WifiStressTest.java revision 776cca3b3a84cd16bdaccdd43963cc34d923e0a4 
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        mAct = getActivity();
87        mRunner = (ConnectivityManagerStressTestRunner) getInstrumentation();
88        mReconnectIterations = mRunner.mReconnectIterations;
89        mSsid = mRunner.mReconnectSsid;
90        mPassword = mRunner.mReconnectPassword;
91        mScanIterations = mRunner.mScanIterations;
92        mWifiSleepTime = mRunner.mSleepTime;
93        mWifiOnlyFlag = mRunner.mWifiOnlyFlag;
94        log(String.format("mReconnectIterations(%d), mSsid(%s), mPassword(%s),"
95            + "mScanIterations(%d), mWifiSleepTime(%d)", mReconnectIterations, mSsid,
96            mPassword, mScanIterations, mWifiSleepTime));
97        mOutputWriter = new BufferedWriter(new FileWriter(new File(
98                Environment.getExternalStorageDirectory(), OUTPUT_FILE), true));
99        mAct.turnScreenOn();
100        if (!mAct.mWifiManager.isWifiEnabled()) {
101            log("Enable wi-fi before stress tests.");
102            if (!mAct.enableWifi()) {
103                tearDown();
104                fail("enable wifi failed.");
105            }
106            sleep(ConnectivityManagerTestActivity.SHORT_TIMEOUT,
107                    "Interruped while waiting for wifi on");
108        }
109    }
110
111    @Override
112    public void tearDown() throws Exception {
113        log("tearDown()");
114        if (mOutputWriter != null) {
115            mOutputWriter.close();
116        }
117        super.tearDown();
118    }
119
120    private void writeOutput(String s) {
121        log("write message: " + s);
122        if (mOutputWriter == null) {
123            log("no writer attached to file " + OUTPUT_FILE);
124            return;
125        }
126        try {
127            mOutputWriter.write(s + "\n");
128            mOutputWriter.flush();
129        } catch (IOException e) {
130            log("failed to write output.");
131        }
132    }
133
134    public void log(String message) {
135        Log.v(TAG, message);
136    }
137
138    private void sleep(long sometime, String errorMsg) {
139        try {
140            Thread.sleep(sometime);
141        } catch (InterruptedException e) {
142            fail(errorMsg);
143        }
144    }
145
146    /**
147     *  Stress Wifi Scanning
148     *  TODO: test the scanning quality for each frequency band
149     */
150    @LargeTest
151    public void testWifiScanning() {
152        int scanTimeSum = 0;
153        int i;
154        int ssidAppearInScanResultsCount = 0; // count times of given ssid appear in scan results.
155        for (i = 0; i < mScanIterations; i++) {
156            log("testWifiScanning: iteration: " + i);
157            int averageScanTime = 0;
158            if (i > 0) {
159                averageScanTime = scanTimeSum/i;
160            }
161            writeOutput(String.format("iteration %d out of %d",
162                    i, mScanIterations));
163            writeOutput(String.format("average scanning time is %d", averageScanTime));
164            writeOutput(String.format("ssid appear %d out of %d scan iterations",
165                    ssidAppearInScanResultsCount, i));
166            long startTime = System.currentTimeMillis();
167            mAct.scanResultAvailable = false;
168            assertTrue("start scan failed", mAct.mWifiManager.startScanActive());
169            while (true) {
170                if ((System.currentTimeMillis() - startTime) >
171                ConnectivityManagerTestActivity.WIFI_SCAN_TIMEOUT) {
172                    fail("Wifi scanning takes more than " +
173                            ConnectivityManagerTestActivity.WIFI_SCAN_TIMEOUT + " ms");
174                }
175                synchronized(mAct) {
176                    try {
177                        mAct.wait(ConnectivityManagerTestActivity.WAIT_FOR_SCAN_RESULT);
178                    } catch (InterruptedException e) {
179                        e.printStackTrace();
180                    }
181                    if (mAct.scanResultAvailable) {
182                        long scanTime = (System.currentTimeMillis() - startTime);
183                        scanTimeSum += scanTime;
184                        break;
185                    }
186                }
187            }
188            if ((mAct.mWifiManager.getScanResults() == null) ||
189                    (mAct.mWifiManager.getScanResults().size() <= 0)) {
190                fail("Scan results are empty ");
191            }
192
193            List<ScanResult> netList = mAct.mWifiManager.getScanResults();
194            if (netList != null) {
195                log("size of scan result list: " + netList.size());
196                for (int s = 0; s < netList.size(); s++) {
197                    ScanResult sr= netList.get(s);
198                    log(String.format("scan result for %s is: %s", sr.SSID, sr.toString()));
199                    log(String.format("signal level for %s is %d ", sr.SSID, sr.level));
200                    if (sr.SSID.equals(mSsid)) {
201                        ssidAppearInScanResultsCount += 1;
202                        log("Number of times " + mSsid + " appear in the scan list: " +
203                                ssidAppearInScanResultsCount);
204                        break;
205                    }
206                }
207            }
208        }
209        if (i == mScanIterations) {
210            writeOutput(String.format("iteration %d out of %d",
211                    i, mScanIterations));
212            writeOutput(String.format("average scanning time is %d", scanTimeSum/mScanIterations));
213            writeOutput(String.format("ssid appear %d out of %d scan iterations",
214                    ssidAppearInScanResultsCount, mScanIterations));
215        }
216    }
217
218    // Stress Wifi reconnection to secure net after sleep
219    @LargeTest
220    public void testWifiReconnectionAfterSleep() {
221        int value = Settings.System.getInt(mRunner.getContext().getContentResolver(),
222                Settings.System.WIFI_SLEEP_POLICY, -1);
223        if (value < 0) {
224            Settings.System.putInt(mRunner.getContext().getContentResolver(),
225                    Settings.System.WIFI_SLEEP_POLICY, Settings.System.WIFI_SLEEP_POLICY_DEFAULT);
226            log("set wifi sleep policy to default value");
227        }
228        Settings.Secure.putLong(mRunner.getContext().getContentResolver(),
229                Settings.Secure.WIFI_IDLE_MS, WIFI_IDLE_MS);
230
231        // Connect to a Wi-Fi network
232        WifiConfiguration config = new WifiConfiguration();
233        config.SSID = mSsid;
234        config.allowedKeyManagement.set(KeyMgmt.WPA_PSK);
235        if (mPassword.matches("[0-9A-Fa-f]{64}")) {
236            config.preSharedKey = mPassword;
237        } else {
238            config.preSharedKey = '"' + mPassword + '"';
239        }
240        config.ipAssignment = IpAssignment.DHCP;
241        config.proxySettings = ProxySettings.NONE;
242
243        assertTrue("Failed to connect to Wi-Fi network: " + mSsid,
244                mAct.connectToWifiWithConfiguration(config));
245        assertTrue(mAct.waitForWifiState(WifiManager.WIFI_STATE_ENABLED,
246                ConnectivityManagerTestActivity.SHORT_TIMEOUT));
247        assertTrue(mAct.waitForNetworkState(ConnectivityManager.TYPE_WIFI, State.CONNECTED,
248                ConnectivityManagerTestActivity.LONG_TIMEOUT));
249        // Run ping test to verify the data connection
250        assertTrue("Wi-Fi is connected, but no data connection.", mAct.pingTest(null));
251
252        int i;
253        long sum = 0;
254        for (i = 0; i < mReconnectIterations; i++) {
255            // 1. Put device into sleep mode
256            // 2. Wait for the device to sleep for sometime, verify wi-fi is off and mobile is on.
257            // 3. Maintain the sleep mode for some time,
258            // 4. Verify the Wi-Fi is still off, and data is on
259            // 5. Wake up the device, verify Wi-Fi is enabled and connected.
260            writeOutput(String.format("iteration %d out of %d",
261                    i, mReconnectIterations));
262            log("iteration: " + i);
263            mAct.turnScreenOff();
264            PowerManager pm =
265                (PowerManager)mRunner.getContext().getSystemService(Context.POWER_SERVICE);
266            assertFalse(pm.isScreenOn());
267            sleep(WIFI_IDLE_MS + WIFI_SHUTDOWN_DELAY, "Interruped while wait for wifi to be idle");
268            assertTrue("Wait for Wi-Fi to idle timeout",
269                    mAct.waitForNetworkState(ConnectivityManager.TYPE_WIFI, State.DISCONNECTED,
270                    6 * ConnectivityManagerTestActivity.SHORT_TIMEOUT));
271            if (!mWifiOnlyFlag) {
272                // use long timeout as the pppd startup may take several retries.
273                assertTrue("Wait for cellular connection timeout",
274                        mAct.waitForNetworkState(ConnectivityManager.TYPE_MOBILE, State.CONNECTED,
275                        2 * ConnectivityManagerTestActivity.LONG_TIMEOUT));
276            }
277            sleep(mWifiSleepTime, "Interrupted while device is in sleep mode");
278            // Verify the wi-fi is still off and data connection is on
279            assertEquals("Wi-Fi is reconnected", State.DISCONNECTED,
280                    mAct.mCM.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState());
281
282            if (!mWifiOnlyFlag) {
283                assertEquals("Cellular connection is down", State.CONNECTED,
284                             mAct.mCM.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState());
285                assertTrue("Mobile is connected, but no data connection.", mAct.pingTest(null));
286            }
287
288            // Turn screen on again
289            mAct.turnScreenOn();
290            // Measure the time for Wi-Fi to get connected
291            long startTime = System.currentTimeMillis();
292            assertTrue("Wait for Wi-Fi enable timeout after wake up",
293                    mAct.waitForWifiState(WifiManager.WIFI_STATE_ENABLED,
294                    ConnectivityManagerTestActivity.SHORT_TIMEOUT));
295            assertTrue("Wait for Wi-Fi connection timeout after wake up",
296                    mAct.waitForNetworkState(ConnectivityManager.TYPE_WIFI, State.CONNECTED,
297                    6 * ConnectivityManagerTestActivity.LONG_TIMEOUT));
298            long connectionTime = System.currentTimeMillis() - startTime;
299            sum += connectionTime;
300            log("average reconnection time is: " + sum/(i+1));
301
302            assertTrue("Reconnect to Wi-Fi network, but no data connection.", mAct.pingTest(null));
303        }
304        if (i == mReconnectIterations) {
305            writeOutput(String.format("iteration %d out of %d",
306                    i, mReconnectIterations));
307        }
308    }
309}
310