site helps to check your web page for browser compatibility by providing cross platform browser testing in form of taking screenshots of your web page in all kinds of browsers/OSes. It supports seemingly everything there is out there (main page has something like 100 checkboxes for various browsers) and you can customize all kinds of options like screen resolution, Java version, etc. It is a free service, but there is an option to get “priority lane” for money.

UPDATE Just found 10 Browser Testing Tools: Roundup for Web Designers by Bryan Connor – a nice collection of browser testers with short reviews.


Microsoft DevLabs

On the DevLabs site you read: “Any truly remarkable software innovation that introduces a paradigm shift is based on solid inventive ideas. But it also needs discussion, trial, collaboration, and a critical eye. Explore the projects that we are experimenting with in our labs, and let us know if they inspire you.”

Currently there are four projects there:

  • Popfly, a “fun, easy way to build and share mashups, gadgets, games, Web pages, and applications”
  • Small Basic, a “simple and easy programming language with a friendly environment that provides a cool and fun way of learning programming”
  • Pex, an “intelligent assistant to the programmer”
  • CHESS, a “concurrency testing tool for finding and reproducing concurrency Heisenbugs in your code. CHESS can find assertion violations, deadlocks, livelocks, data-races, and memory-model errors. CHESS works both for managed and for unmanaged code”

Mocking Frameworks

Today was Sunday and I took a “day-off” from the project :) and decided to look into the world of mocking… Before I start, I should admit, that while I understand (or at least I hope so) principles and benefits of Test Driven Development (TDD) and mocking, I have never used them in my work. There are a few reasons for this:

  1. Currently I am developing a digital TV feature and infrastructure for an advanced set-top box (running on Windows XP Embedded), and simply do not get how I can use TDD and mocking with needs like processing 25-40+ megabit transport streams and doing something useful with them. The code that I would be able to test using TDD and mocking is way too simple for this, and the code I perhaps would be interested in testing automatically, is not really “testable” for the abovementioned reasons.
  2. Unit testing and mocking frameworks for C++ and C++/CLI, the two languages I use 80% of my time nowadays, are quite “anemic” at best, and it is really no fun to use anything like those frameworks.
  3. On top of that, to be honest, I never felt the need to use TDD and mocking in my own practice. Retrospectively thinking, I do not remember any project where TDD or mocking would substantially improve the quality of my code and/or reduce the number of defects (although I definitely know cases where it would not harm to use TDD and mocking) – I am not “boosting” myself, but there is an order of magnitude difference in performance among developers, and even bigger difference in quality of the code they write. In fact, I think TDD and mocks were invented to somehow compensate for this difference.
  4. I somehow have a weird feeling about adding to my project as much testing/mocking code as there is “normal” code. And then, I am definitely not “purist” but rather “pragmatic” – I agree that it might be wise to have unit testing/mocking in some parts of the system, but definitely not everywhere.

So, now that I explained my background, I am ready to continue. After spending quite much time on Google and other development-related sites I managed to narrow the list of available .NET mocking frameworks down to three: Typemock Isolator, Rhino Mocks, and Moq. All frameworks support .NET 3.5 (Rhino has it in version 3.5 RC).

Typemock is definitely the most powerful of these frameworks, but this property of Typemock is often mentioned in the cons section. The argument is, that while allowing mocking everything and everywhere, Typemock is not really helping developers to design loosely coupled code – for example, you do not have to “resort” to Inversion of Control (IoC) principle to use Typemock. I think Typemock is as its best when you try to introduce TDD and mocking into legacy project to get better understanding of that code and to have easier time modifying it. The framework has a free version, but to get e.g. its Natural Mocks feature (allowing to define expectations by recording them in a type-safe manner) you will have to cash out 349€ for Professional or 449€ for Enterprise editions.

Rhino Mocks is likely the most used .NET mocking framework. The framework looks quite powerful, is type-safe, supports generics, and is actively developed.

Then, there is Moq – a newcomer to the scene. Some people criticize it for being too simple. Some accuse it of not being “pure”. From what I have seen today, I should say that I liked it most (second being Rhino). It has rather elegant type-safe API built around lambda expressions. This API allows writing shorter and more concise code than Rhino does. What sets Moq apart from other mocking frameworks is that it is not using the record/playback model.

I will definitely give TDD and mocking a try on my next project. On the other hand, my C++ part of our current project is much smaller than our C#/.NET 3.5/WPF code-base, so I might introduce mocking into our current project if there will be not too big “opposition” from the development team and other project stakeholders – we are under heavy time pressure now, and adding some new concepts at this moment will probably introduce significant delays. I think that the framework of choice will be Moq, although it is just a gut-feeling at this moment.

And here is the list of interesting blogs/sites about the mocking:

googletest: Another C++ Testing Framework

Just few days ago I found WinUnit, and voilaz – here is googletest, Google’s xUnit-based multiplatform framework for writing C++ tests. Supports automatic test discovery, a rich set of assertions, user-defined assertions, death tests, fatal and non-fatal failures, various options for running the tests, and XML test report generation.

Software Testing and Related Things

By accident found Google Testing Blog. Not bad.

One of the articles is called How to Write 3v1L, Untestable Code – a must-read for newbie (and not newbie too!) programmers. Not on this blog, but nevertheless related article is How To Write Unmaintainable Code by Roedy Green – very serious collection of bad things despite it is very funny to read.