Add Java Bean Validation with test case

spring-web-lab/pom.xml

@@ -25,6 +25,10 @@
             <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
             <version>2.8.8</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
     </dependencies>
 
 </project>

spring-web-lab/src/main/java/pl/mperor/lab/spring/controller/HelloController.java

@@ -1,8 +1,8 @@
 package pl.mperor.lab.spring.controller;
 
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.*;
+import org.springframework.web.bind.annotation.*;
 
 @RequestMapping("/hello")
 @RestController
@@ -13,4 +13,19 @@ String hello() {
         return "🗺️ Hello World!";
     }
 
-}
+    @PostMapping("/{name}")
+    String welcomeName(@PathVariable @NotBlank String name) {
+        return "🤚 Welcome %s!".formatted(name);
+    }
+
+    @PostMapping("/user")
+    String welcomeUser(@RequestBody @Valid HelloUser user) {
+        return "🤚 Welcome 👤 %s (%s)!".formatted(user.name, user.email);
+    }
+
+    record HelloUser(@NotNull @Size(min = 3) String name,
+                     @NotNull @Email String email,
+                     @Min(0) Integer age,
+                     @Pattern(regexp = "^\\d{3}[\\s-]?\\d{3}[\\s-]?\\d{3}$") String phoneNumber) {
+    }
+}

spring-web-lab/src/main/resources/application.yml

@@ -16,4 +16,8 @@
 springdoc:
   swagger-ui:
     use-root-path: true
-    display-request-duration: true
+    display-request-duration: true
+
+server:
+  error:
+    include-binding-errors: always

spring-web-lab/src/test/java/pl/mperor/lab/spring/controller/HelloControllerTest.java

@@ -3,6 +3,7 @@
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.http.MediaType;
 import org.springframework.test.web.servlet.assertj.MockMvcTester;
 
 @WebMvcTest
@@ -19,4 +20,27 @@ void shouldReturnHelloWorld() {
                 .assertThat().hasStatusOk()
                 .bodyText().isEqualTo("🗺️ Hello World!");
     }
+
+    @Test
+    void shouldReturnWelcomeWhenNameNotBlank() {
+        tester.post()
+                .uri("/hello/{name}", "NotBlank")
+                .exchange()
+                .assertThat().hasStatusOk()
+                .bodyText().isEqualTo("🤚 Welcome NotBlank!");
+    }
+
+    @Test
+    void shouldReturn400WhenNotValidContent() {
+        tester.post()
+                .uri("/hello/user")
+                .contentType(MediaType.APPLICATION_JSON)
+                .content("""
+                        {
+                            "name": "josh",
+                            "email": "not a valid email"
+                        }""")
+                .exchange()
+                .assertThat().hasStatus4xxClientError();
+    }
 }