[JAVA] Correspondence of the part where Authentication # getDetails is done in the unit test of spring-security

background

In the spring-security unit test, there is a place where the controller method is Authentication # getDetails as shown below, and this is `` `NullPointerException```.

SampleDetails details = (SampleDetails)auth.getDetails();
details.getHoge();

There seemed to be no way to set this for WithMockUser, so I thought of another way.

Coping

pom.xml

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.3.RELEASE</version>
	</parent>

	<properties>
		<java.version>10.0</java.version>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-security</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-test</artifactId>
			<scope>test</scope>
		</dependency>

Below is the test code.

import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

import org.junit.Test;
import org.junit.runner.RunWith;
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.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.test.context.support.WithMockUser;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;

import kagamihoge.springmvcsample.controller.SampleDetails;


@RunWith(SpringRunner.class)
@SpringBootTest(
        webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
        classes = App.class)
@AutoConfigureMockMvc
public class SecurityTest {
    @Autowired
    private MockMvc mvc;

    @Test
    @WithMockUser
    public void whenGetCustomers_thenStatus200() throws Exception {
        UsernamePasswordAuthenticationToken auth = (UsernamePasswordAuthenticationToken)SecurityContextHolder.getContext().getAuthentication();
        auth.setDetails(new SampleDetails());
        
        mvc.perform(get("/hoge"))
                .andExpect(status().isOk());
    }
}

Well, I'm sure I'll cast it with the belief that UsernamePasswordAuthenticationToken will be used, and in `` `setDetails``` I'll put in the appropriate values for testing. I dealt with this method.