Skip to main content

JavaScript, Unit Test, Visual Studio and Build Machine Integration

Today I will write a short post about JavaScript and unit testing. I heard a lot of .NET developers that they didn’t wrote code for JavaScript because is not supported by Visual Studio, is complicated to run it on the build machine or they don’t have time.
Guys, I have news for you, Visual Studio 2012 supports unit tests for JavaScript, even Visual Studio 2010. You can run them almost like a normal unit test for C# without needing to install anything. The JavaScript unit tests are so smart that are integrated in a way that you don’t need to change/install anything on your build machine – you even receive the standard message notification when a unit test fail. You don’t have time for them – I will not comment this, definition of DONE is wrong for those developers.
When I need to write unit tests for JavaScript code I usually prefer qunit. Why? Because in combination with a small NuGet package called NQunit you can make magic.
qunit give you the possibility to write and run JavaScript unit tests. This is a simple testing framework. The output of running unit tests is a XML that can be parsed, used by build machine or any other machine. More about qunit:
NQunit makes the integration between classic unit tests for C# and JavaScript code. Using this package you will have the possibility to run unit tests written in JavaScript like normal unit tests. I prefer it because you can use it with success in Visual Studio 2010 also, not only in Visual Studio 2012. One nice feature of this package is the way is integrated with the build machine. Because this package runs normal unit tests you don’t have to change anything on the build machine or to install something on developers’ machine.
The secret of NQunit is the way how it run the tests. He takes from the output folder of the HTML files that were added and run them in a browser. For each of them, he capture the XML that is generated after the test run. The XML that is generated by qunit contains the summary of the test result and can be used to get all the information that are needed. At the end, NQunit will close the browser.
public static IEnumerable<QUnitTest> GetTests(params string[] filesToTest)
Using this method you can specific all the files you want to test. Don’t worry, when you will start to use NQunit you will see that there is a great sample on NQUnit that is preconfigured.
Hints before you start:
   Don’t run the tests from ReSharper, ReSharper don’t run the tests as you expect – because the way how each session of tests runs and access the rest of the output build.
               If more then one unit test from JavaScript fails, you will only receive information related to that only one unit-tests – this can be fixed writing some C# code, but I can live with it.
               If you have JavaScript code then write some Unit Tests.
I started to use this NuGet package one year ago and it works great. For more information about this great package:


Popular posts from this blog

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

How to check in AngularJS if a service was register or not

There are cases when you need to check in a service or a controller was register in AngularJS.
For example a valid use case is when you have the same implementation running on multiple application. In this case, you may want to intercept the HTTP provider and add a custom step there. This step don’t needs to run on all the application, only in the one where the service exist and register.
A solution for this case would be to have a flag in the configuration that specify this. In the core you would have an IF that would check the value of this flag.
Another solution is to check if a specific service was register in AngularJS or not. If the service was register that you would execute your own logic.
To check if a service was register or not in AngularJS container you need to call the ‘has’ method of ‘inhector’. It will return TRUE if the service was register.
if ($injector.has('httpInterceptorService')) { $httpProvider.interceptors.push('httpInterceptorService&#…

Fundamental Books of a Software Engineer (version 2018)

More then six years ago I wrote a blog post about fundamental books that any software engineer (developer) should read. Now it is an excellent time to update this list with new entries.

There are 5 different categories of books, that represent the recommended path. For example, you start with Coding books, after that, you read books about Programming, Design and so on.
There are some books about C++ that I recommend not because you shall know C++, only because the concepts that you can learn from it.


Writing solid codeCode completeProgramming Pearls, more programming pearls(recommended)[NEW] Introduction to Algorithms


Refactoring (M. Fowler)Pragmatic ProgrammerClean code[NEW] Software Engineering: A Practitioner's Approach[NEW] The Mythical Man-Month[NEW] The Art of Computer Programming


Applying UML and Patterns (GRASP patterns)C++ coding standards (Sutter, Alexandrescu)The C++ programming language (Stroustrup, Part IV)Object-oriented programming (Peter Coad)P…