spring core aop : pointcut - within, args

spring-core/aop/src/test/java/com/example/aop/pointcut/ArgsTest.java

@@ -0,0 +1,68 @@
+package com.example.aop.pointcut;
+
+import com.example.aop.member.MemberServiceImpl;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.aop.aspectj.AspectJExpressionPointcut;
+
+import java.lang.reflect.Method;
+
+import static org.assertj.core.api.Assertions.*;
+
+public class ArgsTest {
+
+    Method helloMethod;
+
+    @BeforeEach
+    public void init() throws NoSuchMethodException {
+        helloMethod = MemberServiceImpl.class.getMethod("hello", String.class);
+    }
+
+    private AspectJExpressionPointcut pointcut(String expression) {
+        AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
+        pointcut.setExpression(expression);
+        return pointcut;
+    }
+
+    @Test
+    void args() {
+        // hello(String)과 매칭
+        assertThat(pointcut("args(String)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+        assertThat(pointcut("args(Object)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+        assertThat(pointcut("args()")
+                .matches(helloMethod, MemberServiceImpl.class)).isFalse();
+        assertThat(pointcut("args(..)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+        assertThat(pointcut("args(*)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+        assertThat(pointcut("args(String, ..)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+
+    }
+
+    /**
+     * execution(* *(java.io.Serializable)): 메서드의 시그니처로 판단 (정적)
+     * args(java.io.Serializable): 런타임에 전달된 인수로 판단 (동적)
+     */
+    @Test
+    void argsVsExecution() {
+        // Args
+        assertThat(pointcut("args(String)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+        assertThat(pointcut("args(java.io.Serializable)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+        assertThat(pointcut("args(Object)")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+
+        // Execution
+        assertThat(pointcut("execution(* *(String))")
+                .matches(helloMethod, MemberServiceImpl.class)).isTrue();
+        assertThat(pointcut("execution(* *(java.io.Serializable))")
+                .matches(helloMethod, MemberServiceImpl.class)).isFalse();
+        assertThat(pointcut("execution(* *(Object))")
+                .matches(helloMethod, MemberServiceImpl.class)).isFalse();
+    }
+}

spring-core/aop/src/test/java/com/example/aop/pointcut/WithinTest.java

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+package com.example.aop.pointcut;
+
+import com.example.aop.member.MemberServiceImpl;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.aop.aspectj.AspectJExpressionPointcut;
+
+import java.lang.reflect.Method;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class WithinTest {
+
+    AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
+    Method helloMethod;
+
+    @BeforeEach
+    public void init() throws NoSuchMethodException {
+        helloMethod = MemberServiceImpl.class.getMethod("hello", String.class);
+    }
+
+    @Test
+    void withinMatch() {
+        pointcut.setExpression("within(com.example.aop.member.MemberServiceImpl)");
+
+        assertThat(pointcut.matches(helloMethod, MemberServiceImpl.class)).isTrue();
+    }
+
+    @Test
+    void withinStar() {
+        pointcut.setExpression("within(com.example.aop.member.*Service*)");
+
+        assertThat(pointcut.matches(helloMethod, MemberServiceImpl.class)).isTrue();
+    }
+
+    @Test
+    void withinSubPackage() {
+        pointcut.setExpression("within(com.example.aop..*)");
+
+        assertThat(pointcut.matches(helloMethod, MemberServiceImpl.class)).isTrue();
+    }
+
+    @Test
+    @DisplayName("타겟의 타입에만 직접 적용, 인터페이스 선정 불가능")
+    void withinSuperTypeFalse() {
+        pointcut.setExpression("within(com.example.aop.member.MemberService)");
+
+        assertThat(pointcut.matches(helloMethod, MemberServiceImpl.class)).isFalse();
+    }
+
+    @Test
+    @DisplayName("execution 은 타입 기반, 인터페이스를 선정 가능")
+    void withinSuperTypeTrue() {
+        pointcut.setExpression("execution(* com.example.aop.member.MemberService.*(..))");
+
+        assertThat(pointcut.matches(helloMethod, MemberServiceImpl.class)).isTrue();
+    }
+}