/*
* Copyright (c) 2011-2015 The original author or authors
* ------------------------------------------------------
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* You may elect to redistribute this code under either of these licenses.
*/
package io.vertx.test.it;
import io.vertx.core.logging.Logger;
import io.vertx.core.logging.LoggerFactory;
import io.vertx.core.logging.SLF4JLogDelegateFactory;
import io.vertx.core.spi.logging.LogDelegate;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.slf4j.impl.SimpleLogger;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.lang.reflect.Field;
import java.util.concurrent.Callable;
import static org.junit.Assert.*;
/**
* Theses test checks the SLF4J log delegate. It assumes the binding used by SLF4J is slf4j-simple with the default
* configuration. It injects a print stream to read the logged message. This is definitely a hack, but it's the only
* way to test the output.
*
* @author <a href="http://escoffier.me">Clement Escoffier</a>
*/
public class SLF4JLogDelegateTest {
@BeforeClass
public static void initialize() throws IOException {
System.setProperty("vertx.logger-delegate-factory-class-name", SLF4JLogDelegateFactory.class.getName());
LoggerFactory.initialise();
}
@AfterClass
public static void terminate() {
System.clearProperty("vertx.logger-delegate-factory-class-name");
}
@Test
public void testDelegateUnwrap() {
Logger logger = LoggerFactory.getLogger("my-slf4j-logger");
LogDelegate delegate = logger.getDelegate();
assertNotNull("Delegate is null", delegate);
try {
org.slf4j.Logger unwrapped = (org.slf4j.Logger) delegate.unwrap();
assertNotNull("Unwrapped is null", unwrapped);
} catch (ClassCastException e) {
fail("Unexpected unwrapped type: " + e.getMessage());
}
}
@Test
public void testInfo() {
Logger logger = LoggerFactory.getLogger("my-slf4j-logger");
String result = record(() -> logger.info("hello"));
assertContains("[main] INFO my-slf4j-logger - hello", result);
result = record(() -> logger.info("exception", new NullPointerException()));
assertTrue(result.contains("[main] INFO my-slf4j-logger - exception"));
assertTrue(result.contains("java.lang.NullPointerException"));
result = record(() -> logger.info("hello {} and {}", "Paulo", "Julien"));
assertContains("[main] INFO my-slf4j-logger - hello Paulo and Julien", result);
result = record(() -> logger.info("hello {}", "vert.x"));
assertContains("[main] INFO my-slf4j-logger - hello vert.x", result);
result = record(() -> logger.info("hello {} - {}", "vert.x"));
assertContains("[main] INFO my-slf4j-logger - hello vert.x - {}", result);
result = record(() -> logger.info("hello {}", "vert.x", "foo"));
assertContains("[main] INFO my-slf4j-logger - hello vert.x", result);
result = record(() -> logger.info("{}, an exception has been thrown", new IllegalStateException(), "Luke"));
assertTrue(result.contains("[main] INFO my-slf4j-logger - Luke, an exception has been thrown"));
assertTrue(result.contains("java.lang.IllegalStateException"));
result = record(() -> logger.info("{}, an exception has been thrown", "Luke", new IllegalStateException()));
assertTrue(result.contains("[main] INFO my-slf4j-logger - Luke, an exception has been thrown"));
assertTrue(result.contains("java.lang.IllegalStateException"));
}
@Test
public void testError() {
Logger logger = LoggerFactory.getLogger("my-slf4j-logger");
String result = record(() -> logger.error("hello"));
assertContains("[main] ERROR my-slf4j-logger - hello", result);
result = record(() -> logger.error("exception", new NullPointerException()));
assertTrue(result.contains("[main] ERROR my-slf4j-logger - exception"));
assertTrue(result.contains("java.lang.NullPointerException"));
result = record(() -> logger.error("hello {} and {}", "Paulo", "Julien"));
assertContains("[main] ERROR my-slf4j-logger - hello Paulo and Julien", result);
result = record(() -> logger.error("hello {}", "vert.x"));
assertContains("[main] ERROR my-slf4j-logger - hello vert.x", result);
result = record(() -> logger.error("hello {} - {}", "vert.x"));
assertContains("[main] ERROR my-slf4j-logger - hello vert.x - {}", result);
result = record(() -> logger.error("hello {}", "vert.x", "foo"));
assertContains("[main] ERROR my-slf4j-logger - hello vert.x", result);
result = record(() -> logger.error("{}, an exception has been thrown", new IllegalStateException(), "Luke"));
assertTrue(result.contains("[main] ERROR my-slf4j-logger - Luke, an exception has been thrown"));
assertTrue(result.contains("java.lang.IllegalStateException"));
result = record(() -> logger.error("{}, an exception has been thrown", "Luke", new IllegalStateException()));
assertTrue(result.contains("[main] ERROR my-slf4j-logger - Luke, an exception has been thrown"));
assertTrue(result.contains("java.lang.IllegalStateException"));
}
private void assertContains(String expectedExcerpt, String object) {
assertNotNull(object);
assertTrue(object.contains(expectedExcerpt));
}
@Test
public void testWarning() {
Logger logger = LoggerFactory.getLogger("my-slf4j-logger");
String result = record(() -> logger.warn("hello"));
assertContains("[main] WARN my-slf4j-logger - hello", result);
result = record(() -> logger.warn("exception", new NullPointerException()));
assertTrue(result.contains("[main] WARN my-slf4j-logger - exception"));
assertTrue(result.contains("java.lang.NullPointerException"));
result = record(() -> logger.warn("hello {} and {}", "Paulo", "Julien"));
assertContains("[main] WARN my-slf4j-logger - hello Paulo and Julien", result);
result = record(() -> logger.warn("hello {}", "vert.x"));
assertContains("[main] WARN my-slf4j-logger - hello vert.x", result);
result = record(() -> logger.warn("hello {} - {}", "vert.x"));
assertContains("[main] WARN my-slf4j-logger - hello vert.x - {}", result);
result = record(() -> logger.warn("hello {}", "vert.x", "foo"));
assertContains("[main] WARN my-slf4j-logger - hello vert.x", result);
result = record(() -> logger.warn("{}, an exception has been thrown", new IllegalStateException(), "Luke"));
assertTrue(result.contains("[main] WARN my-slf4j-logger - Luke, an exception has been thrown"));
assertTrue(result.contains("java.lang.IllegalStateException"));
result = record(() -> logger.warn("{}, an exception has been thrown", "Luke", new IllegalStateException()));
assertTrue(result.contains("[main] WARN my-slf4j-logger - Luke, an exception has been thrown"));
assertTrue(result.contains("java.lang.IllegalStateException"));
}
private void setStream(PrintStream stream) {
try {
Field field = SimpleLogger.class.getDeclaredField("TARGET_STREAM");
field.setAccessible(true);
field.set(null, stream);
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
private String record(Runnable runnable) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
PrintStream written = new PrintStream(stream);
setStream(written);
runnable.run();
written.flush();
String result = stream.toString();
quiet(() -> {
written.close();
return null;
});
return result;
}
private void quiet(Callable<Void> action) {
try {
action.call();
} catch (Exception ignored) {
// Ignored.
}
}
}