This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Security 6.4.1!

Testing Authentication

After applying the Spring Security support to WebTestClient, we can use either annotations or mutateWith support — for example:

Java
Kotlin

import static org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.mockUser;

@Test
public void messageWhenNotAuthenticated() throws Exception {
	this.rest
		.get()
		.uri("/message")
		.exchange()
		.expectStatus().isUnauthorized();
}

// --- WithMockUser ---

@Test
@WithMockUser
public void messageWhenWithMockUserThenForbidden() throws Exception {
	this.rest
		.get()
		.uri("/message")
		.exchange()
		.expectStatus().isEqualTo(HttpStatus.FORBIDDEN);
}

@Test
@WithMockUser(roles = "ADMIN")
public void messageWhenWithMockAdminThenOk() throws Exception {
	this.rest
		.get()
		.uri("/message")
		.exchange()
		.expectStatus().isOk()
		.expectBody(String.class).isEqualTo("Hello World!");
}

// --- mutateWith mockUser ---

@Test
public void messageWhenMutateWithMockUserThenForbidden() throws Exception {
	this.rest
		.mutateWith(mockUser())
		.get()
		.uri("/message")
		.exchange()
		.expectStatus().isEqualTo(HttpStatus.FORBIDDEN);
}

@Test
public void messageWhenMutateWithMockAdminThenOk() throws Exception {
	this.rest
		.mutateWith(mockUser().roles("ADMIN"))
		.get()
		.uri("/message")
		.exchange()
		.expectStatus().isOk()
		.expectBody(String.class).isEqualTo("Hello World!");
}

import org.springframework.test.web.reactive.server.expectBody
import org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.mockUser

//...

@Test
@WithMockUser
fun messageWhenWithMockUserThenForbidden() {
    this.rest.get().uri("/message")
        .exchange()
        .expectStatus().isEqualTo(HttpStatus.FORBIDDEN)
}

@Test
@WithMockUser(roles = ["ADMIN"])
fun messageWhenWithMockAdminThenOk() {
    this.rest.get().uri("/message")
        .exchange()
        .expectStatus().isOk
        .expectBody<String>().isEqualTo("Hello World!")

}

// --- mutateWith mockUser ---

@Test
fun messageWhenMutateWithMockUserThenForbidden() {
    this.rest
        .mutateWith(mockUser())
        .get().uri("/message")
        .exchange()
        .expectStatus().isEqualTo(HttpStatus.FORBIDDEN)
}

@Test
fun messageWhenMutateWithMockAdminThenOk() {
    this.rest
        .mutateWith(mockUser().roles("ADMIN"))
        .get().uri("/message")
        .exchange()
        .expectStatus().isOk
        .expectBody<String>().isEqualTo("Hello World!")
}

In addition to mockUser(), Spring Security ships with several other convenience mutators for things like CSRF and OAuth 2.0.