Faking System.DateTime.Now

For sure: The rent is too damn high!

And if we are writing Unit Tests, we are often paying a damn high price, too! Let’s look at a inconspicuous property that every .NET programmer is using:

System.DateTime.Now

Getting the current time is really easy. But how can we mock that statement for our tests?!

Solution 1

The first solution would be the usage of our favorite dependency injection framework. We would write a wrapper for DateTime.Now and produce an interface like this:

public interface IDateTime
{
    DateTime Now { get; }
}

Here is a second test exam for you.
Sascha will explain this paper today (2011-01-31), in his training course.

Download: Test-Exam RIA 2

StackOverlowExceptions caused by recursive calls are evil bugs.

While developing on your local machine you have a high chance to jump right into the buggy line of code by attaching Visual Studio to the process. I’m talking about ASP.NET websites, so in my case it’s the w3wp.exe process.

But as soon as your code goes live your debugging possibilities are limited. Of course, you can do remote debugging with Msvsmon.exe, but you still need to know where to look at.* It’s a fact: Software-Bugs successfully hide themselves from developers. So as long as you hunt them, they won’t appear. Instead they like it to scare principals or end customers. For obvious reasons these peoples won’t provide you with a Strack Trace that could help you.

Here is a test exam for you. Sascha will explain this paper today (2011-01-17), in his training course.
If you are not attending his training course, you will get a second change to discuss the exam at Wednesday (2011-01-19).
As you already know, the exam will be at Wednesday, the 26^th of January (2011-01-26) at 9:30 am (Tower 91 & 92).

Download: Test-Exam RIA

Für die Anwaltskanzlei Westphal habe ich eine kleine Windows Phone 7 App entwickelt.

Der Rechner ermöglicht die Berechnung des pfändbaren Einkommens unter Berücksichtigung der jeweils aktuellen Pfändungstabelle. Im Fall einer Privatinsolvenz wird dieser Betrag für die Dauer von maximal 6 Jahren vom Treuhänder oder Insolvenzverwalter monatlich eingezogen:

Was viele Leute nicht wissen: hat man mehrere Kinder, so wird sehr oft gar nichts gepfändet. Sich zu Informieren lohnt also!

Natürlich bietet sich es auch an, durch eine Schuldenberatung eine Insolvenz komplett zu vermeiden.

Kostenloser Download

Free

Pfändungsrechner

Sie haben Schulden? Ermitteln Sie mit dem Pfändungsrechner, wie sich ihre finanzielle Situation im Falle einer Privatinsolvenz verändern wird.

Some easy stuff for the end of the RIA-series.

I focused on two important trends: “Cloud Computing” and “Rich Internet Applications”. I want to show you the very basics of graphical RIA / AJAX patterns, which are all related to experienced graphical user interfaces, too.

[ENGLISH] I found this presentation on my disk. It’s an introduction to the art of simple and effective web design. The slides are in German only.

@My Students: FYI! This is just for your interest!
(not for the exams ;-))

[DEUTSCH] Ich habe diese Präsentation aus dem Jahre 2009 auf meiner Festplatte entdeckt. Sie führt in meine Grundsätze für ein schlichtes und effektives Webdesign ein. Inhalte sind Kompositionslehre, Effizienz und Schlichtheit und besucherspezifische Kommunikation.

I created a project page for the
ADO.NET Unit Testable Repository Generator at
http://repositorygenerator.codeplex.com/.

You want to contribute?

Then welcome to the party! 8-)
I would be happy to see your patches, your feedback or maybe even some more documentation! :roll:

Here are all resources that were published so far:

• Introduction
• Walkthrough
• Presentation about Unit Testing
• Demo solution

Let us welcome Rohan Cragg as the first contributor to the project!
(he found a bug where broken code was generated)

@All people who keep this project active:
Thank you very much!

In the last weeks I played intensively with the Windows Phone 7 SDK.
I uploaded more than 10 mini-apps to the marketplace. Most of them are just funny or solve one special task.
Give them a try, some of them are free or have the lowest possible price!

$0.99

Ultimate Fart Button

This is the ultimate fart app. 20 + 1 farts are just one fingertip away. Lay back, tap the screen and enjoy the show. You will get the full user experience.

Here we go: