JAVA-19545 Move articles from spring-core-2 module to spring-di-3 module (#13708)

* JAVA-19545 Move articles from spring-core-2 module to spring-di-3 module

* JAVA-19545 Move articles from spring-core-4 module to spring-di-3 module

spring-di-3/src/test/java/com/baeldung/order/RatingRetrieverUnitTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.order;
+
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(loader = AnnotationConfigContextLoader.class)
+public class RatingRetrieverUnitTest {
+    
+    @Configuration 
+    @ComponentScan(basePackages = {"com.baeldung.order"})
+    static class ContextConfiguration {} 
+    
+    @Autowired
+    private List<Rating> ratings;
+    
+    @Test
+    public void givenOrderOnComponents_whenInjected_thenAutowireByOrderValue() {
+        assertThat(ratings.get(0).getRating(), is(equalTo(1)));
+        assertThat(ratings.get(1).getRating(), is(equalTo(2)));
+        assertThat(ratings.get(2).getRating(), is(equalTo(3)));
+    }
+
+}