Ensure bean post processors are applied before injector is created

In this way, Guice modules can declare bindings asEagerSingleton()

src/test/java/org/springframework/guice/BeanPostProcessorTest.java

@@ -0,0 +1,112 @@
+package org.springframework.guice;
+
+import static org.junit.Assert.assertTrue;
+
+import javax.inject.Inject;
+
+import org.junit.Test;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.guice.BeanPostProcessorTest.GuiceBeanThatWantsPostProcessedBean;
+import org.springframework.guice.BeanPostProcessorTest.GuiceBeanThatWantsSpringBean;
+import org.springframework.guice.BeanPostProcessorTest.PostProcessedBean;
+import org.springframework.guice.BeanPostProcessorTest.SpringBeanThatWantsPostProcessedBean;
+import org.springframework.guice.annotation.EnableGuiceModules;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.Module;
+
+public class BeanPostProcessorTest {
+
+	/**
+	 * Verify BeanPostProcessor's such as Spring Boot's
+	 * ConfigurationPropertiesBindingPostProcessor are applied.
+	 */
+	@Test
+	public void testBeanPostProcessorsApplied() {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(BeanPostProcessorTestConfig.class);
+		PostProcessedBean postProcessedBean = context.getBean(PostProcessedBean.class);
+		assertTrue(postProcessedBean.postProcessed);
+		GuiceBeanThatWantsPostProcessedBean guiceBean1 = context.getBean(GuiceBeanThatWantsPostProcessedBean.class);
+		assertTrue(guiceBean1.ppb.postProcessed);
+		GuiceBeanThatWantsSpringBean guiceBean2 = context.getBean(GuiceBeanThatWantsSpringBean.class);
+		assertTrue(guiceBean2.springBean.ppb.postProcessed);
+		context.close();
+	}
+	
+	public static class PostProcessedBean {
+		Boolean postProcessed = false;
+	}
+
+	public static class SpringBeanThatWantsPostProcessedBean {
+		PostProcessedBean ppb;
+		public SpringBeanThatWantsPostProcessedBean(PostProcessedBean ppb) {
+			this.ppb = ppb;
+		}
+	}
+
+	public static class GuiceBeanThatWantsPostProcessedBean {
+		PostProcessedBean ppb;
+		@Inject
+		public GuiceBeanThatWantsPostProcessedBean(PostProcessedBean ppb) {
+			this.ppb = ppb;
+		}
+	}
+
+	public static class GuiceBeanThatWantsSpringBean {
+		SpringBeanThatWantsPostProcessedBean springBean;
+		@Inject
+		public GuiceBeanThatWantsSpringBean(SpringBeanThatWantsPostProcessedBean springBean) {
+			this.springBean = springBean;
+		}
+	}
+}
+
+
+@EnableGuiceModules
+@Configuration
+class BeanPostProcessorTestConfig {
+	@Bean
+	public BeanPostProcessor postProcessor() {
+		return new BeanPostProcessor() {
+			@Override
+			public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
+				if(bean instanceof PostProcessedBean) {
+					((PostProcessedBean)bean).postProcessed = true;
+				}
+				return bean;
+			}
+			
+			@Override
+			public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
+				return bean;
+			}
+		};
+	}
+	
+	@Bean
+	public PostProcessedBean postProcessedBean() {
+		return new PostProcessedBean();
+	}
+	
+	@Bean
+	public SpringBeanThatWantsPostProcessedBean springBean(PostProcessedBean ppb) {
+		return new SpringBeanThatWantsPostProcessedBean(ppb);
+	}
+	
+	@Bean
+	public Module someGuiceModule() {
+		return new AbstractModule() {
+			
+			@Override
+			protected void configure() {
+				binder().requireExplicitBindings();
+				bind(GuiceBeanThatWantsPostProcessedBean.class).asEagerSingleton();
+				bind(GuiceBeanThatWantsSpringBean.class).asEagerSingleton();
+			}
+		};
+	}
+}

src/test/java/org/springframework/guice/annotation/EnableGuiceModulesTests.java

@@ -14,6 +14,7 @@
 package org.springframework.guice.annotation;
 
 import javax.inject.Inject;
+import javax.inject.Named;
 
 import com.google.inject.AbstractModule;
 import com.google.inject.Injector;
@@ -68,10 +69,9 @@ public class EnableGuiceModulesTests {
 	public static class Foo {
 
 		@Inject
-		public Foo(Service service) {
+		public Foo(@Named("service") Service service) {
 			service.toString();
 		}
-
 	}
 
 	@Configuration