Introduction to @SpringBootTest and testing toolbox

spring-web-lab/README.md

@@ -3,4 +3,5 @@
 ## Sources 🔗
 
 * [Java Senior Quiz 🧩](https://youtube.com/playlist?list=PLO5muTI694A5yRrEDNY1czqEUVbYHG_AH&si=KteWFowVcOSTQ8F-)
-* [Action Jackson! Effective JSON processing in Spring Boot Applications by Joris Kuipers @ Spring I/O](https://youtu.be/BhiF6e24l5k?si=IxS0X6FtgfWzdP-c)
+* [Action Jackson! Effective JSON processing in Spring Boot Applications by Joris Kuipers @ Spring I/O](https://youtu.be/BhiF6e24l5k?si=IxS0X6FtgfWzdP-c)
+* [Spring Boot testing: Zero to Hero by Daniel Garnier-Moiroux](https://youtu.be/u5foQULTxHM?si=WPZKUZY-DMqcHGdG)

spring-web-lab/pom.xml

@@ -26,10 +26,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-webflux</artifactId>
-        </dependency>
     </dependencies>
 
 </project>

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

@@ -0,0 +1,16 @@
+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;
+
+@RequestMapping("/hello")
+@RestController
+class HelloController {
+
+    @GetMapping
+    String hello() {
+        return "🗺️ Hello World!";
+    }
+
+}

spring-web-lab/src/test/java/pl/mperor/lab/spring/SpringMockMvcTest.java

@@ -0,0 +1,47 @@
+package pl.mperor.lab.spring;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.web.client.MockMvcClientHttpRequestFactory;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.assertj.MockMvcTester;
+import org.springframework.web.client.RestClient;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+public class SpringMockMvcTest {
+
+    @Autowired
+    private MockMvc mvc;
+    @Autowired
+    private MockMvcTester tester;
+
+    @Test
+    public void shouldReturnHealthStatusUp() throws Exception {
+        mvc.perform(get("/actuator/health"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.status").value("UP"));
+
+        var restClientBody = RestClient.builder()
+                .requestFactory(new MockMvcClientHttpRequestFactory(mvc)).build()
+                .get()
+                .uri("/actuator/health")
+                .retrieve()
+                .body(String.class);
+        Assertions.assertThat(restClientBody).contains("{\"status\":\"UP\"}");
+
+        tester.get().uri("/actuator/health")
+                .exchange()
+                .assertThat()
+                .hasStatusOk()
+                .bodyJson().extractingPath("$.status").isEqualTo("UP");
+    }
+
+}

spring-web-lab/src/test/java/pl/mperor/lab/spring/SpringWebLabApplicationTest.java

@@ -1,30 +1,12 @@
 package pl.mperor.lab.spring;
 
 import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.http.HttpStatus;
-import org.springframework.test.web.reactive.server.WebTestClient;
 
-@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
-@AutoConfigureWebTestClient
+@SpringBootTest
 public class SpringWebLabApplicationTest {
 
-    @Autowired
-    private WebTestClient client;
-
     @Test
     public void contextLoads() {
     }
-
-    @Test
-    public void shouldReturnHealthStatusUp() {
-        client.get().uri("/actuator/health")
-                .exchange()
-                .expectStatus().isEqualTo(HttpStatus.OK)
-                .expectBody()
-                .jsonPath("$.status").isEqualTo("UP");
-    }
-
 }

spring-web-lab/src/test/java/pl/mperor/lab/spring/SpringWithTomcatTest.java

@@ -0,0 +1,34 @@
+package pl.mperor.lab.spring;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.web.client.RestClient;
+
+import java.net.URI;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class SpringWithTomcatTest {
+
+    @LocalServerPort
+    private int port;
+    @Autowired
+    private TestRestTemplate restTemplate;
+
+    @Test
+    public void shouldReturnHealthStatusUp() {
+        var body = RestClient.create()
+                .get()
+                .uri("http://localhost:{port}/actuator/health", port)
+                .retrieve()
+                .body(String.class);
+        Assertions.assertThat(body).contains("{\"status\":\"UP\"}");
+
+        var restTemplateBody = restTemplate.getForObject(URI.create("/actuator/health"), String.class);
+        Assertions.assertThat(restTemplateBody).contains("{\"status\":\"UP\"}");
+    }
+
+}

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

@@ -0,0 +1,22 @@
+package pl.mperor.lab.spring.controller;
+
+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.test.web.servlet.assertj.MockMvcTester;
+
+@WebMvcTest
+class HelloControllerTest {
+
+    @Autowired
+    MockMvcTester tester;
+
+    @Test
+    void shouldReturnHelloWorld() {
+        tester.get()
+                .uri("/hello")
+                .exchange()
+                .assertThat().hasStatusOk()
+                .bodyText().isEqualTo("🗺️ Hello World!");
+    }
+}

spring-web-lab/src/test/java/pl/mperor/lab/spring/jackson/JacksonTest.java

@@ -15,6 +15,7 @@ public class JacksonTest {
 
     @Autowired
     private JacksonTester<Sample> sampleTester;
+
     @Autowired
     private JacksonTester<Map<String, Sample>> wrappedTester;
 
@@ -36,7 +37,7 @@ void testSampleMarshalling() throws IOException {
         Assertions.assertThat(wrappedTester.write(wrapped)).isEqualToJson("""
                 {
                     "sample" : {
-                       "integer" : 1,
+                        "integer" : 1,
                         "string" : "Text"
                     }
                 }