secure.WIFI_IDLE_MS, WIFI_IDLE_MS);
231
232        // Connect to a Wi-Fi network
233        WifiConfiguration config = new WifiConfiguration();
234        config.SSID = mSsid;
235        config.allowedKeyManagement.set(KeyMgmt.WPA_PSK);
236        if (mPassword.matches("[0-9A-Fa-f]{64}")) {
237            config.preSharedKey = mPassword;
238        } else {
239            config.preSharedKey = '"' + mPassword + '"';
240        }
241        config.ipAssignment = IpAssignment.DHCP;
242        config.proxySettings = ProxySettings.NONE;
243
244        assertTrue("Failed to connect to Wi-Fi network: " + mSsid,
245                mAct.connectToWifiWithConfiguration(config));
246        assertTrue(mAct.waitForWifiState(WifiManager.WIFI_STATE_ENABLED,
247                ConnectivityManagerTestActivity.SHORT_TIMEOUT));
248        assertTrue(mAct.waitForNetworkState(ConnectivityManager.TYPE_WIFI, State.CONNECTED,
249                ConnectivityManagerTestActivity.LONG_TIMEOUT));
250        // Run ping test to verify the data connection
251        assertTrue("Wi-Fi is connected, but no data connection.", mAct.pingTest(null));
252
253        int i;
254        long sum = 0;
255        for (i = 0; i < mReconnectIterations; i++) {
256            // 1. Put device into sleep mode
257            // 2. Wait for the device to sleep for sometime, verify wi-fi is off and mobile is on.
258            // 3. Maintain the sleep mode for some time,
259            // 4. Verify the Wi-Fi is still off, and data is on
260            // 5. Wake up the device, verify Wi-Fi is enabled and connected.
261            writeOutput(String.format("iteration %d out of %d",
262                    i, mReconnectIterations));
263            log("iteration: " + i);
264            mAct.turnScreenOff();
265            PowerManager pm =
266                (PowerManager)mRunner.getContext().getSystemService(Context.POWER_SERVICE);
267            assertFalse(pm.isScreenOn());
268            sleep(WIFI_IDLE_MS + WIFI_SHUTDOWN_DELAY, "Interruped while wait for wifi to be idle");
269            assertTrue("Wait for Wi-Fi to idle timeout",
270                    mAct.waitForNetworkState(ConnectivityManager.TYPE_WIFI, State.DISCONNECTED,
271                    6 * ConnectivityManagerTestActivity.SHORT_TIMEOUT));
272            if (!mWifiOnlyFlag) {
273                // use long timeout as the pppd startup may take several retries.
274                assertTrue("Wait for cellular connection timeout",
275                        mAct.waitForNetworkState(ConnectivityManager.TYPE_MOBILE, State.CONNECTED,
276                        2 * ConnectivityManagerTestActivity.LONG_TIMEOUT));
277            }
278            sleep(mWifiSleepTime, "Interrupted while device is in sleep mode");
279            // Verify the wi-fi is still off and data connection is on
280            assertEquals("Wi-Fi is reconnected", State.DISCONNECTED,
281                    mAct.mCM.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState());
282
283            if (!mWifiOnlyFlag) {
284                assertEquals("Cellular connection is down", State.CONNECTED,
285                             mAct.mCM.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState());
286                assertTrue("Mobile is connected, but no data connection.", mAct.pingTest(null));
287            }
288
289            // Turn screen on again
290            mAct.turnScreenOn();
291            // Measure the time for Wi-Fi to get connected
292            long startTime = System.currentTimeMillis();
293            assertTrue("Wait for Wi-Fi enable timeout after wake up",
294                    mAct.waitForWifiState(WifiManager.WIFI_STATE_ENABLED,
295                    ConnectivityManagerTestActivity.SHORT_TIMEOUT));
296            assertTrue("Wait for Wi-Fi connection timeout after wake up",
297                    mAct.waitForNetworkState(ConnectivityManager.TYPE_WIFI, State.CONNECTED,
298                    6 * ConnectivityManagerTestActivity.LONG_TIMEOUT));
299            long connectionTime = System.currentTimeMillis() - startTime;
300            sum += connectionTime;
301            log("average reconnection time is: " + sum/(i+1));
302
303            assertTrue("Reconnect to Wi-Fi network, but no data connection.", mAct.pingTest(null));
304        }
305        if (i == mReconnectIterations) {
306            writeOutput(String.format("iteration %d out of %d",
307                    i, mReconnectIterations));
308        }
309    }
310}
311