The "Music Store" web application does use only the "ViewBag" so we will write some tests for it. The "ViewData " and the "TempData" use similar syntax."Music Store" "ViewBag" "ViewData "TempData"
Let's test something simple - the HTTP Get overload of the "Login" action in the "AccountController" :"Login" "AccountController"
We need a new dependency (again?!) - "MyTested.AspNetCore.Mvc.ViewData" :"MyTested.AspNetCore.Mvc.ViewData"
We need to add the "ViewData" features, because the "ViewBag" is actually a dynamic version of it ."ViewData"
I hope you remember how we tested session and cache. Well, the "ViewBag" ( "ViewData" and "TempData" too) is no different:
Let's write another one - for the HTTP Get overload of the "Create" action in "StoreManagerController" :"Create" "StoreManagerController"
And our test:
The "ContainingEntries" call is equivalent to this one:"ContainingEntries"
Both methods will validate whether the total number of entries in the "ViewBag" is equal to the total number you provide in the test. For a sanity check - remove the "ArtistId" property from anonymous object and run the test again:"ArtistId"
If you do not want the total number of entries validation, just use:
"ViewData" have the same API:
"TempData" too, but you will need the "MyTested.AspNetCore.Mvc.TempData" package:"MyTested.AspNetCore.Mvc.TempData"
Additionally, you can populate the "TempData" dictionary before the actual action call:
We saw how easy it is to test with "ViewBag" , "ViewData" and "TempData" . Their fluent assertion APIs are very similar to the "Session" and "Cache" ones. But enough about controllers, let's finally move on to View Components !"Session" a function is nullipotent if not calling it at all has the same side effects as calling it once or more
Here’s a list of the most commonly used HTTP methods and whether they are idempotent and/or safe as defined by the contract:
Idempotency and safety (nullipotentcy) are
that server applications make to their clients and the world. It is a
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standard that developers must adhere to when implementing RESTful APIs over HTTP. An operation doesn’t automatically become idempotent or safe just because it is invoked using the
method, if it isn’t implemented in an idempotent manner. A poorly written server application might use
methods to update a record in the database or to send a message to a friend (I have seen applications that do this.) This is a really, really bad design.
Adhering to the idempotency and safety contract helps make an API fault-tolerant and robust
. Clients, middleware applications and various servers that requests pass through before reaching your application,
use this contract for various optimizations
. Clients may automatically cancel a
request if it is taking too long to process and repeat it because they assume it has the same effect (since
is idempotent). However, they won’t do the same thing for
requests because the first one may have already altered some state on the server side. This is the reason why web browsers display a warning message that you are about to re-submit a form when you hit the back button to go to a form (For this reason, always redirect after a successful
operation.) In the same veins, cache servers
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POST requests and safe methods can pre-fetched to stored in cache to enhance performance.
In summary, when building RESTful applications using HTTP, it is important to implement HTTP methods in a manner that
satisfies their idempotency and safety contract, because clients and intermediaries are free to use this contract to optimize and enhance the user experience
. Don’t use
method for operations that alter the database and don’t use
to retrieve information (
with one exception
Professor Eric R. Carpenter has been recently quoted in a Think Progress publication entitled: “One military reporting error means tens of thousands could buy guns illegally”.
Professor H. T. Smithrecently gave the Keynote Address at the Black History Month Celebration by the United States Attorney’s Office for the Southern District of Florida.
Professors Louis Schulze and Raul Ruiz recently contributed to future programming at the 2019 AALS annual meeting.
Prof. Howard Wasserman published two pieces on the widely read SCOTUSBlog.
Prof. M.C. Mirow has been appointed a fellow at the Center for the Study of Law and Religion at Emory University School of Law.
Manuel A. Gómez Associate Dean for International and Graduates Studies Associate Professor of Law 305.348.1158 [email protected]
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Hein Author Profile SSRN Author Page Bibliography
Manuel A. Gómez is Associate Dean of International and Graduate Studies and Associate Professor of Law at Florida International University College of Law where he regularly teaches courses on Complex Litigation, International Arbitration, Alternative Dispute Resolution, Law and Society, and Introduction to International and Comparative Law, with emphasis on Latin America. Professor Gómez also has law teaching experience at other US universities such as Stanford and Iowa, and has been at numerous Latin American, European, and Asian universities, either as guest lecturer, speaker or visiting professor. Professor Gómez’s research and academic writing focuses on dispute resolution and governance, legal and institutional reform in Latin America, the globalization of the legal profession, and innovations in legal education. More specifically, professor Gómez studies the use of different dispute resolution mechanisms and fora in an array of contexts, ranging from transnational litigation and international arbitration, to domestic litigation and other non-institutionalized mechanisms. He is also an expert on institutional and legal reform in Latin America, and is also interested in the globalization of lawyers, the role of Judges, and innovations in legal education. Professor Gómez has also served as legal expert in the context of domestic and transnational litigation, and International Arbitration proceedings in the US and Latin America. He is a founding member of the Miami International Arbitration Society (MIAS), member of the Faculty Council of the International Law Section of the Florida Bar,member of the Academic Councilat the Institute of Transnational Arbitration(ITA), and member of the Academic Council of the Latin American and Caribbean Center at FIU, among others.
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