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Project Applications that are Easy to Test

In order to create quality software it is very important to test it qualitatively. But testing can be quite challenging, if your project does not provide special facilities to facilitate testing. I want to talk about it more detail in this article. 

Unit Testing

Unit testing allows you to control the quality of software at all stages of development, you can avoid a lot of mistakes in the early stages of development, even when it is impossible to test the code outside.

If you want to use unit testing in your project think about how you are going to do it at the projection stage. First you need to develop core applications and write-through tests that will verify its performance.

When the kernel is ready and the first tests have worked, you can add new components. The first step is to determine how the new code should work, what will be the input and output data. Then write acceptance tests for the new component. Acceptance tests verify performance component as a whole. Initially, they will not work and even compile. Start to implement the functionality needed step by step until all the tests will not work.

At each step of the development write unit tests before you implement any functionality. If suddenly after changes in the code a few tests stopped working, then do not proceed with the following changes until repaired tests.

You should test the interactions of components with each other with the help of integration tests.

If your code is difficult to test with the unit test that means that there are too many dependencies and no convenient interfaces. Such a code would be difficult to maintain in the future, so you need to refactor.

Interfaces For Automated Testing

Testing the program manually is a fairly laborious process, especially when it is necessary to perform the same action for different sets of input data. With this approach, it is easy to miss something and not notice, especially it’s hard to find regressions.

Then automated tests come to the aid. There are many frameworks to automate tests. But they are good mainly just to test the GUI. Using it to test the basic functionality, data processing algorithms rather costly and inconvenient, because changes in the GUI pull in changes in all the tests, and writing such tests is difficult. In such cases it is necessary to separate the testing of the functionality from the GUI. This can be done using the console commands or command line arguments.

If you have a small project and the program performs one or more acts on it, it is possible that you will only restrict the command line. The input of the program will receive a file with input data and produce output of the output stream, such as a file. For large projects with diverse functionality you can add the parser of console commands. Each team will be meant to test individual components or behaviors. The tester can easily automate the tests, run the program using a script with different sets of input data and comparing the result with the desired.


Assertions are validation of issuing an error message in debug mode. Use assertions to validate the input data and return values. Normally assertions should never be deployed. The most common cases where you need to add assertion are validation code, check for NULL or empty value, unintended meaning to switch.

Discuss all of the Points with a Software Tester

The most important thing is to discuss whatever you do with the tester. Together decide how the program should work to avoid any ambiguity. Think about how to test your application before you start writing code. Testing tools should initially be built into the architecture. Discuss what tools is necessary to implement. Do not be lazy to do it, then the tester will work more efficiently, and the product will be of higher quality.

Wish a successful development.