Polish test classes

- Consistent importing of org.junit.Assert.*;
- Proper declaration of expected exceptions via @Test(expected).
- Renamed SpEL ExpressionTestCase to AbstractExpressionTests.
- Formatting and test method naming conventions.

spring-webmvc/src/test/java/org/springframework/web/servlet/support/AbstractFlashMapManagerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -17,12 +17,6 @@
 package org.springframework.web.servlet.support;
 
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertSame;
-import static org.junit.Assert.assertTrue;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -33,11 +27,14 @@ import javax.servlet.http.HttpServletResponse;
 
 import org.junit.Before;
 import org.junit.Test;
+
 import org.springframework.mock.web.test.MockHttpServletRequest;
 import org.springframework.mock.web.test.MockHttpServletResponse;
 import org.springframework.web.servlet.FlashMap;
 import org.springframework.web.util.WebUtils;
 
+import static org.junit.Assert.*;
+
 /**
  * Test fixture for testing {@link AbstractFlashMapManager} methods.
  *