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@DNNConDon’t forget to include #DNNCon in your tweets!
Effective Unit Testing for DNNJames McKee
Solutions Developer / Enterprise Architect
@punkcoder
@DNNConDon’t forget to include #DNNCon in your tweets!
THANKS TO ALL OF OUR GENEROUS SPONSORS!
@DNNConDon’t forget to include #DNNCon in your tweets!
• Almost 10 years working .NET• Consultant 7 years
• 7 Companies in the Fortune 100• 10 total in the Fortune 500
• Currently with BlueBolt Solutions• Enterprise Architect for Bravo-Squared
Software• Run Punk-Coder.com• New to the DNN Scene
About Me
@DNNConDon’t forget to include #DNNCon in your tweets!
So to gauge the audience:• Know what unit tests are?• Realize that unit tests are something
that you write not something you do?
• Think that they are a great idea but something that you don’t have time for?
Questions
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• Unit Tests are hard• Unit Tests are for people who don’t know
how to program.• My project isn’t big enough to need unit
tests.• I’m the only one working on my project.• My client doesn’t pay for unit tests.• We are on a compressed time line, we
don’t have time for unit tests.
Reasons People Don’t Unit Test
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Why Unit Testing is Important
More Infromation: https://blogs.msdn.com/b/dotnet/archive/2011/09/26/compatibility-of-net-framework-4-5.aspx?Redirected=truehttps://blogs.msdn.com/b/dotnet/archive/2012/10/17/net-framework-4-5-off-to-a-great-start.aspx?Redirected=true
@DNNConDon’t forget to include #DNNCon in your tweets!
• Unit Test as a function of code• Unit Test vs. Functional Test
What is a unit test?
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This is a Unit Test
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DEMO ! (HELLO WORLD!)
@DNNConDon’t forget to include #DNNCon in your tweets!
Major implementations should interact through the veil of an interface.• Programming to an interface improves
modularity.• It encourages looser coupling.• Mocking classes can get complicated.
It’s just good design!
Interface based programming
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An artificial object that mimics the behavior of a complicated class for the purpose of simplifying testing.
Example:• You would mock the following in your
tests:• Database Calls• File System Calls• Web Service Calls
Mocks
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• Many of the interaction points for modules and scheduled tasks are complicated and do not supply Interfaces.
• Functionality such as database access requires instantiation of classes originating from DNN.
Unit Testing in DNN
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• Ninject is a lightweight, full featured IoC container for use with dependency injection.
• Open Source• Available at http://www.ninject.org/
Ninject to the Rescue
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• To make the application more testable we will create 2 Standard Kernels that will be responsible for filling dependencies:
• In production code we will use the real kernel
• In testing we will use the testing kernel to return mock objects.
• In scheduled tasks this will be inserted at the beginning of custom code.
• In views the presenter will be instantiated from Kernel
Building Interfaces at Boundaries
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• Because of state some objects don’t work well with direct instantiation.
• DataContext is a good example. Reusing a data context for multiple calls can result in a time out, that leads to exception, which leads to GC.
• To avoid this create factory classes that produce instance classes.
Building Factories for Instance Objects
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Demo! The Skeleton
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• NUnit• xUnit, spiritual successor to NUnit• MBUnit• Visual Studio Built-In
• Suffers from problems related testing x86/x64 in the same project.
• Integrates well with performance testing and can use unit tests for load testing
Unit Testing Frameworks and Tools
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• Build automation• Code Coverage• Performance testing
Where to go from here
@DNNConDon’t forget to include #DNNCon in your tweets!
• When it comes to unit testing, there is a very fine line between code reuse and masking issues.
• If possible write your code as test driven, this will produce leaner code.
• Aim for the 90% mark, but 80% is the accepted boundary.
• Use asserts carefully, make sure that what you are asserting is the actual correct behavior.
Best Practices
@DNNConDon’t forget to include #DNNCon in your tweets!
Twitter: @punkcoderemail: [email protected] work: [email protected]
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