BAEL-1533 Making a Spring MVC Form Remember Values

- add example code
- update pom dependency to spring boot starter 2.0.0.RC2
- update import in SpringApplicationException

spring-5/pom.xml

@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.0.0.M7</version>
+		<version>2.0.0.RC2</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
@@ -39,10 +39,14 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-webflux</artifactId>
 		</dependency>
-    <dependency>
+		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-hateoas</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.projectreactor</groupId>
 			<artifactId>reactor-spring</artifactId>

spring-5/src/main/java/com/baeldung/execption/SpringExceptionApplication.java

@@ -1,14 +1,14 @@
-package com.baeldung.execption;
+package com.baeldung.execption;
-
+
-import org.springframework.boot.SpringApplication;
+import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
-import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.ComponentScan;
-
+
-@SpringBootApplication(exclude = SecurityAutoConfiguration.class)
+@SpringBootApplication(exclude = SecurityAutoConfiguration.class)
-@ComponentScan(basePackages = { "com.baeldung.execption" })
+@ComponentScan(basePackages = { "com.baeldung.execption" })
-public class SpringExceptionApplication {
+public class SpringExceptionApplication {
-    public static void main(String[] args) {
+    public static void main(String[] args) {
-        SpringApplication.run(SpringExceptionApplication.class, args);
+        SpringApplication.run(SpringExceptionApplication.class, args);
-    }
+    }
 }

spring-5/src/main/java/com/baeldung/sessionattrs/Config.java

@@ -0,0 +1,44 @@
+package com.baeldung.sessionattrs;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Scope;
+import org.springframework.context.annotation.ScopedProxyMode;
+import org.springframework.core.Ordered;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.thymeleaf.templatemode.TemplateMode;
+import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
+import org.thymeleaf.templateresolver.ITemplateResolver;
+
+@EnableWebMvc
+@Configuration
+public class Config implements WebMvcConfigurer {
+
+    @Override
+    public void addViewControllers(ViewControllerRegistry registry) {
+        registry.addViewController("/").setViewName("index");
+        registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
+    }
+
+    @Bean
+    @Scope(
+        value = WebApplicationContext.SCOPE_SESSION, 
+        proxyMode = ScopedProxyMode.TARGET_CLASS)
+    public TodoList todos() {
+        return new TodoList();
+    }
+
+    @Bean
+    public ITemplateResolver templateResolver() {
+        ClassLoaderTemplateResolver resolver 
+            = new ClassLoaderTemplateResolver();
+        resolver.setPrefix("templates/sessionattrs/");
+        resolver.setSuffix(".html");
+        resolver.setTemplateMode(TemplateMode.HTML);
+        resolver.setCharacterEncoding("UTF-8");
+        return resolver;
+    }
+}

spring-5/src/main/java/com/baeldung/sessionattrs/SessionAttrsApplication.java

@@ -0,0 +1,16 @@
+package com.baeldung.sessionattrs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+
+@SpringBootApplication(
+        exclude = {SecurityAutoConfiguration.class, 
+                DataSourceAutoConfiguration.class})
+public class SessionAttrsApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SessionAttrsApplication.class, args);
+    }
+}

spring-5/src/main/java/com/baeldung/sessionattrs/TodoControllerWithScopedProxy.java

@@ -0,0 +1,45 @@
+package com.baeldung.sessionattrs;
+
+import java.time.LocalDateTime;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+@RequestMapping("/scopedproxy")
+public class TodoControllerWithScopedProxy {
+
+    private TodoList todos;
+
+    public TodoControllerWithScopedProxy(TodoList todos) {
+        this.todos = todos;
+    }
+
+    @GetMapping("/form")
+    public String showForm(Model model) {
+        if (!todos.isEmpty()) {
+            model.addAttribute("todo", todos.peekLast());
+        } else {
+            model.addAttribute("todo", new TodoItem());
+        }
+
+        return "scopedproxyform";
+    }
+
+    @PostMapping("/form")
+    public String create(@ModelAttribute TodoItem todo) {
+        todo.setCreateDate(LocalDateTime.now());
+        todos.add(todo);
+        return "redirect:/scopedproxy/todos.html";
+    }
+
+    @GetMapping("/todos.html")
+    public String list(Model model) {
+        model.addAttribute("todos", todos);
+        return "scopedproxytodos";
+    }
+}

spring-5/src/main/java/com/baeldung/sessionattrs/TodoControllerWithSessionAttributes.java

@@ -0,0 +1,55 @@
+package com.baeldung.sessionattrs;
+
+import java.time.LocalDateTime;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.SessionAttributes;
+import org.springframework.web.servlet.mvc.support.RedirectAttributes;
+import org.springframework.web.servlet.view.RedirectView;
+
+@Controller
+@RequestMapping("/sessionattributes")
+@SessionAttributes("todos")
+public class TodoControllerWithSessionAttributes {
+
+    @GetMapping("/form")
+    public String showForm(
+            Model model,
+            @ModelAttribute("todos") TodoList todos) {
+        if (!todos.isEmpty()) {
+            model.addAttribute("todo", todos.peekLast());
+        } else {
+            model.addAttribute("todo", new TodoItem());
+        }
+        return "sessionattributesform";
+    }
+
+    @PostMapping("/form")
+    public RedirectView create(
+            @ModelAttribute TodoItem todo, 
+            @ModelAttribute("todos") TodoList todos, 
+            RedirectAttributes attributes) {
+        todo.setCreateDate(LocalDateTime.now());
+        todos.add(todo);
+        attributes.addFlashAttribute("todos", todos);
+        return new RedirectView("/sessionattributes/todos.html");
+    }
+
+    @GetMapping("/todos.html")
+    public String list(
+            Model model, 
+            @ModelAttribute("todos") TodoList todos) {
+        model.addAttribute("todos", todos);
+        return "sessionattributestodos";
+    }
+
+    @ModelAttribute("todos")
+    public TodoList todos() {
+        return new TodoList();
+    }
+}

spring-5/src/main/java/com/baeldung/sessionattrs/TodoItem.java

@@ -0,0 +1,39 @@
+package com.baeldung.sessionattrs;
+
+import java.time.LocalDateTime;
+
+public class TodoItem {
+
+    private String description;
+    private LocalDateTime createDate;
+
+    public TodoItem(String description, LocalDateTime createDate) {
+        this.description = description;
+        this.createDate = createDate;
+    }
+
+    public TodoItem() {
+        // default no arg constructor
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public LocalDateTime getCreateDate() {
+        return createDate;
+    }
+
+    public void setCreateDate(LocalDateTime createDate) {
+        this.createDate = createDate;
+    }
+
+    @Override
+    public String toString() {
+        return "TodoItem [description=" + description + ", createDate=" + createDate + "]";
+    }
+}

spring-5/src/main/java/com/baeldung/sessionattrs/TodoList.java

@@ -0,0 +1,8 @@
+package com.baeldung.sessionattrs;
+
+import java.util.ArrayDeque;
+
+@SuppressWarnings("serial")
+public class TodoList extends ArrayDeque<TodoItem>{
+
+}

spring-5/src/main/resources/templates/sessionattrs/index.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4" lang="en">
+    <head>
+        <title>Session Scope in Spring MVC</title>
+        <meta charset="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+        <meta name="description" content="">
+        <meta name="author" content="">
+        <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet" 
+            integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
+    </head>
+    <body>
+    	<div class="container">
+    		<p>
+    			<h3>Session Scope in Spring MVC - Example</h3>
+    		</p>
+    	</div>
+        <div class="container">
+			<div class="row">
+				<div class="col">
+					<a href="/scopedproxy/form" class="btn btn-sm btn-primary btn-block float-right" role="button">Session Scoped Proxy Example</a></div>
+				<div class="col">
+					<a href="/sessionattributes/form" class="btn btn-sm btn-primary btn-block float-right" role="button">Session Attributes Example</a></div>
+			</div>
+        </div>
+    </body>
+</html>

spring-5/src/main/resources/templates/sessionattrs/scopedproxyform.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4" lang="en">
+    <head>
+        <title>Session Scope in Spring MVC</title>
+        <meta charset="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+        <meta name="description" content="">
+        <meta name="author" content="">
+        <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
+    </head>
+    <body>
+    	<div class="container">
+    		<p>
+    			<h3>Scoped Proxy Example</h3>
+    		</p>
+    	</div>
+        <div class="container">
+            <h5>Enter a TODO</h5>
+                <form action="#" th:action="@{/scopedproxy/form}" th:object="${todo}" method="post">
+                	<div class="input-group">
+                		<input type="text" th:field="*{description}" class="form-control" placeholder="TODO" required autofocus/>
+						<button class="btn btn-sm btn-primary form-control text-center" type="submit" style="max-width: 80px;">Create</button>
+                	</div>
+                </form>
+        </div>
+    </body>
+</html>

spring-5/src/main/resources/templates/sessionattrs/scopedproxytodos.html

@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4" lang="en">
+    <head>
+        <title>Session Scope in Spring MVC</title>
+        <meta charset="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+        <meta name="description" content="">
+        <meta name="author" content="">
+        <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" 
+            rel="stylesheet" 
+            integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" 
+            crossorigin="anonymous">
+    </head>
+    <body>
+    	<div class="container">
+    		<p>
+    			<h3>Scoped Proxy Example</h3>
+    		</p>
+    	</div>
+        <div class="container">
+        	<br/>
+        	<div class="row">
+        				<a th:href="@{/scopedproxy/form}" class="btn btn-sm btn-primary btn-block" role="button" 
+										style="width: 10em;">Add New</a>
+        	</div>
+        	<br/>
+        	<div class="row">
+        		<div class="col card" style="padding: 1em;">
+       				<div class="card-block">
+       					<h5 class="card-title">TODO List</h5>
+						<table>
+							<tbody>
+								<tr>
+									<th width="75%">Description</th>
+									<th width="25%" >Create Date</th>
+								</tr>
+								<tr th:each="todo : ${todos}">
+									<td th:text="${todo.description}">Description</td>
+									<td th:text="${#temporals.format(todo.createDate, 'MM-dd-yyyy HH:mm:ss')}">Create Date</td>
+								</tr>
+							</tbody>
+						</table>
+					</div>
+				</div>
+			</div>
+        </div>
+    </body>
+</html>

spring-5/src/main/resources/templates/sessionattrs/sessionattributesform.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4" lang="en">
+    <head>
+        <title>Session Scope in Spring MVC</title>
+        <meta charset="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+        <meta name="description" content="">
+        <meta name="author" content="">
+        <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
+    </head>
+    <body>
+    	<div class="container">
+    		<p>
+    			<h3>Session Attributes Example</h3>
+    		</p>
+    	</div>
+        <div class="container">
+            <h5>Enter a TODO</h5>
+                <form action="#" th:action="@{/sessionattributes/form}" th:object="${todo}" method="post">
+                	<div class="input-group">
+                		<input type="text" th:field="*{description}" class="form-control" placeholder="TODO" required autofocus/>
+						<button class="btn btn-sm btn-primary form-control text-center" type="submit" style="max-width: 80px;">Create</button>
+                	</div>
+                </form>
+        </div>
+    </body>
+</html>

spring-5/src/main/resources/templates/sessionattrs/sessionattributestodos.html

@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4" lang="en">
+    <head>
+        <title>Session Scope in Spring MVC</title>
+        <meta charset="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+        <meta name="description" content="">
+        <meta name="author" content="">
+        <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" 
+            rel="stylesheet" 
+            integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" 
+            crossorigin="anonymous">
+    </head>
+    <body>
+    	<div class="container">
+    		<p>
+    			<h3>Session Attributes Example</h3>
+    		</p>
+    	</div>
+        <div class="container">
+        	<br/>
+        	<div class="row">
+        				<a th:href="@{/sessionattributes/form}" class="btn btn-sm btn-primary btn-block" role="button" 
+										style="width: 10em;">Add New</a>
+        	</div>
+        	<br/>
+        	<div class="row">
+        		<div class="col card" style="padding: 1em;">
+       				<div class="card-block">
+       					<h5 class="card-title">TODO List</h5>
+						<table>
+							<tbody>
+								<tr>
+									<th width="75%">Description</th>
+									<th width="25%" >Create Date</th>
+								</tr>
+								<tr th:each="todo : ${todos}">
+									<td th:text="${todo.description}">Description</td>
+									<td th:text="${#temporals.format(todo.createDate, 'MM-dd-yyyy HH:mm:ss')}">Create Date</td>
+								</tr>
+							</tbody>
+						</table>
+					</div>
+				</div>
+			</div>
+        </div>
+    </body>
+</html>

spring-5/src/test/java/com/baeldung/sessionattrs/SessionAttrsApplicationTests.java

@@ -0,0 +1,16 @@
+package com.baeldung.sessionattrs;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class SessionAttrsApplicationTests {
+
+    @Test
+    public void contextLoads() {
+    }
+
+}

spring-5/src/test/java/com/baeldung/sessionattrs/TestConfig.java

@@ -0,0 +1,17 @@
+package com.baeldung.sessionattrs;
+
+import org.springframework.beans.factory.config.CustomScopeConfigurer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.support.SimpleThreadScope;
+
+@Configuration
+public class TestConfig {
+
+    @Bean
+    public CustomScopeConfigurer customScopeConfigurer() {
+        CustomScopeConfigurer configurer = new CustomScopeConfigurer();
+        configurer.addScope("session", new SimpleThreadScope());
+        return configurer;
+    }
+}

spring-5/src/test/java/com/baeldung/sessionattrs/TodoControllerWithScopedProxyTest.java

@@ -0,0 +1,68 @@
+package com.baeldung.sessionattrs;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.model;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.util.StringUtils;
+import org.springframework.web.context.WebApplicationContext;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+@Import(TestConfig.class)
+public class TodoControllerWithScopedProxyTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setup() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac)
+            .build();   
+    }
+
+    @Test
+    public void whenFirstRequest_thenContainsAllCategoriesAndUnintializedTodo() throws Exception {
+        MvcResult result = mockMvc.perform(get("/scopedproxy/form"))
+            .andExpect(status().isOk())
+            .andExpect(model().attributeExists("todo"))
+            .andReturn();
+
+        TodoItem item = (TodoItem) result.getModelAndView().getModel().get("todo");
+        assertTrue(StringUtils.isEmpty(item.getDescription()));
+    }
+
+    @Test
+    public void whenSubmit_thenSubsequentFormRequestContainsMostRecentTodo() throws Exception {
+        mockMvc.perform(post("/scopedproxy/form")
+            .param("description", "newtodo"))
+            .andExpect(status().is3xxRedirection())
+            .andReturn();
+
+        MvcResult result = mockMvc.perform(get("/scopedproxy/form"))
+            .andExpect(status().isOk())
+            .andExpect(model().attributeExists("todo"))
+            .andReturn();
+        TodoItem item = (TodoItem) result.getModelAndView().getModel().get("todo");
+        assertEquals("newtodo", item.getDescription());
+    }
+
+}

spring-5/src/test/java/com/baeldung/sessionattrs/TodoControllerWithSessionAttributesTest.java

@@ -0,0 +1,68 @@
+package com.baeldung.sessionattrs;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.model;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.util.StringUtils;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.servlet.FlashMap;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+public class TodoControllerWithSessionAttributesTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setup() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac)
+            .build();
+    }
+
+    @Test
+    public void whenFirstRequest_thenContainsUnintializedTodo() throws Exception {
+        MvcResult result = mockMvc.perform(get("/sessionattributes/form"))
+            .andExpect(status().isOk())
+            .andExpect(model().attributeExists("todo"))
+            .andReturn();
+
+        TodoItem item = (TodoItem) result.getModelAndView().getModel().get("todo");
+        assertTrue(StringUtils.isEmpty(item.getDescription()));
+    }
+
+    @Test
+    public void whenSubmit_thenSubsequentFormRequestContainsMostRecentTodo() throws Exception {
+        FlashMap flashMap = mockMvc.perform(post("/sessionattributes/form")
+            .param("description", "newtodo"))
+            .andExpect(status().is3xxRedirection())
+            .andReturn().getFlashMap();
+
+        MvcResult result = mockMvc.perform(get("/sessionattributes/form")
+            .sessionAttrs(flashMap))
+            .andExpect(status().isOk())
+            .andExpect(model().attributeExists("todo"))
+            .andReturn();
+        TodoItem item = (TodoItem) result.getModelAndView().getModel().get("todo");
+        assertEquals("newtodo", item.getDescription());
+    }
+
+}