1 package com.google.inject; 2 3 import static com.google.inject.Asserts.assertContains; 4 5 import com.google.inject.name.Names; 6 import java.util.logging.Logger; 7 import junit.framework.TestCase; 8 9 /** 10 * Test built-in injection of loggers. 11 * 12 * @author jessewilson 13 */ 14 public class LoggerInjectionTest extends TestCase { 15 16 @Inject Logger logger; 17 testLoggerWithMember()18 public void testLoggerWithMember() { 19 Injector injector = Guice.createInjector(); 20 injector.injectMembers(this); 21 assertEquals("com.google.inject.LoggerInjectionTest", logger.getName()); 22 } 23 testLoggerInConstructor()24 public void testLoggerInConstructor() { 25 Injector injector = Guice.createInjector(); 26 Foo foo = injector.getInstance(Foo.class); 27 assertEquals("com.google.inject.LoggerInjectionTest$Foo", foo.logger.getName()); 28 } 29 30 private static class Foo { 31 Logger logger; 32 33 @SuppressWarnings("unused") 34 @Inject Foo(Logger logger)35 Foo(Logger logger) { 36 this.logger = logger; 37 } 38 } 39 testLoggerWithoutMember()40 public void testLoggerWithoutMember() { 41 Injector injector = Guice.createInjector(); 42 assertNull(injector.getInstance(Logger.class).getName()); 43 assertNull(injector.getProvider(Logger.class).get().getName()); 44 assertNull(injector.getBinding(Logger.class).getProvider().get().getName()); 45 assertEquals("Provider<Logger>", injector.getProvider(Logger.class).toString()); 46 } 47 testCanBindAnnotatedLogger()48 public void testCanBindAnnotatedLogger() { 49 Injector injector = 50 Guice.createInjector( 51 new AbstractModule() { 52 @Override 53 protected void configure() { 54 bind(Logger.class) 55 .annotatedWith(Names.named("anonymous")) 56 .toInstance(Logger.getAnonymousLogger()); 57 } 58 }); 59 60 assertNull(injector.getInstance(Key.get(Logger.class, Names.named("anonymous"))).getName()); 61 } 62 testCannotBindLogger()63 public void testCannotBindLogger() { 64 try { 65 Guice.createInjector( 66 new AbstractModule() { 67 @Override 68 protected void configure() { 69 bind(Logger.class).toInstance(Logger.getAnonymousLogger()); 70 } 71 }); 72 fail(); 73 } catch (CreationException expected) { 74 assertContains( 75 expected.getMessage(), "A binding to java.util.logging.Logger was already configured"); 76 } 77 } 78 } 79