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package com.google.inject;
import static com.google.inject.Asserts.assertContains;
import com.google.inject.name.Names;
import java.util.logging.Logger;
import junit.framework.TestCase;
/**
* Test built-in injection of loggers.
*
* @author jessewilson
*/
public class LoggerInjectionTest extends TestCase {
@Inject Logger logger;
public void testLoggerWithMember() {
Injector injector = Guice.createInjector();
injector.injectMembers(this);
assertEquals("com.google.inject.LoggerInjectionTest", logger.getName());
}
public void testLoggerInConstructor() {
Injector injector = Guice.createInjector();
Foo foo = injector.getInstance(Foo.class);
assertEquals("com.google.inject.LoggerInjectionTest$Foo", foo.logger.getName());
}
private static class Foo {
Logger logger;
@SuppressWarnings("unused")
@Inject
Foo(Logger logger) {
this.logger = logger;
}
}
public void testLoggerWithoutMember() {
Injector injector = Guice.createInjector();
assertNull(injector.getInstance(Logger.class).getName());
assertNull(injector.getProvider(Logger.class).get().getName());
assertNull(injector.getBinding(Logger.class).getProvider().get().getName());
assertEquals("Provider<Logger>", injector.getProvider(Logger.class).toString());
}
public void testCanBindAnnotatedLogger() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Logger.class)
.annotatedWith(Names.named("anonymous"))
.toInstance(Logger.getAnonymousLogger());
}
});
assertNull(injector.getInstance(Key.get(Logger.class, Names.named("anonymous"))).getName());
}
public void testCannotBindLogger() {
try {
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Logger.class).toInstance(Logger.getAnonymousLogger());
}
});
fail();
} catch (CreationException expected) {
assertContains(expected.getMessage(), "Logger was bound multiple times.");
}
}
}
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