feature: integration tests example with extensions

pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.3.0</version>
+        <version>3.3.1</version>
         <relativePath/>
     </parent>
 

src/main/java/br/com/multidatasources/model/Billionaire.java

@@ -4,11 +4,22 @@
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
 
 import java.util.Objects;
 
-@Entity
-@Table(name = "billionaire")
+@Entity(name = "Billionaire")
+@Table(
+    name = "billionaires",
+    uniqueConstraints = {
+        @UniqueConstraint(
+            name = "uk_billionaires_idempotency_id",
+            columnNames = {
+                "idempotency_id"
+            }
+        )
+    }
+)
 public class Billionaire extends IdempotentEntity {
 
     @Column(name = "first_name", nullable = false)

src/main/resources/db/migration/V0001__inialize-database-schema.sql

@@ -1,4 +1,4 @@
-CREATE TABLE billionaire (
+CREATE TABLE billionaires (
     id INT AUTO_INCREMENT PRIMARY KEY,
     first_name VARCHAR(255) NOT NULL,
     last_name VARCHAR(255) NOT NULL,

src/main/resources/db/test-data/afterMigrate.sql

@@ -1,9 +1,9 @@
 SET foreign_key_checks = 0;
 
-TRUNCATE TABLE billionaire;
+TRUNCATE TABLE billionaires;
 
 SET foreign_key_checks = 1;
 
-INSERT INTO billionaire (first_name, last_name, career, idempotency_id) VALUES ('Aliko', 'Dangote', 'Billionaire Industrialist', UUID()),
-                                                                               ('Bill', 'Gates', 'Billionaire Tech Entrepreneur', UUID()),
-                                                                               ('Folrunsho', 'Alakija', 'Billionaire Oil Magnate', UUID());
+INSERT INTO billionaires (first_name, last_name, career, idempotency_id) VALUES ('Aliko', 'Dangote', 'Billionaire Industrialist', UUID()),
+                                                                                ('Bill', 'Gates', 'Billionaire Tech Entrepreneur', UUID()),
+                                                                                ('Folrunsho', 'Alakija', 'Billionaire Oil Magnate', UUID());

src/test/java/br/com/multidatasources/CleanupDatabaseExtension.java

@@ -0,0 +1,35 @@
+package br.com.multidatasources;
+
+import org.junit.jupiter.api.extension.BeforeEachCallback;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import java.util.Map;
+
+@ActiveProfiles("integration-test")
+public class CleanupDatabaseExtension implements BeforeEachCallback {
+
+    @Override
+    public void beforeEach(final ExtensionContext context) {
+        final var applicationContext = SpringExtension.getApplicationContext(context);
+        final var repositoryBeans = applicationContext.getBeansWithAnnotation(Repository.class);
+        cleanupDatabase(repositoryBeans);
+    }
+
+    private static void cleanupDatabase(final Map<String, Object> repositoryBeans) {
+        repositoryBeans.values().forEach(CleanupDatabaseExtension::deleteAll);
+    }
+
+    private static void deleteAll(final Object repository) {
+        switch (repository) {
+            case JpaRepository<?, ?> jpaRepository -> jpaRepository.deleteAllInBatch();
+            case CrudRepository<?, ?> crudRepository -> crudRepository.deleteAll();
+            default -> throw new IllegalArgumentException("Unsupported repository type: " + repository.getClass());
+        }
+    }
+
+}

src/test/java/br/com/multidatasources/DatabaseRepositoryIntegrationTest.java

@@ -0,0 +1,36 @@
+package br.com.multidatasources;
+
+import br.com.multidatasources.config.datasource.DataSourceRoutingConfiguration;
+import br.com.multidatasources.config.datasource.master.MasterDataSourceConfiguration;
+import br.com.multidatasources.config.datasource.replica.ReplicaDataSourceConfiguration;
+import br.com.multidatasources.config.properties.datasource.DataSourceConnectionPropertiesConfiguration;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ActiveProfiles;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Inherited
+@ActiveProfiles("integration-test")
+@DataJpaTest
+@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
+@ExtendWith(CleanupDatabaseExtension.class)
+@Import(
+    value = {
+        MasterDataSourceConfiguration.class,
+        ReplicaDataSourceConfiguration.class,
+        DataSourceRoutingConfiguration.class,
+        DataSourceConnectionPropertiesConfiguration.class
+    }
+)
+public @interface DatabaseRepositoryIntegrationTest {
+
+}

src/test/java/br/com/multidatasources/DefaultBillionaire.java

@@ -0,0 +1,19 @@
+package br.com.multidatasources;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.util.UUID;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.PARAMETER)
+public @interface DefaultBillionaire {
+
+    String firstName() default "John";
+
+    String lastName() default "Doe";
+
+    String career() default "SWE";
+
+}

src/test/java/br/com/multidatasources/DefaultBillionaireParameterResolverExtension.java

@@ -0,0 +1,47 @@
+package br.com.multidatasources;
+
+import br.com.multidatasources.model.Billionaire;
+import br.com.multidatasources.model.factory.BillionaireBuilder;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolutionException;
+import org.junit.jupiter.api.extension.ParameterResolver;
+
+import java.lang.reflect.Parameter;
+import java.util.Optional;
+
+public class DefaultBillionaireParameterResolverExtension implements ParameterResolver {
+
+    @Override
+    public boolean supportsParameter(final ParameterContext parameterContext, final ExtensionContext extensionContext) throws ParameterResolutionException {
+        return parameterContext.isAnnotated(DefaultBillionaire.class);
+    }
+
+    @Override
+    public Object resolveParameter(final ParameterContext parameterContext, final ExtensionContext extensionContext) throws ParameterResolutionException {
+        return defaultBillionaire(parameterContext.getParameter());
+    }
+
+    private static Billionaire defaultBillionaire(final Parameter parameter) {
+        if (parameter.getType() != Billionaire.class) {
+            throw new IllegalArgumentException("Parameter must be of type Billionaire");
+        }
+
+        final var firstName = Optional.ofNullable(parameter.getAnnotation(DefaultBillionaire.class))
+            .map(DefaultBillionaire::firstName)
+            .orElse("John");
+        final var lastName = Optional.ofNullable(parameter.getAnnotation(DefaultBillionaire.class))
+            .map(DefaultBillionaire::lastName)
+            .orElse("Doe");
+        final var career = Optional.ofNullable(parameter.getAnnotation(DefaultBillionaire.class))
+            .map(DefaultBillionaire::career)
+            .orElse("Doe");
+
+        return BillionaireBuilder.builder()
+            .firstName(firstName)
+            .lastName(lastName)
+            .career(career)
+            .build();
+    }
+
+}

src/test/java/br/com/multidatasources/IntegrationTest.java

@@ -0,0 +1,31 @@
+package br.com.multidatasources;
+
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.core.annotation.AliasFor;
+import org.springframework.test.context.ActiveProfiles;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Inherited
+@ActiveProfiles("integration-test")
+@SpringBootTest(
+     webEnvironment = WebEnvironment.NONE
+)
+@ExtendWith(CleanupDatabaseExtension.class)
+public @interface IntegrationTest {
+
+    @AliasFor(annotation = SpringBootTest.class, attribute = "classes")
+    Class<?>[] classes() default {};
+
+    @AliasFor(annotation = SpringBootTest.class, attribute = "properties")
+    String[] properties() default {};
+
+}

src/test/java/br/com/multidatasources/repository/BillionaireRepositoryIntegrationTest.java

@@ -0,0 +1,42 @@
+package br.com.multidatasources.repository;
+
+import br.com.multidatasources.DatabaseRepositoryIntegrationTest;
+import br.com.multidatasources.model.factory.BillionaireBuilder;
+import br.com.multidatasources.service.v1.idempotency.impl.UUIDIdempotencyGenerator;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.UUID;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DatabaseRepositoryIntegrationTest
+class BillionaireRepositoryIntegrationTest {
+
+    @Autowired
+    private BillionaireRepository billionaireRepository;
+
+    @Test
+    void givenExistentIdempotencyId_whenExistsBillionaireByIdempotencyId_thenReturnTrue() {
+        final var idempotencyGenerator = new UUIDIdempotencyGenerator();
+        final var billionaire = BillionaireBuilder.builder()
+            .firstName("John")
+            .lastName("Doe")
+            .career("SWE")
+            .build();
+
+        billionaire.generateIdempotencyId(idempotencyGenerator);
+        this.billionaireRepository.save(billionaire);
+
+        final var actual = this.billionaireRepository.existsBillionaireByIdempotencyId(billionaire.getIdempotencyId());
+
+        assertThat(actual).isTrue();
+    }
+
+    @Test
+    void givenANonExistentIdempotencyId_whenExistsBillionaireByIdempotencyId_thenReturnFalse() {
+        final var actual = this.billionaireRepository.existsBillionaireByIdempotencyId(UUID.randomUUID());
+        assertThat(actual).isFalse();
+    }
+
+}

src/test/java/br/com/multidatasources/service/v1/BillionaireServiceIntegrationTest.java

@@ -0,0 +1,106 @@
+package br.com.multidatasources.service.v1;
+
+import br.com.multidatasources.DefaultBillionaire;
+import br.com.multidatasources.DefaultBillionaireParameterResolverExtension;
+import br.com.multidatasources.IntegrationTest;
+import br.com.multidatasources.model.Billionaire;
+import br.com.multidatasources.repository.BillionaireRepository;
+import br.com.multidatasources.service.v1.idempotency.IdempotencyGenerator;
+import br.com.multidatasources.service.v1.idempotency.impl.UUIDIdempotencyGenerator;
+import jakarta.persistence.EntityNotFoundException;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.mock.mockito.SpyBean;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.Mockito.verify;
+
+@IntegrationTest
+@ExtendWith(DefaultBillionaireParameterResolverExtension.class)
+class BillionaireServiceIntegrationTest {
+
+    @SpyBean
+    private IdempotencyGenerator idempotencyGenerator;
+
+    @Autowired
+    @SpyBean
+    private BillionaireRepository billionaireRepository;
+
+    @Autowired
+    private BillionaireService billionaireService;
+
+    @Test
+    void givenAValidBillionaireId_whenFindBillionaireById_thenReturnASameBillionaireInformed(@DefaultBillionaire final Billionaire billionaire) {
+        final var localIdempotencyGenerator = new UUIDIdempotencyGenerator();
+        billionaire.generateIdempotencyId(localIdempotencyGenerator);
+        final var persistedBillionaire = this.billionaireRepository.saveAndFlush(billionaire);
+
+        final var actual = this.billionaireService.findById(persistedBillionaire.getId());
+
+        assertThat(actual)
+            .usingRecursiveComparison()
+            .isEqualTo(persistedBillionaire);
+
+        verify(this.billionaireRepository).findById(persistedBillionaire.getId());
+    }
+
+    @Test
+    void givenAInvalidBillionaireId_whenFindBillionaireById_thenThrowEntityNotFoundException() {
+        final var invalidBillionaireId = 0L;
+
+        assertThatThrownBy(() -> this.billionaireService.findById(invalidBillionaireId))
+            .isInstanceOf(EntityNotFoundException.class)
+            .hasMessage("Register with id 0 not found");
+
+        verify(this.billionaireRepository).findById(invalidBillionaireId);
+    }
+
+    @Test
+    void givenATwoBillionaires_whenFindAll_thenReturnListWithTwoRegistries(
+        @DefaultBillionaire final Billionaire billionaireOne,
+        @DefaultBillionaire(firstName = "Jake") final Billionaire billionaireTwo
+    ) {
+        final var localIdempotencyGenerator = new UUIDIdempotencyGenerator();
+        billionaireOne.generateIdempotencyId(localIdempotencyGenerator);
+        billionaireTwo.generateIdempotencyId(localIdempotencyGenerator);
+        this.billionaireRepository.saveAllAndFlush(List.of(billionaireOne, billionaireTwo));
+
+        final var actual = this.billionaireService.findAll();
+
+        assertThat(actual)
+            .hasSize(2)
+            .usingRecursiveFieldByFieldElementComparator()
+            .containsExactlyInAnyOrder(billionaireOne, billionaireTwo);
+
+        verify(this.billionaireRepository).findAll();
+    }
+
+    @Test
+    void givenEmptyDataBillionaires_whenFindAll_thenReturnListWithZeroRegistries() {
+        final var actual = this.billionaireService.findAll();
+        assertThat(actual).isEmpty();
+        verify(this.billionaireRepository).findAll();
+    }
+
+    @Test
+    void givenANewBillionaire_whenSave_thenReturnASameBillionaireSaved(@DefaultBillionaire final Billionaire billionaire) {
+        final var localIdempotencyGenerator = new UUIDIdempotencyGenerator();
+        billionaire.generateIdempotencyId(localIdempotencyGenerator);
+
+        final var actual = this.billionaireService.save(billionaire);
+
+        assertThat(actual)
+            .usingRecursiveComparison()
+            .ignoringFields("id")
+            .isEqualTo(billionaire);
+
+        verify(this.idempotencyGenerator).generate(billionaire);
+        verify(this.billionaireRepository).existsBillionaireByIdempotencyId(billionaire.getIdempotencyId());
+        verify(this.billionaireRepository).save(billionaire);
+    }
+
+}