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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.wifi;
import static org.mockito.Mockito.*;
import static org.mockito.MockitoAnnotations.*;
import androidx.test.filters.SmallTest;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
/**
* Unit tests for {@link com.android.server.wifi.SelfRecovery}.
*/
@SmallTest
public class SelfRecoveryTest {
SelfRecovery mSelfRecovery;
@Mock WifiController mWifiController;
@Mock Clock mClock;
@Before
public void setUp() throws Exception {
initMocks(this);
mSelfRecovery = new SelfRecovery(mWifiController, mClock);
}
/**
* Verifies that invocations of {@link SelfRecovery#trigger(int)} with valid reasons will send
* the restart message to {@link WifiController}.
*/
@Test
public void testValidTriggerReasonsSendMessageToWifiController() {
mSelfRecovery.trigger(SelfRecovery.REASON_LAST_RESORT_WATCHDOG);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI), anyInt());
reset(mWifiController);
when(mClock.getElapsedSinceBootMillis())
.thenReturn(SelfRecovery.MAX_RESTARTS_TIME_WINDOW_MILLIS + 1);
mSelfRecovery.trigger(SelfRecovery.REASON_WIFINATIVE_FAILURE);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI), anyInt());
reset(mWifiController);
}
/**
* Verifies that invocations of {@link SelfRecovery#trigger(int)} with invalid reasons will not
* send the restart message to {@link WifiController}.
*/
@Test
public void testInvalidTriggerReasonsDoesNotSendMessageToWifiController() {
mSelfRecovery.trigger(-1);
verify(mWifiController, never()).sendMessage(anyInt(), anyString());
mSelfRecovery.trigger(8);
verify(mWifiController, never()).sendMessage(anyInt(), anyString());
}
/**
* Verifies that a STA interface down event will trigger WifiController to disable wifi.
*/
@Test
public void testStaIfaceDownDisablesWifi() {
mSelfRecovery.trigger(SelfRecovery.REASON_STA_IFACE_DOWN);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_DISABLE_WIFI));
}
/**
* Verifies that invocations of {@link SelfRecovery#trigger(int)} for REASON_HAL_CRASH &
* REASON_WIFICOND_CRASH are limited to {@link SelfRecovery#MAX_RESTARTS_IN_TIME_WINDOW} in a
* {@link SelfRecovery#MAX_RESTARTS_TIME_WINDOW_MILLIS} millisecond time window.
*/
@Test
public void testTimeWindowLimiting_typicalUse() {
when(mClock.getElapsedSinceBootMillis()).thenReturn(0L);
// Fill up the SelfRecovery's restart time window buffer, ensure all the restart triggers
// aren't ignored
for (int i = 0; i < SelfRecovery.MAX_RESTARTS_IN_TIME_WINDOW / 2; i++) {
mSelfRecovery.trigger(SelfRecovery.REASON_WIFINATIVE_FAILURE);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI),
anyInt());
reset(mWifiController);
mSelfRecovery.trigger(SelfRecovery.REASON_WIFINATIVE_FAILURE);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI),
anyInt());
reset(mWifiController);
}
if ((SelfRecovery.MAX_RESTARTS_IN_TIME_WINDOW % 2) == 1) {
mSelfRecovery.trigger(SelfRecovery.REASON_WIFINATIVE_FAILURE);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI),
anyInt());
reset(mWifiController);
}
// Verify that further attempts to trigger restarts disable wifi
mSelfRecovery.trigger(SelfRecovery.REASON_WIFINATIVE_FAILURE);
verify(mWifiController, never()).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI),
anyString());
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_DISABLE_WIFI));
reset(mWifiController);
mSelfRecovery.trigger(SelfRecovery.REASON_WIFINATIVE_FAILURE);
verify(mWifiController, never()).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI),
anyString());
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_DISABLE_WIFI));
reset(mWifiController);
// Verify L.R.Watchdog can still restart things (It has its own complex limiter)
mSelfRecovery.trigger(SelfRecovery.REASON_LAST_RESORT_WATCHDOG);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI),
anyInt());
reset(mWifiController);
// Verify Sta Interface Down will still disable wifi
mSelfRecovery.trigger(SelfRecovery.REASON_STA_IFACE_DOWN);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_DISABLE_WIFI));
reset(mWifiController);
// now TRAVEL FORWARDS IN TIME and ensure that more restarts can occur
when(mClock.getElapsedSinceBootMillis())
.thenReturn(SelfRecovery.MAX_RESTARTS_TIME_WINDOW_MILLIS + 1);
mSelfRecovery.trigger(SelfRecovery.REASON_LAST_RESORT_WATCHDOG);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI), anyInt());
reset(mWifiController);
when(mClock.getElapsedSinceBootMillis())
.thenReturn(SelfRecovery.MAX_RESTARTS_TIME_WINDOW_MILLIS + 1);
mSelfRecovery.trigger(SelfRecovery.REASON_WIFINATIVE_FAILURE);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI), anyInt());
reset(mWifiController);
}
/**
* Verifies that invocations of {@link SelfRecovery#trigger(int)} for
* REASON_LAST_RESORT_WATCHDOG are NOT limited to
* {@link SelfRecovery#MAX_RESTARTS_IN_TIME_WINDOW} in a
* {@link SelfRecovery#MAX_RESTARTS_TIME_WINDOW_MILLIS} millisecond time window.
*/
@Test
public void testTimeWindowLimiting_lastResortWatchdog_noEffect() {
for (int i = 0; i < SelfRecovery.MAX_RESTARTS_IN_TIME_WINDOW * 2; i++) {
// Verify L.R.Watchdog can still restart things (It has it's own complex limiter)
mSelfRecovery.trigger(SelfRecovery.REASON_LAST_RESORT_WATCHDOG);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI),
anyInt());
reset(mWifiController);
}
}
/**
* Verifies that invocations of {@link SelfRecovery#trigger(int)} for
* REASON_STA_IFACE_DOWN are NOT limited to
* {@link SelfRecovery#MAX_RESTARTS_IN_TIME_WINDOW} in a
* {@link SelfRecovery#MAX_RESTARTS_TIME_WINDOW_MILLIS} millisecond time window.
*/
@Test
public void testTimeWindowLimiting_staIfaceDown_noEffect() {
for (int i = 0; i < SelfRecovery.MAX_RESTARTS_IN_TIME_WINDOW * 2; i++) {
mSelfRecovery.trigger(SelfRecovery.REASON_STA_IFACE_DOWN);
verify(mWifiController).sendMessage(eq(WifiController.CMD_RECOVERY_DISABLE_WIFI));
verify(mWifiController, never())
.sendMessage(eq(WifiController.CMD_RECOVERY_RESTART_WIFI), anyInt());
reset(mWifiController);
}
}
}
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