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CategoryTesting

Create mocks with mockito

By Adrian Elsener
In Agile, Java, Test Driven Development, Testing
June 25, 2010
3 Min read
C

This is a small summarization what the differences are between the different variations creating mocks with mockito. Null values (default) Per default, after creating a mock, every method will return null. Just create your mock with: I think, this is very useful and straight forward. (And based by mockito developers idea, to create very fast a mock for testing). Sometimes it is very difficult to determine an error which was produced through such a null value. For this case it is very...

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Moq suggestions: SetupSequentials

By Daniel Marbach
In .NET, Testing
November 26, 2009
2 Min read
M

I must say I’m really a huge fan of Moq. Moq is steady growing and the developer community is quite impressive in inventing new features and extensions. I recently ran over a nice feature suggestion placed in a private branch from moq. The branch belongs to Brian J. Cardiff. I suggest you check also his blog out! The feature brain suggested is an extension method which allows to do sequential setups. The sequential setup allows to specify in a fluent way for example different return types...

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How to find a concurrency bug with java?

By Daniel Schröter
In Java, Methodology, Testing
August 25, 2009
7 Min read
H

How to find a concurrency bug – this was the question I asked myself some time ago. It is always very hard to find a concurrency bug. Mostly you have no idea when it happens or if it is really a concurrency issue or some nasty bit of code. If it is a concurrency issue the question is if the bug is in your code or in a supplied library? Will the problem happen only on multicore processors or on any machine? Besides the technical problem the customer is eager to get a solution and...

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Mocking Adventures with NMock2: Stubs Advanced

By Urs Enzler
In .NET, Software, Testing, Uncategorized
August 11, 2009
4 Min read
M

NMock2 is a library for assisting test driven development of .NET code by providing a dynamic mock object creation framework.
In my last post on NMock2, I introduced the new Stub feature of NMock2 and its basic usage. In the second part, we are going to have a look at the advanced possibilities of the Stub mock style:

Define Mock Style Of Nested Mocks
Define Default Values

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Mocking Adventures with NMock2: Stubs

By Urs Enzler
In .NET, Software, Testing
August 2, 2009
4 Min read
M

NMock2 is a library for assisting test driven development of .NET code by providing a dynamic mock object creation framework. In this article, I’m going to show you the basics of the new stub feature in NMock2. Note that this feature is currently only available on the development trunk in the subversion repository at . Therefore, the features discussed here may change for the next official release. Stubs can be used in scenarios where you have to test an instance of a class (let’s call this...

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Passive View Command (PVC) Pattern

By Urs Enzler
In .NET, Architecture, Testing
April 8, 2009
3 Min read
P

When I’m coaching teams in Test Driven Development (TDD), I’m often asked how to deal with the User Interface (UI). The problem is that the unit test frameworks are weak in testing Forms, Controls, Buttons, Grids, and so on. Weak because they do not support it at all or the tests become very fragile (e.g. renaming a Label causes the test to fail).
We address this problem with the Passive View Command pattern, PVC for short.

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Mockito

By Adrian Elsener
In Java, Testing
April 6, 2009
2 Min read
M

A few weeks ago, I started using Mockito. Mockito is a mocking framework for Java.
What mockito is able to do:
– mocking interfaces and abstract classes
– mocking concrete classes
– spy real objects
()
I liked mockito so much that I decided to present it to you…

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NMock2 is fast. Really fast!

By Urs Enzler
In .NET, Announcement, Software, Testing
March 16, 2009
1 Min read
N

Andrew Kazyrevich published a post containing timing comparisons of Moq, Rhino Mocks, Isolator and NMock2.
And NMock2 – although still lacking some features – is very fast compared to the competitors. Woohoo!
I’m curious how the newly introduced features (mock classes, non-strict and recursive mocks) will change in this setup. I’ll check that out as soon as I find some time :-O
If you want to check the new features (alpha!) yourself then here is the svn URL:
Happy mocking!

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Why should I write tests?

By Adrian Elsener
In Testing
January 21, 2009
2 Min read
W

Often I get asked: Why should I write a test. What should I answer? My preferred answer is: It’s an insurance to you. At the time you have tests for your code, somebody else can do modifications on your code and you are sure it still does what it should. Otherwise your test will fail. (Well some people think: Why should somebody else modify my code? That’s impossible, this code is too complex, as it can be modified by somebody else… But this is another story.) I also like the...

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