SAML2 autoconfiguration is not imported by @WebMvcTest

spring-boot-project/spring-boot-test-autoconfigure/build.gradle

@@ -114,10 +114,18 @@ dependencies {
 	testImplementation("org.junit.platform:junit-platform-launcher")
 	testImplementation("org.mockito:mockito-core")
 	testImplementation("org.mockito:mockito-junit-jupiter")
+	testImplementation("org.opensaml:opensaml-core:4.0.1")
+	testImplementation("org.opensaml:opensaml-saml-api:4.0.1")
+	testImplementation("org.opensaml:opensaml-saml-impl:4.0.1")
 	testImplementation("org.skyscreamer:jsonassert")
 	testImplementation("org.springframework:spring-core-test")
 	testImplementation("org.springframework.hateoas:spring-hateoas")
 	testImplementation("org.springframework.plugin:spring-plugin-core")
+	testImplementation("org.springframework.security:spring-security-saml2-service-provider") {
+		exclude group: "org.opensaml", module: "opensaml-core"
+		exclude group: "org.opensaml", module: "opensaml-saml-api"
+		exclude group: "org.opensaml", module: "opensaml-saml-impl"
+	}
 	testImplementation("org.thymeleaf:thymeleaf")
 }
 

spring-boot-project/spring-boot-test-autoconfigure/src/main/resources/META-INF/spring/org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc.imports

@@ -4,6 +4,7 @@ org.springframework.boot.test.autoconfigure.web.servlet.MockMvcWebClientAutoConf
 org.springframework.boot.test.autoconfigure.web.servlet.MockMvcWebDriverAutoConfiguration
 org.springframework.boot.autoconfigure.security.oauth2.client.servlet.OAuth2ClientAutoConfiguration
 org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration
+org.springframework.boot.autoconfigure.security.saml2.Saml2RelyingPartyAutoConfiguration
 org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration
 org.springframework.boot.autoconfigure.security.servlet.SecurityFilterAutoConfiguration
 org.springframework.boot.autoconfigure.security.servlet.UserDetailsServiceAutoConfiguration

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/servlet/mockmvc/WebMvcTestSaml2Tests.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2012-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.test.autoconfigure.web.servlet.mockmvc;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.restdocs.mockmvc.RestDocumentationRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrlPattern;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+/**
+ * Tests for {@link WebMvcTest @WebMvcTest} with SAML2.
+ *
+ * @author Dmytro Nosan
+ */
+@WebMvcTest(controllers = ExampleController1.class, properties = {
+		"spring.security.saml2.relyingparty.registration.test.entity-id=relyingparty",
+		"spring.security.saml2.relyingparty.registration.test.assertingparty.entity-id=assertingparty",
+		"spring.security.saml2.relyingparty.registration.test.assertingparty.singlesignon.url=https://example.com",
+		"spring.security.saml2.relyingparty.registration.test.assertingparty.singlesignon.sign-request=false" })
+class WebMvcTestSaml2Tests {
+
+	@Autowired
+	private MockMvc mockMvc;
+
+	@Test
+	void shouldRedirectToLogin() throws Exception {
+		this.mockMvc.perform(get("/one"))
+			.andExpect(status().isFound())
+			.andExpect(redirectedUrlPattern("**/saml2/authenticate?registrationId=test"));
+	}
+
+}