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/*
* Copyright 2018, OpenCensus Authors
*
* 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 io.opencensus.common;
import static com.google.common.truth.Truth.assertThat;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link ServerStatsEncoding}. */
@RunWith(JUnit4.class)
public class ServerStatsEncodingTest {
@Rule public final ExpectedException thrown = ExpectedException.none();
@Test
public void encodeDecodeTest() throws ServerStatsDeserializationException {
ServerStats serverStatsToBeEncoded = null;
ServerStats serverStatsDecoded = null;
byte[] serialized = null;
serverStatsToBeEncoded = ServerStats.create(31, 22, (byte) 1);
serialized = ServerStatsEncoding.toBytes(serverStatsToBeEncoded);
serverStatsDecoded = ServerStatsEncoding.parseBytes(serialized);
assertThat(serverStatsDecoded).isEqualTo(serverStatsToBeEncoded);
serverStatsToBeEncoded = ServerStats.create(0, 22, (byte) 0);
serialized = ServerStatsEncoding.toBytes(serverStatsToBeEncoded);
serverStatsDecoded = ServerStatsEncoding.parseBytes(serialized);
assertThat(serverStatsDecoded).isEqualTo(serverStatsToBeEncoded);
serverStatsToBeEncoded = ServerStats.create(450, 0, (byte) 0);
serialized = ServerStatsEncoding.toBytes(serverStatsToBeEncoded);
serverStatsDecoded = ServerStatsEncoding.parseBytes(serialized);
assertThat(serverStatsDecoded).isEqualTo(serverStatsToBeEncoded);
}
@Test
public void skipUnknownFieldTest() throws ServerStatsDeserializationException {
ServerStats serverStatsToBeEncoded = null;
ServerStats serverStatsDecoded = null;
byte[] serialized = null;
serverStatsToBeEncoded = ServerStats.create(31, 22, (byte) 1);
serialized = ServerStatsEncoding.toBytes(serverStatsToBeEncoded);
// Add new field at the end.
byte[] serializedExpanded = new byte[serialized.length + 9];
System.arraycopy(serialized, 0, serializedExpanded, 0, serialized.length);
final ByteBuffer bb = ByteBuffer.wrap(serializedExpanded);
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.position(serialized.length);
bb.put((byte) 255);
bb.putLong(0L);
byte[] newSerialized = bb.array();
serverStatsDecoded = ServerStatsEncoding.parseBytes(newSerialized);
assertThat(serverStatsDecoded).isEqualTo(serverStatsToBeEncoded);
}
@Test
public void negativeLbLatencyValueTest() throws ServerStatsDeserializationException {
ServerStats serverStatsToBeEncoded = null;
ServerStats serverStatsDecoded = null;
byte[] serialized = null;
serverStatsToBeEncoded = ServerStats.create(31, 22, (byte) 1);
serialized = ServerStatsEncoding.toBytes(serverStatsToBeEncoded);
// update serialized byte[] with negative value for lbLatency.
final ByteBuffer bb = ByteBuffer.wrap(serialized);
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.position(2);
bb.putLong(-100L);
byte[] newSerialized = bb.array();
thrown.expect(ServerStatsDeserializationException.class);
thrown.expectMessage("Serialized ServiceStats contains invalid values");
ServerStatsEncoding.parseBytes(newSerialized);
}
@Test
public void negativeServerLatencyValueTest() throws ServerStatsDeserializationException {
ServerStats serverStatsToBeEncoded = null;
ServerStats serverStatsDecoded = null;
byte[] serialized = null;
serverStatsToBeEncoded = ServerStats.create(31, 22, (byte) 1);
serialized = ServerStatsEncoding.toBytes(serverStatsToBeEncoded);
// update serialized byte[] with negative value for serviceLatency.
final ByteBuffer bb = ByteBuffer.wrap(serialized);
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.position(11);
bb.putLong(-101L);
byte[] newSerialized = bb.array();
thrown.expect(ServerStatsDeserializationException.class);
thrown.expectMessage("Serialized ServiceStats contains invalid values");
ServerStatsEncoding.parseBytes(newSerialized);
}
@Test
public void emptySerializedBuffer() throws ServerStatsDeserializationException {
final ByteBuffer bb = ByteBuffer.allocate(0);
bb.order(ByteOrder.LITTLE_ENDIAN);
byte[] newSerialized = bb.array();
thrown.expect(ServerStatsDeserializationException.class);
thrown.expectMessage("Serialized ServerStats buffer is empty");
ServerStatsEncoding.parseBytes(newSerialized);
}
@Test
public void invalidNegativeVersion() throws ServerStatsDeserializationException {
final ByteBuffer bb = ByteBuffer.allocate(10);
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.put((byte) -1);
byte[] newSerialized = bb.array();
thrown.expect(ServerStatsDeserializationException.class);
thrown.expectMessage("Invalid ServerStats version: -1");
ServerStatsEncoding.parseBytes(newSerialized);
}
@Test
public void invalidCompatibleVersion() throws ServerStatsDeserializationException {
final ByteBuffer bb = ByteBuffer.allocate(10);
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.put((byte) (ServerStatsEncoding.CURRENT_VERSION + 1));
byte[] newSerialized = bb.array();
thrown.expect(ServerStatsDeserializationException.class);
thrown.expectMessage(
"Invalid ServerStats version: " + (ServerStatsEncoding.CURRENT_VERSION + 1));
ServerStatsEncoding.parseBytes(newSerialized);
}
}
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