fix(cloud-run): CloudRun/HelloWorld upgrade to Java25 along Docker (#10276)

* chore(run): upgrade helloworld sample to Java 25

* fix: kokoro btlr compatability only with Java 21 in pom.xml workaround

* refactor: migrate tests from JUnit 4 to JUnit 5

Author: Kef131

run/helloworld/Dockerfile

@@ -15,7 +15,7 @@
 # [START cloudrun_helloworld_dockerfile]
 # Use the official maven image to create a build artifact.
 # https://hub.docker.com/_/maven
-FROM maven:3-eclipse-temurin-17-alpine as builder
+FROM maven:3-eclipse-temurin-25-alpine as builder
 
 # Copy local code to the container image.
 WORKDIR /app
@@ -27,7 +27,7 @@ RUN mvn package -DskipTests
 
 # Use Eclipse Temurin for base image.
 # https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
-FROM eclipse-temurin:17.0.18_8-jre-alpine
+FROM eclipse-temurin:25-jre-alpine
 
 # Copy the jar to the production image from the builder stage.
 COPY --from=builder /app/target/helloworld-*.jar /helloworld.jar

run/helloworld/pom.xml

@@ -24,7 +24,7 @@ limitations under the License.
   <parent>
     <groupId>com.google.cloud.samples</groupId>
     <artifactId>shared-configuration</artifactId>
-    <version>1.2.0</version>
+    <version>1.2.2</version>
   </parent>
   <dependencyManagement>
     <dependencies>
@@ -41,9 +41,10 @@ limitations under the License.
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <maven.compiler.target>17</maven.compiler.target>
-    <maven.compiler.source>17</maven.compiler.source>
-    <spring-boot.version>3.2.2</spring-boot.version>
+    <!--Change this to 25 in your workspace-->
+    <maven.compiler.source>21</maven.compiler.source>
+    <maven.compiler.target>21</maven.compiler.target>
+    <spring-boot.version>3.5.0</spring-boot.version>
   </properties>
   <dependencies>
     <dependency>
@@ -68,6 +69,11 @@ limitations under the License.
   </dependencies>
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>0.8.14</version>
+      </plugin>
       <plugin>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-maven-plugin</artifactId>
@@ -84,8 +90,11 @@ limitations under the License.
       <plugin>
         <groupId>com.google.cloud.tools</groupId>
         <artifactId>jib-maven-plugin</artifactId>
-        <version>3.4.0</version>
+        <version>3.4.6</version>
         <configuration>
+          <from>
+            <image>eclipse-temurin:25-jre-alpine</image>
+          </from>
           <to>
             <image>gcr.io/PROJECT_ID/helloworld</image>
           </to>

run/helloworld/src/test/java/com/example/helloworld/HelloworldApplicationTests.java

@@ -20,15 +20,12 @@
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
+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.context.junit4.SpringRunner;
 import org.springframework.test.web.servlet.MockMvc;
 
-@RunWith(SpringRunner.class)
 @SpringBootTest
 @AutoConfigureMockMvc
 public class HelloworldApplicationTests {