Add SecurityContextHolderFilter

Closes gh-9635

web/src/test/java/org/springframework/security/web/context/SecurityContextHolderFilterTests.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2002-2022 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.web.context;
+
+import javax.servlet.FilterChain;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import org.springframework.security.authentication.TestAuthentication;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContext;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.core.context.SecurityContextImpl;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+
+@ExtendWith(MockitoExtension.class)
+class SecurityContextHolderFilterTests {
+
+	@Mock
+	private SecurityContextRepository repository;
+
+	@Mock
+	private HttpServletRequest request;
+
+	@Mock
+	private HttpServletResponse response;
+
+	@Mock
+	private FilterChain chain;
+
+	@Captor
+	private ArgumentCaptor<HttpRequestResponseHolder> requestResponse;
+
+	private SecurityContextHolderFilter filter;
+
+	@BeforeEach
+	void setup() {
+		this.filter = new SecurityContextHolderFilter(this.repository);
+	}
+
+	@AfterEach
+	void cleanup() {
+		SecurityContextHolder.clearContext();
+	}
+
+	@Test
+	void doFilterThenSetsAndClearsSecurityContextHolder() throws Exception {
+		Authentication authentication = TestAuthentication.authenticatedUser();
+		SecurityContext expectedContext = new SecurityContextImpl(authentication);
+		given(this.repository.loadContext(this.requestResponse.capture())).willReturn(expectedContext);
+		FilterChain filterChain = (request, response) -> assertThat(SecurityContextHolder.getContext())
+				.isEqualTo(expectedContext);
+
+		this.filter.doFilter(this.request, this.response, filterChain);
+
+		assertThat(SecurityContextHolder.getContext()).isEqualTo(SecurityContextHolder.createEmptyContext());
+	}
+
+	@Test
+	void shouldNotFilterErrorDispatchWhenDefault() {
+		assertThat(this.filter.shouldNotFilterErrorDispatch()).isFalse();
+	}
+
+	@Test
+	void shouldNotFilterErrorDispatchWhenOverridden() {
+		this.filter.setShouldNotFilterErrorDispatch(true);
+		assertThat(this.filter.shouldNotFilterErrorDispatch()).isTrue();
+	}
+
+}