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.test

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

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.