Add test for set binding autowire

Fixes #65

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

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.guice;
+
+import javax.inject.Inject;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.Module;
+import com.google.inject.multibindings.Multibinder;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.guice.annotation.EnableGuiceModules;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class SetBindingTests {
+
+	@Inject
+	private Benz bar;
+
+	@Test
+	public void testNativeGuiceBinding() {
+		Injector app = Guice.createInjector(new AutomobileModule());
+		SetBindingTests instance = app.getInstance(SetBindingTests.class);
+		assertThat(instance.bar).isNotNull();
+	}
+
+	@Test
+	void testSpringBinding() {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		context.register(SpringGuiceConfig.class);
+		context.refresh();
+		Benz car = context.getBean(SpringGuiceConfig.class).getBenz();
+		assertThat(car).isNotNull();
+		assertThat(car.getModel()).contains("220");
+		context.close();
+	}
+
+	@Configuration
+	@EnableGuiceModules
+	public static class SpringGuiceConfig {
+
+		@Autowired
+		private Benz benz;
+
+		public Benz getBenz() {
+			return this.benz;
+		}
+
+		@Bean
+		public static Module module() {
+			return new AutomobileModule();
+		}
+
+	}
+
+	interface Car {
+
+		String getModel();
+
+	}
+
+	static class Audi implements Car {
+
+		@Override
+		public String getModel() {
+			return "Audi A4";
+		}
+
+	}
+
+	static class Benz implements Car {
+
+		@Override
+		public String getModel() {
+			return "C 220";
+		}
+
+	}
+
+	static class AutomobileModule extends AbstractModule {
+
+		@Override
+		protected void configure() {
+			Multibinder<Car> uriBinder = Multibinder.newSetBinder(binder(), Car.class);
+			uriBinder.addBinding().to(Audi.class);
+			uriBinder.addBinding().to(Benz.class);
+		}
+
+	}
+
+}