Add ExitNodeProcess and unit tests

This commit is contained in:
David Alves
2025-11-05 11:54:34 +00:00
parent 3b4f968a59
commit 0960a7a141
2 changed files with 709 additions and 0 deletions

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package sd;
import java.io.IOException;
import java.net.Socket;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.junit.jupiter.api.AfterEach;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.Timeout;
import org.junit.jupiter.api.io.TempDir;
import sd.config.SimulationConfig;
/**
* Testes unitários para a classe ExitNodeProcess.
*
* Esta classe de testes verifica:
* - Construção e inicialização do processo
* - Criação e aceitação de conexões do servidor socket
* - Gestão do ciclo de vida (start/shutdown)
* - Processamento concorrente de múltiplas conexões
* - Impressão de estatísticas finais
*
* Os testes utilizam configurações temporárias e portas dedicadas (19001)
* para evitar conflitos com outros testes ou processos em execução.
*/
public class ExitNodeProcessTest {
@TempDir
Path tempDir;
private Path configFile;
private ExitNodeProcess exitNodeProcess;
private Thread exitNodeThread;
/**
* Configura o ambiente de teste antes de cada teste.
* Cria um ficheiro de configuração temporário com as definições necessárias.
*/
@BeforeEach
public void setUp() throws IOException {
configFile = tempDir.resolve("test-simulation.properties");
String configContent = """
# Test Exit Node Configuration
# Exit Configuration
exit.host=localhost
exit.port=19001
# Dashboard Configuration (will not be running in tests)
dashboard.host=localhost
dashboard.port=19000
# Vehicle Crossing Times
vehicle.bike.crossingTime=2.0
vehicle.light.crossingTime=3.0
vehicle.heavy.crossingTime=5.0
# Simulation Duration
simulation.duration=60.0
""";
Files.writeString(configFile, configContent);
}
/**
* Limpa os recursos após cada teste.
* Garante que o processo e threads são terminados corretamente.
*/
@AfterEach
public void tearDown() {
if (exitNodeProcess != null) {
exitNodeProcess.shutdown();
}
if (exitNodeThread != null && exitNodeThread.isAlive()) {
exitNodeThread.interrupt();
try {
exitNodeThread.join(1000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}
/**
* Testa a construção bem-sucedida do ExitNodeProcess com configuração válida.
*/
@Test
public void testConstructor_Success() throws IOException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
assertNotNull(exitNodeProcess);
}
/**
* Testa que uma exceção é lançada quando a configuração é inválida.
*/
@Test
public void testConstructor_InvalidConfig() {
Exception exception = assertThrows(IOException.class, () -> {
new SimulationConfig("non-existent-config.properties");
});
assertNotNull(exception);
}
/**
* Testa a inicialização sem dashboard disponível.
* Verifica que o processo continua a funcionar mesmo sem conexão ao dashboard.
*/
@Test
public void testInitialize_WithoutDashboard() throws IOException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
assertDoesNotThrow(() -> exitNodeProcess.initialize());
}
/**
* Testa que o servidor socket é criado corretamente na porta configurada.
* Verifica que é possível estabelecer uma conexão ao socket do servidor.
*/
@Test
@Timeout(value = 3, unit = TimeUnit.SECONDS)
public void testStart_ServerSocketCreated() throws IOException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
exitNodeProcess.initialize();
CountDownLatch latch = new CountDownLatch(1);
exitNodeThread = new Thread(() -> {
try {
latch.countDown();
exitNodeProcess.start();
} catch (IOException e) {
// expected when shutdown
}
});
exitNodeThread.start();
try {
assertTrue(latch.await(2, TimeUnit.SECONDS), "Exit node should start within timeout");
Thread.sleep(100);
assertDoesNotThrow(() -> {
try (Socket testSocket = new Socket("localhost", 19001)) {
assertTrue(testSocket.isConnected());
}
});
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
/**
* Testa que o servidor aceita conexões de clientes.
*/
@Test
@Timeout(value = 3, unit = TimeUnit.SECONDS)
public void testStart_AcceptsConnection() throws IOException, InterruptedException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
exitNodeProcess.initialize();
CountDownLatch latch = new CountDownLatch(1);
exitNodeThread = new Thread(() -> {
try {
latch.countDown();
exitNodeProcess.start();
} catch (IOException e) {
// expected
}
});
exitNodeThread.start();
assertTrue(latch.await(2, TimeUnit.SECONDS));
Thread.sleep(200);
assertDoesNotThrow(() -> {
try (Socket socket = new Socket("localhost", 19001)) {
assertTrue(socket.isConnected());
}
});
}
/**
* Testa múltiplas inicializações e encerramentos do processo.
* Verifica que o processo pode ser iniciado e parado múltiplas vezes,
* permitindo reutilização da porta.
*/
@Test
@Timeout(value = 3, unit = TimeUnit.SECONDS)
public void testMultipleStartStop() throws IOException, InterruptedException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
exitNodeProcess.initialize();
CountDownLatch latch = new CountDownLatch(1);
exitNodeThread = new Thread(() -> {
try {
latch.countDown();
exitNodeProcess.start();
} catch (IOException e) {
// expected
}
});
exitNodeThread.start();
assertTrue(latch.await(2, TimeUnit.SECONDS));
Thread.sleep(100);
exitNodeProcess.shutdown();
Thread.sleep(100);
assertDoesNotThrow(() -> {
SimulationConfig config2 = new SimulationConfig(configFile.toString());
ExitNodeProcess exitNode2 = new ExitNodeProcess(config2);
exitNode2.initialize();
exitNode2.shutdown();
});
}
/**
* Testa que o shutdown fecha corretamente o servidor socket.
* Após o shutdown, novas conexões ao socket devem falhar.
*/
@Test
@Timeout(value = 3, unit = TimeUnit.SECONDS)
public void testShutdown_ClosesServerSocket() throws IOException, InterruptedException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
exitNodeProcess.initialize();
CountDownLatch startLatch = new CountDownLatch(1);
exitNodeThread = new Thread(() -> {
try {
startLatch.countDown();
exitNodeProcess.start();
} catch (IOException e) {
// expected
}
});
exitNodeThread.start();
assertTrue(startLatch.await(2, TimeUnit.SECONDS));
Thread.sleep(200);
exitNodeProcess.shutdown();
Thread.sleep(200);
assertThrows(IOException.class, () -> {
Socket socket = new Socket("localhost", 19001);
socket.close();
});
}
/**
* Testa que as estatísticas finais são impressas corretamente durante o shutdown.
* Verifica que o método não lança exceções mesmo sem dados processados.
*/
@Test
public void testPrintFinalStatistics() throws IOException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
exitNodeProcess.initialize();
assertDoesNotThrow(() -> exitNodeProcess.shutdown());
}
/**
* Testa o processamento de múltiplas conexões concorrentes.
* Verifica que o servidor consegue lidar com vários clientes simultaneamente
* usando o pool de threads.
*/
@Test
@Timeout(value = 3, unit = TimeUnit.SECONDS)
public void testMultipleConcurrentConnections() throws IOException, InterruptedException {
SimulationConfig config = new SimulationConfig(configFile.toString());
exitNodeProcess = new ExitNodeProcess(config);
exitNodeProcess.initialize();
CountDownLatch latch = new CountDownLatch(1);
exitNodeThread = new Thread(() -> {
try {
latch.countDown();
exitNodeProcess.start();
} catch (IOException e) {
// expected
}
});
exitNodeThread.start();
assertTrue(latch.await(2, TimeUnit.SECONDS));
Thread.sleep(200);
Thread[] clients = new Thread[3];
for (int i = 0; i < 3; i++) {
clients[i] = new Thread(() -> {
try (Socket socket = new Socket("localhost", 19001)) {
assertTrue(socket.isConnected());
Thread.sleep(100);
} catch (IOException | InterruptedException e) {
// ignore
}
});
clients[i].start();
}
for (Thread client : clients) {
client.join(1000);
}
}
}