添加 junit4 单元测试

pom.xml

@@ -103,6 +103,11 @@
             <artifactId>FastInfoset</artifactId>
             <version>1.2.18</version>
         </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <repositories>

src/main/resources/application.yml

@@ -3,9 +3,9 @@ server:
 spring:
   datasource:
     driver-class-name: com.mysql.cj.jdbc.Driver
-    url: jdbc:mysql://localhost:3306/electronic_mall?serverTimezone=GMT%2b8&userSSL=false&allowPublicKeyRetrieval=true
-    username: root
-    password: 'root'
+    url: jdbc:mysql://139.196.201.231:3306/mall?serverTimezone=GMT%2b8&userSSL=false&allowPublicKeyRetrieval=true
+    username: "myuser"
+    password: 'Fzhang5.'
   servlet:
     multipart:
       max-file-size: 30MB

src/test/java/com/rabbiter/em/mapper/CartMapperTest.java

@@ -0,0 +1,32 @@
+package com.rabbiter.em.mapper;
+
+import com.rabbiter.em.entity.Cart;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.annotation.Resource;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.Assert.*;
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class CartMapperTest {
+    @Autowired
+    private CartMapper cartMapper;
+
+    @Test
+    public void selectByUserId() {
+        List<Map<String, Object>> list = cartMapper.selectByUserId(2L);
+        System.out.println(list);
+    }
+
+    @Test
+    public void selectAll() {
+        cartMapper.selectList(null).forEach(System.out::println);
+    }
+}