Add example of Slice Tests

settings.gradle

@@ -18,4 +18,5 @@ include('graphql')
 include('jooq')
 include('test-execution-listeners')
 include('test-rest-assured')
+include('test-slice-tests')
 include('web-rest-client')

test-slice-tests/.gitattributes

@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary

test-slice-tests/.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

test-slice-tests/build.gradle

@@ -0,0 +1,35 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.4.1'
+    id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'zin.rashidi.boot'
+version = '0.0.1-SNAPSHOT'
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-batch'
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    runtimeOnly 'org.postgresql:postgresql'
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testImplementation 'org.springframework.boot:spring-boot-testcontainers'
+    testImplementation 'org.springframework.batch:spring-batch-test'
+    testImplementation 'org.testcontainers:junit-jupiter'
+    testImplementation 'org.testcontainers:postgresql'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}

test-slice-tests/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'test-slice-tests'

test-slice-tests/src/main/java/zin/rashidi/boot/test/slices/TestSliceTestsApplication.java

@@ -0,0 +1,13 @@
+package zin.rashidi.boot.test.slices;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class TestSliceTestsApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(TestSliceTestsApplication.class, args);
+    }
+
+}

test-slice-tests/src/main/java/zin/rashidi/boot/test/slices/user/User.java

@@ -0,0 +1,41 @@
+package zin.rashidi.boot.test.slices.user;
+
+import jakarta.persistence.*;
+
+import static zin.rashidi.boot.test.slices.user.User.Status.ACTIVE;
+
+/**
+ * @author Rashidi Zin
+ */
+@Entity
+@Table(
+        name = "users",
+        uniqueConstraints = @UniqueConstraint(name = "uniqueUsername", columnNames = "username")
+)
+class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Embedded
+    private Name name;
+    private String username;
+    private Status status;
+
+    protected User() {}
+
+    User(Name name, String username) {
+        this.name = name;
+        this.username = username;
+        this.status = ACTIVE;
+    }
+
+    @Embeddable
+    record Name(String first, String last) {}
+
+    enum Status {
+        ACTIVE, DORMANT
+    }
+
+}

test-slice-tests/src/main/java/zin/rashidi/boot/test/slices/user/UserRepository.java

@@ -0,0 +1,9 @@
+package zin.rashidi.boot.test.slices.user;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/**
+ * @author Rashidi Zin
+ */
+interface UserRepository extends JpaRepository<User, Long> {
+}

test-slice-tests/src/main/java/zin/rashidi/boot/test/slices/user/UserResource.java

@@ -0,0 +1,34 @@
+package zin.rashidi.boot.test.slices.user;
+
+import org.springframework.web.bind.annotation.*;
+import zin.rashidi.boot.test.slices.user.User.Name;
+
+import static org.springframework.http.HttpStatus.CREATED;
+
+/**
+ * @author Rashidi Zin
+ */
+@RestController
+class UserResource {
+
+    private final UserRepository repository;
+
+    UserResource(UserRepository repository) {
+        this.repository = repository;
+    }
+
+    @PostMapping("/users")
+    @ResponseStatus(CREATED)
+    public User add(@RequestBody UserRequest request) {
+        return repository.save(new User(request.name(), request.username()));
+    }
+
+    @GetMapping("/users/{id}")
+    public User read(@PathVariable Long id) {
+        return repository.findById(id).orElseThrow();
+    }
+
+    record UserRequest(Name name, String username) {
+    }
+
+}

test-slice-tests/src/main/resources/application.properties

@@ -0,0 +1 @@
+spring.application.name=test-slice-tests

test-slice-tests/src/test/java/zin/rashidi/boot/test/slices/TestSliceTestsApplicationTests.java

@@ -0,0 +1,15 @@
+package zin.rashidi.boot.test.slices;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.Import;
+
+@Import(TestcontainersConfiguration.class)
+@SpringBootTest
+class TestSliceTestsApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}

test-slice-tests/src/test/java/zin/rashidi/boot/test/slices/TestTestSliceTestsApplication.java

@@ -0,0 +1,11 @@
+package zin.rashidi.boot.test.slices;
+
+import org.springframework.boot.SpringApplication;
+
+public class TestTestSliceTestsApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.from(TestSliceTestsApplication::main).with(TestcontainersConfiguration.class).run(args);
+    }
+
+}

test-slice-tests/src/test/java/zin/rashidi/boot/test/slices/TestcontainersConfiguration.java

@@ -0,0 +1,18 @@
+package zin.rashidi.boot.test.slices;
+
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+import org.springframework.context.annotation.Bean;
+import org.testcontainers.containers.PostgreSQLContainer;
+import org.testcontainers.utility.DockerImageName;
+
+@TestConfiguration(proxyBeanMethods = false)
+class TestcontainersConfiguration {
+
+    @Bean
+    @ServiceConnection
+    PostgreSQLContainer<?> postgresContainer() {
+        return new PostgreSQLContainer<>(DockerImageName.parse("postgres:latest"));
+    }
+
+}