Do not display 'Error:' on a successful logout in the 'session' example.

examples/session/src/main.rs

@@ -59,6 +59,9 @@ fn login_page(flash: Option<FlashMessage<'_, '_>>) -> Template {
     let mut context = HashMap::new();
     if let Some(ref msg) = flash {
         context.insert("flash", msg.msg());
+        if msg.name() == "error" {
+            context.insert("flash_type", "Error");
+        }
     }
 
     Template::render("login", &context)

examples/session/src/tests.rs

@@ -67,4 +67,15 @@ fn login_logout_succeeds() {
     let response = client.post("/logout").cookie(login_cookie).dispatch();
     let cookie = user_id_cookie(&response).expect("logout cookie");
     assert!(cookie.value().is_empty());
+
+    // The user should be redirected back to the login page.
+    assert_eq!(response.status(), Status::SeeOther);
+    assert_eq!(response.headers().get_one("Location"), Some("/login"));
+
+    // The page should show the success message, and no errors.
+    let mut response = client.get("/login").dispatch();
+    let body = response.body_string().unwrap();
+    assert_eq!(response.status(), Status::Ok);
+    assert!(body.contains("Successfully logged out."));
+    assert!(!body.contains("Error"));
 }

examples/session/templates/login.html.hbs

@@ -11,7 +11,7 @@
      <p>Please login to continue.</p>
 
       {{#if flash}}
-         <p>Error: {{ flash }}</p>
+         <p>{{#if flash_type}}{{flash_type}}: {{/if}}{{ flash }}</p>
       {{/if}}
 
       <form action="/login" method="post" accept-charset="utf-8">