Add Authorization Proxy Support

Closes gh-14596

config/src/test/java/org/springframework/security/config/annotation/method/configuration/AuthorizationProxyConfigurationTests.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright 2002-2024 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.security.config.annotation.method.configuration;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.access.prepost.PostAuthorize;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.security.authorization.AuthorizationProxyFactory;
+import org.springframework.security.config.test.SpringTestContext;
+import org.springframework.security.config.test.SpringTestContextExtension;
+import org.springframework.security.test.context.annotation.SecurityTestExecutionListeners;
+import org.springframework.security.test.context.support.WithMockUser;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+
+/**
+ * Tests for {@link PrePostMethodSecurityConfiguration}.
+ *
+ * @author Evgeniy Cheban
+ * @author Josh Cummings
+ */
+@ExtendWith({ SpringExtension.class, SpringTestContextExtension.class })
+@SecurityTestExecutionListeners
+public class AuthorizationProxyConfigurationTests {
+
+	public final SpringTestContext spring = new SpringTestContext(this);
+
+	@Autowired
+	AuthorizationProxyFactory proxyFactory;
+
+	@WithMockUser
+	@Test
+	public void proxyWhenNotPreAuthorizedThenDenies() {
+		this.spring.register(DefaultsConfig.class).autowire();
+		Toaster toaster = (Toaster) this.proxyFactory.proxy(new Toaster());
+		assertThatExceptionOfType(AccessDeniedException.class).isThrownBy(toaster::makeToast)
+			.withMessage("Access Denied");
+		assertThatExceptionOfType(AccessDeniedException.class).isThrownBy(toaster::extractBread)
+			.withMessage("Access Denied");
+	}
+
+	@WithMockUser(roles = "ADMIN")
+	@Test
+	public void proxyWhenPreAuthorizedThenAllows() {
+		this.spring.register(DefaultsConfig.class).autowire();
+		Toaster toaster = (Toaster) this.proxyFactory.proxy(new Toaster());
+		toaster.makeToast();
+		assertThat(toaster.extractBread()).isEqualTo("yummy");
+	}
+
+	@EnableMethodSecurity
+	@Configuration
+	static class DefaultsConfig {
+
+	}
+
+	static class Toaster {
+
+		@PreAuthorize("hasRole('ADMIN')")
+		void makeToast() {
+
+		}
+
+		@PostAuthorize("hasRole('ADMIN')")
+		String extractBread() {
+			return "yummy";
+		}
+
+	}
+
+}