Contents tagged with Agile
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Mscorlib mocking minus the attribute
Mocking .net framework members (a.k.a. mscorlib) is always a daunting task. It’s the breed of static and final methods and full of surprises. Technically intercepting mscorlib members is completely different from other class libraries. This is the reason it is dealt differently. Generally, I prefer writing a wrapper around an mscorlib member (Ex. File.Delete(“abc.txt”)) and expose it via interface but that is not always an easy task if you already have years old codebase.
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Fake a member without passing the instance via dependency
I have came across this several times in forum (telerik) on how I can really fake an item yet I don’t want to pass the instance as an argument. Ideally, this is not a best design but there are third- partly libraries that you have little control over how its written. Anyway, whatever the case might be. This post will show you how you can achieve the above using JustMock. I will be using MSpec in conjunction for the example.
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Mocking constructor
While unit testing a target type, it is likely that the test is failing during object creation because we forgot to include a mandatory configuration file or a line in the constructor is throwing exception because it is making call to some external service or data store which on the other hand requires a little more orchestration to get things going . To better illustrate this, let’s create an entity framework data container either new or from an existing database. Once we have completed the required steps, there will be an entry-point class where we will notice the following default constructor:
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How to raise event for a mocked call.
Recently, while i was working with a support issue , i found this interesting piece of test code that i would like to share here. This is actually written by Stefan Lieser (clean code developer from Germany forwarded to me by Jan from Telerik Germany). As the title states, it is to mock a specific event for an expected call.
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Back to school : Getting to know F#
This post starts with a basic introduction of F# and finally ends up writing a simple unit test for an F# member. For those who don’t know what F# is all about, Its a product from Microsoft research and now part of VS 2010 family. Actually from Wikipedia it is described as follows:
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Hands on mocking of ASPNETMVC controller action
In this post, i will start with an MVC sample created from the default template project that is bundled with ASPNET MVC2 installation. This template provides not just a dummy project with folder organized but rather a full running app.The target of this post is to show a mocking of a controller action, in that regard i have picked registration action chosen from the accounts controller of the provided sample that looks similar to:
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Adding custom interfaces to your mock instance.
Previously, i made a post showing how you can leverage the dependent interfaces that is implemented by JustMock during the creation of mock instance. It could be a informative post that let you understand how JustMock behaves internally for classes or interfaces implement other interfaces into it. But the question remains, how you can add your own custom interface to your target mock. In this post, i am going to show you just that.
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Mocking successive calls of similar type via sequential mocking
In this post , i show how you can benefit from sequential mocking feature[In JustMock] for setting up expectations with successive calls of same type. To start let’s first consider the following dummy database and entity class.
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Is your test method self-validating ?
Writing state of art unit tests that can validate your every part of the framework is challenging and interesting at the same time, its like becoming a samurai. One of the key concept in this is to keep our test synced all the time as underlying code changes and thus breaking them to the furthest unit as possible. This also means, we should avoid multiple conditions embedded in a single test.
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Mocking property sets
In this post, i will be showing how you can mock property sets with your expected values or even action using JustMock. To begin, we have a sample interface: