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Java 44187 #18685

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7af58f4
[JAVA-44187] Intro to Spring Boot Starters
panos-kakos Jul 9, 2025
c6ac17a
[JAVA-44187]
panos-kakos Jul 9, 2025
b7dc93e
[JAVA-44187] Updated spring-boot-testing article
panos-kakos Jul 15, 2025
5f4e5bd
[JAVA-44187]
panos-kakos Jul 15, 2025
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3 changes: 0 additions & 3 deletions ...s/spring-boot-simple/src/test/java/com/baeldung/actuator/ActuatorInfoIntegrationTest.java
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package com.baeldung.actuator;

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.context.SpringBootTest;
import org.springframework.boot.test.web.client.TestRestTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.test.context.junit.jupiter.SpringExtension;

import static org.junit.jupiter.api.Assertions.assertEquals;

@ExtendWith(SpringExtension.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = Application.class)
public class ActuatorInfoIntegrationTest {

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3 changes: 0 additions & 3 deletions ...oot-simple/src/test/java/com/baeldung/boot/testing/EmployeeControllerIntegrationTest.java
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Expand Up @@ -2,15 +2,13 @@

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mockito;
import org.mockito.internal.verification.VerificationModeFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.http.MediaType;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import org.springframework.test.web.servlet.MockMvc;

import java.util.Arrays;
Expand All @@ -26,7 +24,6 @@
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@ExtendWith(SpringExtension.class)
@WebMvcTest(value = EmployeeRestController.class, excludeAutoConfiguration = SecurityAutoConfiguration.class)
public class EmployeeControllerIntegrationTest {

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13 changes: 7 additions & 6 deletions ...oot-simple/src/test/java/com/baeldung/boot/testing/EmployeeRepositoryIntegrationTest.java
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package com.baeldung.boot.testing;

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.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
import org.springframework.test.context.junit.jupiter.SpringExtension;

import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;

@ExtendWith(SpringExtension.class)
@DataJpaTest
public class EmployeeRepositoryIntegrationTest {

Expand Down Expand Up @@ -41,13 +38,15 @@ public void whenFindById_thenReturnEmployee() {
Employee emp = new Employee("test");
entityManager.persistAndFlush(emp);

Employee fromDb = employeeRepository.findById(emp.getId()).orElse(null);
Employee fromDb = employeeRepository.findById(emp.getId())
.orElse(null);
assertThat(fromDb.getName()).isEqualTo(emp.getName());
}

@Test
public void whenInvalidId_thenReturnNull() {
Employee fromDb = employeeRepository.findById(-11l).orElse(null);
Employee fromDb = employeeRepository.findById(-11l)
.orElse(null);
assertThat(fromDb).isNull();
}

Expand All @@ -64,6 +63,8 @@ public void givenSetOfEmployees_whenFindAll_thenReturnAllEmployees() {

List<Employee> allEmployees = employeeRepository.findAll();

assertThat(allEmployees).hasSize(3).extracting(Employee::getName).containsOnly(alex.getName(), ron.getName(), bob.getName());
assertThat(allEmployees).hasSize(3)
.extracting(Employee::getName)
.containsOnly(alex.getName(), ron.getName(), bob.getName());
}
}
13 changes: 6 additions & 7 deletions ...simple/src/test/java/com/baeldung/boot/testing/EmployeeRestControllerIntegrationTest.java
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import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.MediaType;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import org.springframework.test.web.servlet.MockMvc;

import java.io.IOException;
Expand All @@ -25,10 +23,9 @@
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;

@ExtendWith(SpringExtension.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK, classes = Application.class)
@AutoConfigureMockMvc
@EnableAutoConfiguration(exclude=SecurityAutoConfiguration.class)
@AutoConfigureMockMvc
@EnableAutoConfiguration(exclude = SecurityAutoConfiguration.class)
@TestPropertySource(locations = "classpath:application-integrationtest.properties")
public class EmployeeRestControllerIntegrationTest {

Expand All @@ -46,10 +43,12 @@ public void resetDb() {
@Test
public void whenValidInput_thenCreateEmployee() throws IOException, Exception {
Employee bob = new Employee("bob");
mvc.perform(post("/api/employees").contentType(MediaType.APPLICATION_JSON).content(JsonUtil.toJson(bob)));
mvc.perform(post("/api/employees").contentType(MediaType.APPLICATION_JSON)
.content(JsonUtil.toJson(bob)));

List<Employee> found = repository.findAll();
assertThat(found).extracting(Employee::getName).containsOnly("bob");
assertThat(found).extracting(Employee::getName)
.containsOnly("bob");
}

@Test
Expand Down
31 changes: 21 additions & 10 deletions ...ot-simple/src/test/java/com/baeldung/boot/testing/EmployeeServiceImplIntegrationTest.java
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Expand Up @@ -44,12 +44,18 @@ public void setUp() {

List<Employee> allEmployees = Arrays.asList(john, bob, alex);

Mockito.when(employeeRepository.findByName(john.getName())).thenReturn(john);
Mockito.when(employeeRepository.findByName(alex.getName())).thenReturn(alex);
Mockito.when(employeeRepository.findByName("wrong_name")).thenReturn(null);
Mockito.when(employeeRepository.findById(john.getId())).thenReturn(Optional.of(john));
Mockito.when(employeeRepository.findAll()).thenReturn(allEmployees);
Mockito.when(employeeRepository.findById(-99L)).thenReturn(Optional.empty());
Mockito.when(employeeRepository.findByName(john.getName()))
.thenReturn(john);
Mockito.when(employeeRepository.findByName(alex.getName()))
.thenReturn(alex);
Mockito.when(employeeRepository.findByName("wrong_name"))
.thenReturn(null);
Mockito.when(employeeRepository.findById(john.getId()))
.thenReturn(Optional.of(john));
Mockito.when(employeeRepository.findAll())
.thenReturn(allEmployees);
Mockito.when(employeeRepository.findById(-99L))
.thenReturn(Optional.empty());
}

@Test
Expand Down Expand Up @@ -107,21 +113,26 @@ public void given3Employees_whengetAll_thenReturn3Records() {

List<Employee> allEmployees = employeeService.getAllEmployees();
verifyFindAllEmployeesIsCalledOnce();
assertThat(allEmployees).hasSize(3).extracting(Employee::getName).contains(alex.getName(), john.getName(), bob.getName());
assertThat(allEmployees).hasSize(3)
.extracting(Employee::getName)
.contains(alex.getName(), john.getName(), bob.getName());
}

private void verifyFindByNameIsCalledOnce(String name) {
Mockito.verify(employeeRepository, VerificationModeFactory.times(1)).findByName(name);
Mockito.verify(employeeRepository, VerificationModeFactory.times(1))
.findByName(name);
Mockito.reset(employeeRepository);
}

private void verifyFindByIdIsCalledOnce() {
Mockito.verify(employeeRepository, VerificationModeFactory.times(1)).findById(Mockito.anyLong());
Mockito.verify(employeeRepository, VerificationModeFactory.times(1))
.findById(Mockito.anyLong());
Mockito.reset(employeeRepository);
}

private void verifyFindAllEmployeesIsCalledOnce() {
Mockito.verify(employeeRepository, VerificationModeFactory.times(1)).findAll();
Mockito.verify(employeeRepository, VerificationModeFactory.times(1))
.findAll();
Mockito.reset(employeeRepository);
}
}
21 changes: 12 additions & 9 deletions .../spring-boot-simple/src/test/java/com/baeldung/bootstrap/SpringBootBootstrapLiveTest.java
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@@ -1,8 +1,15 @@
package com.baeldung.bootstrap;

import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
import static org.apache.commons.lang3.RandomStringUtils.randomNumeric;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

import com.baeldung.bootstrap.persistence.model.Book;

import io.restassured.RestAssured;
import io.restassured.response.Response;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
Expand All @@ -12,11 +19,6 @@

import java.util.List;

import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
import static org.apache.commons.lang3.RandomStringUtils.randomNumeric;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class SpringBootBootstrapLiveTest {

Expand Down Expand Up @@ -128,10 +130,11 @@ private Book createRandomBook() {

private String createBookAsUri(Book book) {
final Response response = RestAssured.given()
.contentType(MediaType.APPLICATION_JSON_VALUE)
.body(book)
.post(API_ROOT);
return API_ROOT + "/" + response.jsonPath().get("id");
.contentType(MediaType.APPLICATION_JSON_VALUE)
.body(book)
.post(API_ROOT);
return API_ROOT + "/" + response.jsonPath()
.get("id");
}

}
3 changes: 0 additions & 3 deletions ...ot-modules/spring-boot-simple/src/test/java/com/baeldung/bootstrap/SpringContextTest.java
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package com.baeldung.bootstrap;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit.jupiter.SpringExtension;

@ExtendWith(SpringExtension.class)
@SpringBootTest
public class SpringContextTest {

Expand Down
20 changes: 10 additions & 10 deletions ...c/test/java/com/baeldung/configurationproperties/PropertiesConversionIntegrationTest.java
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@@ -1,18 +1,16 @@
package com.baeldung.configurationproperties;

import static org.junit.jupiter.api.Assertions.assertEquals;

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.context.SpringBootTest;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import org.springframework.util.unit.DataSize;

import java.time.Duration;

import static org.junit.jupiter.api.Assertions.assertEquals;

@ExtendWith(SpringExtension.class)
@SpringBootTest(classes = PropertiesConversionApplication.class)
@TestPropertySource("classpath:conversion.properties")
public class PropertiesConversionIntegrationTest {
Expand All @@ -31,13 +29,15 @@ public void whenUseTimeUnitPropertyConversion_thenSuccess() throws Exception {
public void whenUseDataSizePropertyConversion_thenSuccess() throws Exception {
assertEquals(DataSize.ofBytes(300), properties.getSizeInDefaultUnit());
assertEquals(DataSize.ofGigabytes(2), properties.getSizeInGB());
assertEquals(DataSize.ofTerabytes(4), properties.getSizeInTB());
assertEquals(DataSize.ofTerabytes(4), properties.getSizeInTB());
}

@Test
public void whenUseCustomPropertyConverter_thenSuccess() throws Exception {
assertEquals("john", properties.getEmployee().getName());
assertEquals(2000.0, properties.getEmployee().getSalary());
assertEquals("john", properties.getEmployee()
.getName());
assertEquals(2000.0, properties.getEmployee()
.getSalary());
}

}
34 changes: 12 additions & 22 deletions ...-boot-simple/src/test/java/com/baeldung/starter/SpringBootApplicationIntegrationTest.java
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@@ -1,24 +1,21 @@
package com.baeldung.starter;

import static org.hamcrest.Matchers.hasSize;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;

import org.junit.jupiter.api.BeforeEach;
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.context.SpringBootTest;
import org.springframework.http.MediaType;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;

import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.hasSize;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;

@ExtendWith(SpringExtension.class)
@SpringBootTest(classes = Application.class)
@WebAppConfiguration
public class SpringBootApplicationIntegrationTest {
Expand All @@ -30,24 +27,17 @@ public class SpringBootApplicationIntegrationTest {

@BeforeEach
public void setupMockMvc() {
mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
.build();
}

@Test
public void givenRequestHasBeenMade_whenMeetsAllOfGivenConditions_thenCorrect()
throws Exception {
public void givenRequestHasBeenMade_whenMeetsAllOfGivenConditions_thenCorrect() throws Exception {
mockMvc.perform(MockMvcRequestBuilders.get("/entity/all"))
.andExpect(MockMvcResultMatchers.status().isOk())
.andExpect(MockMvcResultMatchers.content().contentType(MediaType.APPLICATION_JSON))
.andExpect(jsonPath("$", hasSize(4)));
.andExpect(MockMvcResultMatchers.status()
.isOk())
.andExpect(MockMvcResultMatchers.content()
.contentType(MediaType.APPLICATION_JSON))
.andExpect(jsonPath("$", hasSize(4)));
}

@Test
public void givenRequestHasBeenMade_whenMeetsFindByDateOfGivenConditions_thenCorrect()
throws Exception {
mockMvc.perform(MockMvcRequestBuilders.get("/entity/findbydate/{date}", "2011-12-03T10:15:30"))
.andExpect(MockMvcResultMatchers.status().isOk()).andExpect(MockMvcResultMatchers.content().contentType(MediaType.APPLICATION_JSON))
.andExpect(jsonPath("$.id", equalTo(1)));
}

}
10 changes: 5 additions & 5 deletions ...s/spring-boot-simple/src/test/java/com/baeldung/starter/SpringBootJPAIntegrationTest.java
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@@ -1,17 +1,17 @@
package com.baeldung.starter;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;

import com.baeldung.starter.domain.GenericEntity;
import com.baeldung.starter.repository.GenericEntityRepository;

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.context.SpringBootTest;
import org.springframework.test.context.junit.jupiter.SpringExtension;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;

@ExtendWith(SpringExtension.class)
@SpringBootTest(classes = Application.class)
public class SpringBootJPAIntegrationTest {
@Autowired
Expand Down
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