Working with TOSCA

23 07 2012

For the past few months, I have been working on a new paradigm to Automation, with a “Model Based” tool from Tricentis – TOSCA. Overall, it is quite a different experience in using it. It does not contain any code, and builds from the requirements as a model of what the actual application will contain. The catch being that initially you do not need to define your test cases from the application end and things might not even be in sequence of what the actual final application would look like.

I have an analogy for this – a human body is composed of head, body, hands and legs. Each one has its own “attributes”, which in turn have “instances”. This is what is called the ‘Model-based approach’. Each hand will have attributes such as fingers, nails, elbow, fore-hand, wrist, etc. Then, all these attributes will have instances – long fingers, short fingers, thick fingers, etc. Now to build a body, you need to join all these “attributes” into a seamless body with the various parts working in tandem. This is what a test case would look like in TOSCA. With the initial parts of the body being the Test Case Design part. The joining together of the parts being the test case and the final infusion of blood being the execution and reporting [have not used Frankenstein here, as TOSCA tends to create a human rather than it’s alternate :-)]

TOSCA takes its roots in Object Oriented Modelling, employing concepts such as separation of concerns and encapsulation. In TOSCA, you can create classes, attributes and instances (objects). This modular breakdown makes the understanding and management of the actual requirements fairly simple; without going into how the final system under test would look like. I find this a very cool thing; although it took me some time to understand the concept in relation to the current bombardment of the existing Test Frameworks and Tools.

Again, the interface has a very intuitive design, which can be modelled according to the needs and quirks of the person working with it. People might argue here, that it is the same with Eclipse and other such tools like MS Visual Studio Test Professional, but the concept is totally different with TOSCA. You have the drag & drop capabilities, combined with a good integration across all the functionality provided from putting in the requirements to the final reporting; all in a single interface and tool, with support from a dedicated and technical team to get over the initial hiccups of using it.

The next good part, I found, was its capability to extend its technology adaptors (adaptors are used to automate tests against systems developed in various technologies, such as HTML, Java, .NET, Mainframe, Web Services, etc.) using the ubiquitous and simple VBScript and VBA; which is prevalent as the development language of choice in the Testing Community. I found this quite interesting, as we can now easily use TOSCA with almost any system, which we can code to make the underlying adaptor understand. For example, we had a hybrid mainframe green screen application to test (a rich Java GUI with an embedded mainframe emulator), which after a week’s work was ready to be tested with TOSCA; I have not come across such quick development cycles with other tools I worked with/on. That said, TOSCA has the capability to extend itself to different backend databases with the ease of just creating a simple module for it and using that module throughout your test cases to create a connection and then run your customized SQL queries.

If you start from the Requirement Definitions part, you can easily put in your current requirements and provide a measure of weight-age for each.

Then comes the part where you can extremely easily define the actions you can do on the objects which form your test cases. TOSCA by default defines 6 such actions – Do Nothing, Input, Output, Buffer, Verify and WaitOn, which take care of how a particular attribute defined earlier in the Test Design is taken action on.

More on this coming up soon…

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