Merge pull request #45654 from nosan

* pr/45654:
  Add WebMvcTestOAuth2Tests

Closes gh-45654

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

@@ -110,6 +110,7 @@ dependencies {
 	testImplementation("org.mockito:mockito-junit-jupiter")
 	testImplementation("org.skyscreamer:jsonassert")
 	testImplementation("org.springframework:spring-core-test")
+	testImplementation("org.springframework.boot:spring-boot-starter-oauth2-client")
 	testImplementation("org.springframework.hateoas:spring-hateoas")
 	testImplementation("org.springframework.plugin:spring-plugin-core")
 	testImplementation("org.thymeleaf:thymeleaf")

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/servlet/mockmvc/WebMvcTestOAuth2Tests.java

@@ -0,0 +1,48 @@
+/*
+ * 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.test.web.servlet.request.MockMvcRequestBuilders.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 OAuth2.
+ *
+ * @author Dmytro Nosan
+ */
+@WebMvcTest(controllers = ExampleController1.class,
+		properties = { "spring.security.oauth2.client.registration.test.client-id=test",
+				"spring.security.oauth2.client.registration.test.authorization-grant-type=authorization-code",
+				"spring.security.oauth2.client.provider.test.authorization-uri=https://auth.example.org" })
+class WebMvcTestOAuth2Tests {
+
+	@Autowired
+	private MockMvc mockMvc;
+
+	@Test
+	void shouldRedirectToLogin() throws Exception {
+		this.mockMvc.perform(get("/one")).andExpect(status().isFound()).andExpect(redirectedUrlPattern("**/login"));
+	}
+
+}