A test of ReflectionTestUtils

Author: will8ug

src/main/java/me/will/springboot3ut/components/PropertySourceResolver.java

@@ -11,11 +11,17 @@ public class PropertySourceResolver {
     @Value("${components.secondProperty}")
     private String secondProperty;
 
+    private String thirdProperty = "DefaultValue";
+
     public String getFirstProperty() {
         return firstProperty;
     }
 
     public String getSecondProperty() {
         return secondProperty;
     }
+
+    public String getThirdProperty() {
+        return thirdProperty;
+    }
 }

src/test/java/me/will/springboot3ut/components/PropertySourceResolverReflectionUtilTest.java

@@ -0,0 +1,20 @@
+package me.will.springboot3ut.components;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@SpringBootTest
+public class PropertySourceResolverReflectionUtilTest {
+    @Autowired
+    private PropertySourceResolver propertySourceResolver;
+
+    @Test
+    public void testProperties_ShouldInjectedByReflectionUtils() {
+        ReflectionTestUtils.setField(propertySourceResolver, "thirdProperty", "OverriddenByReflectionUtils");
+        assertEquals("OverriddenByReflectionUtils", propertySourceResolver.getThirdProperty());
+    }
+}