Switch error views to use SimpleEvaluationContext

Update `ErrorMvcAutoConfiguration` to use `SimpleEvaluationContext`
rather than `StandardEvaluationContext`.

Fixes gh-12507

Author: philwebb

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration.java

@@ -59,7 +59,7 @@
 import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.Expression;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
-import org.springframework.expression.spel.support.StandardEvaluationContext;
+import org.springframework.expression.spel.support.SimpleEvaluationContext;
 import org.springframework.util.PropertyPlaceholderHelper.PlaceholderResolver;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.View;
@@ -276,10 +276,8 @@ private static class ExpressionResolver implements PlaceholderResolver {
 		}
 
 		private EvaluationContext getContext(Map<String, ?> map) {
-			StandardEvaluationContext context = new StandardEvaluationContext();
-			context.addPropertyAccessor(new MapAccessor());
-			context.setRootObject(map);
-			return context;
+			return SimpleEvaluationContext.forPropertyAccessors(new MapAccessor())
+					.withRootObject(map).build();
 		}
 
 		@Override

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfigurationTests.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      http://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.autoconfigure.web;
+
+import org.junit.Rule;
+import org.junit.Test;
+
+import org.springframework.boot.test.rule.OutputCapture;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+import org.springframework.mock.web.MockServletContext;
+import org.springframework.web.context.request.RequestAttributes;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+import org.springframework.web.servlet.View;
+import org.springframework.web.servlet.handler.DispatcherServletWebRequest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ErrorMvcAutoConfiguration}.
+ *
+ * @author Brian Clozel
+ * @author Phillip Webb
+ */
+public class ErrorMvcAutoConfigurationTests {
+
+	@Rule
+	public OutputCapture outputCapture = new OutputCapture();
+
+	@Test
+	public void renderContainsViewWithExceptionDetails() throws Exception {
+		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
+		try {
+			context.setServletContext(new MockServletContext());
+			context.register(ServerProperties.class, ErrorMvcAutoConfiguration.class);
+			context.refresh();
+			View errorView = context.getBean("error", View.class);
+			ErrorAttributes errorAttributes = context.getBean(ErrorAttributes.class);
+			DispatcherServletWebRequest webRequest = createWebRequest(
+					new IllegalStateException("Exception message"), false);
+			errorView.render(errorAttributes.getErrorAttributes(webRequest, true),
+					webRequest.getRequest(), webRequest.getResponse());
+			assertThat(((MockHttpServletResponse) webRequest.getResponse())
+					.getContentAsString()).contains("<div>Exception message</div>");
+		}
+		finally {
+			context.close();
+		}
+	}
+
+	private DispatcherServletWebRequest createWebRequest(Exception ex,
+			boolean committed) {
+		MockHttpServletRequest request = new MockHttpServletRequest("GET", "/path");
+		MockHttpServletResponse response = new MockHttpServletResponse();
+		DispatcherServletWebRequest webRequest = new DispatcherServletWebRequest(request,
+				response);
+		webRequest.setAttribute("javax.servlet.error.exception", ex,
+				RequestAttributes.SCOPE_REQUEST);
+		webRequest.setAttribute("javax.servlet.error.request_uri", "/path",
+				RequestAttributes.SCOPE_REQUEST);
+		response.setCommitted(committed);
+		response.setOutputStreamAccessAllowed(!committed);
+		response.setWriterAccessAllowed(!committed);
+		return webRequest;
+	}
+
+}