March 2008 - Jimmy Bogard - Los Techies : Blogs about software and anything tech!

PTOM: The Dependency Inversion Principle

The Dependency Inversion Principle, the last of the Uncle Bob "SOLID" object-oriented design principles, can be thought of the natural progression of the Liskov Substitution Principle, the Open Closed Principle and even the Single Responsibility...

Published Mon, Mar 31 2008 4:52 PM by bogardj

Filed under: PTOM

Stop creating custom delegate types

Note to OSS and framework developers: Please stop creating custom delegate types. Use the Action and Func delegates instead. The problem is that delegate types with the same signature are not convertible to each other. For example, none of these assignments...

Published Wed, Mar 26 2008 10:03 AM by bogardj

Filed under: C#

Looking for Extreme Programmers in Austin, TX

As was announced on Jeffrey's blog , Headspring is hiring Extreme Programmers . We have several positions to fill, so if you're interested in joining the leading agile consulting company in Austin , please apply through our job posting . We're...

Published Tue, Mar 25 2008 2:50 PM by bogardj

Filed under: Misc

Variations on a Func-y theme

Delegates have come a long way since C# 1.0 debuted back in early 2002. The progression from using delegate parameters (outside of events) grew from quite cumbersome to fairly expressive with Lambda expressions with C# 3.0. Functional style programming...

Published Sat, Mar 22 2008 1:15 PM by bogardj

Filed under: C#

Is your process dead?

Two of the conventional criteria for exhibiting life are: Adaptation Response to stimuli Together these combine into the ability to respond to outside forces. So how do we know if your process is dead? If your team or organization: Does not elicit feedback...

Published Thu, Mar 20 2008 7:31 PM by bogardj

Filed under: Agile

Controller bloat?

Some of my background information first: 2 years classic ASP (ASP 3.0) 5 years ASP.NET 1-2 months MonoRail 10 minutes ASP.NET MVC ~45 seconds Ruby on Rails That's the sum of my experience with different web application frameworks. Obviously it's...

Published Wed, Mar 19 2008 10:44 PM by bogardj

Filed under: MonoRail, ASP.NET MVC

Mapping options in LINQ to SQL

A recent thread on the ALT.NET message board asked: How does everyone create the DataContext for their DB? Do you use the IDE and generate your custom .dbml (which also generates all your DTO's)? Do you use a generic DataContext object and just .GetTable<>...

Published Tue, Mar 18 2008 10:15 PM by bogardj

Filed under: Domain-Driven Design, LINQ to SQL

Review - xUnit Test Patterns

I consider one of the measures of quality of a book to be the number of personal assumptions challenged by its material. To that point, Gerard Meszaros' xUnit Test Patterns did not disappoint. Perhaps the biggest assumption was a dogmatic view of...

Published Sun, Mar 16 2008 10:15 PM by bogardj

Filed under: TDD

Clearing up the Mock confusion

There's some bad blood concerning Mocks, and a lot of it rightfully so. Because of popular mocking frameworks, the name "Mock" has become interchangeable for "Test Double". In Texas, we ask for a Kleenex, not a tissue, and a Coke...

Published Thu, Mar 13 2008 9:57 PM by bogardj

Filed under: TDD

Advanced mocking: mocks and stubs

Test Spies can help us verify the indirect outputs of a system under test. If an OrderProcessor needs to send an email, we don't want that test sending real emails, so we set up a Test Spy to capture that indirect output so we can verify it inside...

Published Wed, Mar 12 2008 10:16 PM by bogardj

Filed under: TDD

A small correction

During a conversation at this week's ADNUG , I realized the title of one of my latest posts ( Advanced mocking: auto-interaction testing ) had a misleading title. I was trying to be clever with the Greek "auto" meaning "self",...

Published Tue, Mar 11 2008 7:52 AM by bogardj

Filed under: Misc

The many faces of ExpectedException

I'm not a fan of the style most xUnit frameworks suggest for verifying exceptions. After seeing the problems with using an attribute to perform assertions, many frameworks have come up with their own way of their own way of doing it. Outside using...

Published Mon, Mar 10 2008 10:25 PM by bogardj

Filed under: TDD

Advanced mocking: anonymous test spy

When practicing TDD, I create interfaces to abstract away the ugly stuff, like databases, file I/O, web service calls, email messages, and other external systems. I can run tests now that don't have to interact with real implementations of these external...

Published Thu, Mar 06 2008 10:43 PM by bogardj

Filed under: Testing, TDD

Advanced mocking: auto-interaction testing

When dealing with legacy systems or those not designed with specific testability scenarios in mind, you have to test your changes in non-traditional means. In normal mocking (or test double ) scenarios, you have some kind of external dependency that you...

Published Wed, Mar 05 2008 9:44 PM by bogardj

Filed under: Legacy Code, Testing, TDD

Letting the customer drive the demo

At the end of an iteration, we have a demo to the customer (and any interested stakeholders) of functionality delivered in that iteration. Something I hadn't tried until recently was letting a user or customer drive the demo. There were some minor...

Published Sun, Mar 02 2008 10:01 AM by bogardj

Filed under: Agile

March 2008 - Jimmy Bogard

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PTOM: The Dependency Inversion Principle

Stop creating custom delegate types

Looking for Extreme Programmers in Austin, TX

Variations on a Func-y theme

Is your process dead?

Controller bloat?

Mapping options in LINQ to SQL

Review - xUnit Test Patterns

Clearing up the Mock confusion

Advanced mocking: mocks and stubs

A small correction

The many faces of ExpectedException

Advanced mocking: anonymous test spy

Advanced mocking: auto-interaction testing

Letting the customer drive the demo