How to use Testcontainers with NET Unit Tests The .NET Tools Blog

If I would need this I would implement js clock which would report to server that user is on line. The first and the last record with the same session id would indicate time user spend on your site. And in the javascript function that I call onunload I call a web method by using pagemethods. Let’s use an existing Dockerfile to create and test an ASP.NET Core application. We found that the Dockerfile must be at the root of your solution for this approach to work correctly.

We’ll need a Fixture, a setup class for shared resources across tests to accomplish our goal. The drawback when working with dependency instances is that they can be a burden to manage and considerably slower than running tests in memory. Developers measure these tests in seconds while mocked tests in milliseconds. Generally, these tests can be more “accurate” and produce higher confidence levels, but they cost time and resources. Once dependencies are registered and added to the container, you should be able to retrieve the dependencies in your application and use them to invoke methods.

Configure a TinyIoC container in ASP.NET Core

ASP.NET is built on the CLR(Common Language Runtime) which allows the programmers to execute its code using any .NET language(C#, VB etc.). ASP.NET is a web application framework designed and developed by what is asp.net Microsoft. ASP.NET is open source and a subset of the .NET Framework and successor of the classic ASP(Active Server Pages). With version 1.0 of the .NET Framework, it was first released in January 2002.

• Once we’ve set up our test class, we can execute our test similarly to our previous examples.
• The tests are identical to the earlier examples, but now they run for a total of 6 times.
• ASP.NET applications are compiled, which means the code is translated into object code, which is then executed.
• You can find more examples of sites using ASP.NET in our ASP.NET market report, or you can request a custom web technology market report.
• Websites and applications built with ASP.NET can be faster and more efficient than a website build with PHP, for example.
• The complete source code of the Program.cs file is given below for your reference.

This strategy has the same issues as our previous strategy of Container-per-collection, so you’ll need to take appropriate precautions against mutating assumptions across tests. These tests are identical to the previous sample, except they now use the fixture instance across all runs. Running this test class, we now see that our tests run in about 9 seconds. That’s a 4-second improvement, which will scale as our test suite grows. We’ll leverage xUnit’s IAsyncLifetime interface to support async/await calls before and after each test.

Programming models

Mocking libraries allow developers to build a substitute for a dependency with behavioral assumptions. These calls can be intercepted in-process and handled in the scope of the test run. There are also some other technology like Java, PHP, Perl, Ruby on Rails, etc. which can be used to develop web applications. The web applications which are developed using the .NET framework or its subsets required to execute under the Microsoft Internet Information Services(IIS) on the server side. The work of IIS is to provide the web application’s generated HTML code result to the client browser which initiates the request as shown in the below diagram.

However, with the release of ASP.NET Core in 2016, ASP.NET applications are no longer reliant on IIS and can now be hosted on Linux and MacOS as well as Windows. Interpreted code is not directly executed by the machine, but must be read and interpreted each time before being executed. Compiled code is usually faster and more scalable than interpreted code, and can do anything interpreted code can do. If you’re new to Testcontainers or unit testing in general, We’d love to hear your questions below. If you’re a longtime user, We’d also love to read about your strategies for increasing confidence in your tests while keeping execution of test suites fast.

Create an ASP.NET Core Web API project in Visual Studio 2022

It is part of Microsoft’s .NET platform and is the successor to Microsoft’s Active Server Pages (ASP) technology. ASP.NET is an open-source,[2] server-side web-application framework designed for web development to produce dynamic web pages. It was developed by Microsoft to allow programmers to build dynamic web sites, applications and services. The name stands for Active Server Pages Network Enabled Technologies. While not a complete set of all Testcontainer features, We’ve outlined some common approaches for your unit tests. As mentioned, all these Testcontainer samples are available on a GitHub repository so that you can try them out in your development environment.

For .NET developers, we don’t see the advantages to this approach unless you have container-specific dependencies that must run within the container. That said, Testcontainers provides a full-featured set of APIs that allow this approach to be possible, and you should evaluate its usefulness based on your use cases. These libraries provide an out-of-the-box experience tailored for each dependency. The libraries can make the transition from mocks to container-based testing more straightforward.

Inversion of control and dependency injection

We’ll use xUnit as my testing framework for the following examples, but these samples will also work in NUnit. Also, to create web applications ASP.NET provide the 3 development styles which are ASP.NET Web Pages, ASP.NET MVC, Web Forms. Both technologies enable computer code to be executed by an Internet server.

ASP.NET Core is a new version of ASP.NET that runs on every major computing platform, including Windows, MacOS and Linux. Like ASP.NET, it is open source, created by Microsoft and allows developers to create web applications, web services, and dynamic content-driven websites. First released in 2016, ASP.NET Core is relatively new, but has already received a 2.0 release and is now a stable alternative to Windows-hosted ASP.NET web applications. Developers who know ASP.NET can leverage their existing knowledge of C# and can quickly pick up the framework differences introduced in ASP.NET Core. ASP.NET is an open source, server-side web application framework created by Microsoft that runs on Windows and was started in the early 2000s. ASP.NET allows developers to create web applications, web services, and dynamic content-driven websites.

How to use Testcontainers with .NET Unit Tests

On the opposite side of the testing spectrum, working with a dependency instance, such as a database, can give us a higher sense of confidence. Remember, developers are testing on top of complex systems, and the behaviors of those systems can change subtly over time. Working with the “real” dependency allows us to catch these issues early in the development lifecycle. By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. What type of database to use is an important decision when developing a web application.

ASP.NET applications can use all of the popular databases, including Microsoft SQL Server, MySQL, MariaDB, Postgres, MongoDB and CouchDB. While Microsoft SQL Server can require expensive software licenses for complex deployments, the free Express version is suitable for the vast majority of websites. In addition to an IDE, websites require web application server software and a hosting server. Most ASP.NET applications use Microsoft IIS (Internet Information Server). IIS is available for all versions of Microsoft Windows at no additional cost. Windows hosting servers are usually more expensive than comparable Linux servers, which are commonly used to run PHP, JavaScript and Ruby applications.

Make your web pages more readable:

Interpreted languages would not identify this error until the code is actually run and tested. In a large application, it is very time consuming to manually test every scenario, or to write and maintain additional code that tests of every scenario, whenever code is changed. In the world of web and application development, there are many frameworks and languages that developers can choose from. The framework I will be discussing in this blog post is ASP.NET and ASP.NET Core. You can find growth rates of ASP.NET compared to all other server-side programming languages in our ASP.NET market report. Testcontainers is an amazingly robust library that helps all developers increase their confidence in their delivered solutions.