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/*
* Copyright (C) 2019 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.ike.ikev2.utils;
import static com.android.ike.ikev2.IkeSessionStateMachine.CMD_RETRANSMIT;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyObject;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;
import android.os.Handler;
import android.os.Message;
import com.android.ike.ikev2.message.IkeMessage;
import org.junit.Before;
import org.junit.Test;
public final class RetransmitterTest {
private Handler mMockHandler;
private IkeMessage mMockIkeMessage;
private TestRetransmitter mRetransmitter;
private class TestRetransmitter extends Retransmitter {
int mSendCallCount; // Defaults to 0
boolean mFailed; // Defaults to false
TestRetransmitter(Handler handler, IkeMessage message) {
super(handler, message);
}
@Override
public void send(IkeMessage msg) {
mSendCallCount++;
}
@Override
public void handleRetransmissionFailure() {
mFailed = true;
}
}
@Before
public void setUp() throws Exception {
mMockHandler = mock(Handler.class);
when(mMockHandler.obtainMessage(eq(CMD_RETRANSMIT), anyObject()))
.thenReturn(mock(Message.class));
mMockIkeMessage = mock(IkeMessage.class);
mRetransmitter = new TestRetransmitter(mMockHandler, mMockIkeMessage);
}
@Test
public void testSendRequestAndQueueRetransmit() throws Exception {
mRetransmitter.retransmit();
assertEquals(1, mRetransmitter.mSendCallCount);
verify(mMockHandler).obtainMessage(eq(CMD_RETRANSMIT), eq(mRetransmitter));
verify(mMockHandler)
.sendMessageDelayed(any(Message.class), eq(Retransmitter.RETRANSMIT_TIMEOUT_MS));
}
@Test
public void testRetransmitQueuesExponentialRetransmit() throws Exception {
mRetransmitter.retransmit();
for (int i = 0; i <= Retransmitter.RETRANSMIT_MAX_ATTEMPTS; i++) {
long expectedTimeout =
(long)
(Retransmitter.RETRANSMIT_TIMEOUT_MS
* Math.pow(Retransmitter.RETRANSMIT_BACKOFF_FACTOR, i));
assertEquals(i + 1, mRetransmitter.mSendCallCount);
assertFalse(mRetransmitter.mFailed);
// This call happens with the same arguments each time
verify(mMockHandler, times(i + 1))
.obtainMessage(eq(CMD_RETRANSMIT), eq(mRetransmitter));
// But the expected timeout changes every time
verify(mMockHandler).sendMessageDelayed(any(Message.class), eq(expectedTimeout));
verifyNoMoreInteractions(mMockHandler);
// Trigger next round of retransmissions.
mRetransmitter.retransmit();
}
}
@Test
public void testRetransmitterCallsRetranmissionsFailedOnMaxTries() throws Exception {
mRetransmitter.retransmit();
// Exhaust all retransmit attempts
for (int i = 0; i <= Retransmitter.RETRANSMIT_MAX_ATTEMPTS; i++) {
mRetransmitter.retransmit();
}
assertTrue(mRetransmitter.mFailed);
}
@Test
public void testRetransmitterStopsRetransmitting() throws Exception {
mRetransmitter.stopRetransmitting();
verify(mMockHandler).removeMessages(eq(CMD_RETRANSMIT), eq(mRetransmitter));
}
}
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