feat(core): remove test execution statistics

PRODUCT.md

@@ -0,0 +1,18 @@
+# Ideas
+
+## Structure
+
+Content
+
+Health Check
+
+Optimization Potential
+
+Target Run Time
+
+## Visualize
+
+Display the top three slowest context
+Identify which context are full and which are sliced ones (feedback from Wim)
+build up current test time
+Better reuse stats due to context refresh issues

README.md

@@ -1,10 +1,12 @@
-# Profile Your Tests. Speed Up Your Tests. Ship Faster 🚤
+# Profile Your Tests. Speed Up Your Build. Ship Faster 🚤
 
 <p align="center">
   <img src="docs/resources/spring-test-profiler-logo-three-256x256.png" alt="Spring Test Profiler Logo" />
 </p>
 
-A Spring Test utility that provides visualization and insights for Spring Test execution, with a focus on Spring context caching statistics.
+The Spring Test Profiler is a Spring Test utility that provides visualization and insights for Spring Test execution, with a focus on Spring context caching.
+
+It helps you identify optimization opportunities in your Spring Test suite to speed up your builds and ship to production faster and with more confidence.
 
 Find [more information](https://pragmatech.digital/products/spring-test-profiler/) about the profiler on our website.
 

demo/spring-boot-3.5-maven/src/main/java/digital/pragmatech/demo/DemoApplication.java

@@ -7,7 +7,9 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ApplicationContext;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
+@EnableScheduling
 @SpringBootApplication
 public class DemoApplication implements CommandLineRunner {
 

demo/spring-boot-3.5-maven/src/main/java/digital/pragmatech/demo/service/ScheduledLogger.java

@@ -0,0 +1,24 @@
+package digital.pragmatech.demo.service;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.ApplicationContext;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ScheduledLogger {
+
+  private static final Logger LOG = LoggerFactory.getLogger(ScheduledLogger.class);
+
+  private final ApplicationContext applicationContext;
+
+  public ScheduledLogger(ApplicationContext applicationContext) {
+    this.applicationContext = applicationContext;
+  }
+
+  // @Scheduled(fixedDelay = 100L)
+  public void log() {
+    LOG.info("Scheduled task executed within context '{}'.", applicationContext.hashCode());
+  }
+}

demo/spring-boot-3.5-maven/src/main/java/digital/pragmatech/demo/service/SlowDown.java

@@ -0,0 +1,21 @@
+package digital.pragmatech.demo.service;
+
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.stereotype.Component;
+
+@Component
+public class SlowDown implements CommandLineRunner {
+
+  @Override
+  public void run(String... args) throws Exception {
+    try {
+      Thread.sleep(5000);
+      System.out.println("ApplicationContext initialized after delay.");
+    }
+    catch (InterruptedException e) {
+      throw new RuntimeException(e);
+    }
+  }
+}

demo/spring-boot-3.5-maven/src/test/java/digital/pragmatech/demo/MigrationIT.java

@@ -0,0 +1,26 @@
+package digital.pragmatech.demo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.properties.PropertyMapping;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.test.context.TestPropertySources;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+// Spring Boot < 4.0
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = "management.server.port=")
+public class MigrationIT {
+
+  @Autowired
+  private TestRestTemplate restTemplate;
+
+  @Test
+  void shouldReturnSuccessfulHealthCheckRestTemplate() {
+    var response = restTemplate
+      .getForEntity("/actuator/health", String.class);
+
+    assertThat(response.getStatusCode().value()).isEqualTo(200);
+  }
+}

demo/spring-boot-3.5-maven/src/test/java/digital/pragmatech/demo/pausing/BasicIT.java

@@ -0,0 +1,25 @@
+package digital.pragmatech.demo.pausing;
+
+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 static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = "management.server.port=")
+public class BasicIT {
+
+  @Autowired
+  private TestRestTemplate restTemplate;
+
+  @Test
+  void shouldReturnSuccessfulHealthCheckRestTemplate() throws Exception {
+    var response = restTemplate
+      .getForEntity("/actuator/health", String.class);
+
+    assertThat(response.getStatusCode().value()).isEqualTo(200);
+
+    Thread.sleep(5_000); // Pausing to allow scheduled tasks to run
+  }
+}

demo/spring-boot-3.5-maven/src/test/java/digital/pragmatech/demo/pausing/OtherIT.java

@@ -0,0 +1,25 @@
+package digital.pragmatech.demo.pausing;
+
+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 static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = "management.server.port=")
+public class OtherIT {
+
+  @Autowired
+  private TestRestTemplate restTemplate;
+
+  @Test
+  void shouldReturnSuccessfulHealthCheckRestTemplate() throws Exception {
+    var response = restTemplate
+      .getForEntity("/actuator/health", String.class);
+
+    assertThat(response.getStatusCode().value()).isEqualTo(200);
+
+    Thread.sleep(5_000); // Pausing to allow scheduled tasks to run
+  }
+}

demo/spring-boot-4.0-maven/pom.xml

@@ -8,7 +8,7 @@
   <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
-    <version>4.0.0-M2</version>
+    <version>4.0.0-RC2</version>
     <relativePath/> <!-- lookup parent from repository -->
   </parent>
 
@@ -61,13 +61,31 @@
       <scope>runtime</scope>
     </dependency>
 
-    <!-- Test dependencies -->
+    <!-- Test dependencies, now more modular in Spring Boot 4.0  -->
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-test</artifactId>
       <scope>test</scope>
     </dependency>
 
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-webmvc-test</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-webclient-test</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-restclient-test</artifactId>
+      <scope>test</scope>
+    </dependency>
+
     <!-- Spring Test Insight Extension -->
     <dependency>
       <groupId>digital.pragmatech.testing</groupId>

demo/spring-boot-4.0-maven/src/main/java/digital/pragmatech/demo/DemoApplication.java

@@ -7,7 +7,9 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ApplicationContext;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
+@EnableScheduling
 @SpringBootApplication
 public class DemoApplication implements CommandLineRunner {
 

demo/spring-boot-4.0-maven/src/main/java/digital/pragmatech/demo/service/OtherService.java

@@ -0,0 +1,13 @@
+package digital.pragmatech.demo.service;
+
+import org.springframework.context.annotation.Scope;
+import org.springframework.stereotype.Component;
+
+@Component
+@Scope("prototype")
+public class OtherService {
+
+  public String doWork() {
+    return "Other Service is working!";
+  }
+}

demo/spring-boot-4.0-maven/src/main/java/digital/pragmatech/demo/service/ScheduledLogger.java

@@ -0,0 +1,32 @@
+package digital.pragmatech.demo.service;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.event.ContextPausedEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ScheduledLogger {
+
+  private static final Logger LOG = LoggerFactory.getLogger(ScheduledLogger.class);
+
+  private final ApplicationContext applicationContext;
+
+  public ScheduledLogger(ApplicationContext applicationContext) {
+    this.applicationContext = applicationContext;
+  }
+
+  @Scheduled(fixedDelay = 100L)
+  public void log() {
+    LOG.info("Scheduled task executed within context '{}'.", applicationContext.hashCode());
+  }
+
+  // New event in Spring Framework 7.0
+  @EventListener(ContextPausedEvent.class)
+  public void contextPaused(ContextPausedEvent event) {
+    LOG.info("Application context '{}' has been paused.", event.getApplicationContext().hashCode());
+  }
+}

demo/spring-boot-4.0-maven/src/test/java/digital/pragmatech/demo/BadOneIT.java

@@ -5,12 +5,14 @@
 import digital.pragmatech.demo.entity.Book;
 import digital.pragmatech.demo.entity.BookCategory;
 import digital.pragmatech.demo.repository.BookRepository;
+import digital.pragmatech.demo.service.OtherService;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.bean.override.mockito.MockitoBean;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
@@ -30,6 +32,9 @@
 @DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD) // BAD: Forces context reload
 class BadOneIT {
 
+  @MockitoBean
+  private OtherService otherService;
+
   private final BookRepository bookRepository;
 
   public BadOneIT(@Autowired BookRepository bookRepository) {

demo/spring-boot-4.0-maven/src/test/java/digital/pragmatech/demo/BadThreeIT.java

@@ -6,9 +6,10 @@
 import digital.pragmatech.demo.entity.BookCategory;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureWebMvc;
+import org.springframework.boot.resttestclient.autoconfigure.AutoConfigureTestRestTemplate;
+import org.springframework.boot.webmvc.test.autoconfigure.AutoConfigureWebMvc;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.test.client.TestRestTemplate;
+import org.springframework.boot.resttestclient.TestRestTemplate;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.test.context.ActiveProfiles;
@@ -24,8 +25,8 @@
  * Also uses webEnvironment.RANDOM_PORT but different from other tests.
  */
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
-@AutoConfigureWebMvc // BAD: Unnecessary annotation that changes context
 @ActiveProfiles("test") // Same as first test, but other config differs
+@AutoConfigureTestRestTemplate
 @TestPropertySource(properties = {
   "spring.datasource.url=jdbc:h2:mem:badtest3;DB_CLOSE_DELAY=-1", // Different DB name again
   "spring.jpa.hibernate.ddl-auto=create-drop",

demo/spring-boot-4.0-maven/src/test/java/digital/pragmatech/demo/MigrationIT.java

@@ -0,0 +1,41 @@
+package digital.pragmatech.demo;
+
+import org.junit.jupiter.api.Test; // Junit 6 - yay
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.resttestclient.TestRestTemplate;
+import org.springframework.boot.resttestclient.autoconfigure.AutoConfigureRestTestClient;
+import org.springframework.boot.resttestclient.autoconfigure.AutoConfigureTestRestTemplate;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.web.servlet.client.RestTestClient;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@AutoConfigureTestRestTemplate
+@AutoConfigureRestTestClient // consider as an alternative to the TestRestTemplate
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class MigrationIT {
+
+  @Autowired
+  private TestRestTemplate restTemplate;
+
+  @Autowired
+  private RestTestClient restClient;
+
+  @Test
+  void shouldReturnSuccessfulHealthCheckRestTemplate() {
+    var response = restTemplate
+      .getForEntity("/actuator/health", String.class);
+
+    assertThat(response.getStatusCode().value()).isEqualTo(200);
+  }
+
+  @Test
+  void shouldReturnSuccessfulHealthCheckRestClient() {
+    restClient
+      .get()
+      .uri("/actuator/health")
+      .exchange()
+      .expectStatus()
+      .is2xxSuccessful();
+  }
+}

demo/spring-boot-4.0-maven/src/test/java/digital/pragmatech/demo/pausing/HealthCheckIT.java

@@ -0,0 +1,27 @@
+package digital.pragmatech.demo.pausing;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.resttestclient.autoconfigure.AutoConfigureRestTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.web.servlet.client.RestTestClient;
+
+@AutoConfigureRestTestClient
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class HealthCheckIT {
+
+  @Autowired
+  private RestTestClient restClient;
+
+  @Test
+  void shouldReturnSuccessfulHealthCheckRestClient() throws Exception {
+    restClient
+      .get()
+      .uri("/actuator/health")
+      .exchange()
+      .expectStatus()
+      .is2xxSuccessful();
+
+    Thread.sleep(5_000); // Pausing to allow scheduled tasks to run
+  }
+}