Which developer would not agree? In particular, if the application – whether web, client, mobile or server software – becomes larger, more complex and more comprehensive, continuous tests are indispensable. Possible errors can be avoided by clever software testing, and a faster error search is supported by the implementation of tests. Therefore, parallel to software development should also be thought of testing. We show you what tests you should consider.
Also, the customer should the software developer question with which this approaches their own software testing. The following questions assist the customer and the software developer in questioning the procedure:
- Are continuous tests carried out?
- Does the developer test before handing over?
- Are there own testers in the company?
Software Testing: Where should I start testing?
At the beginning, everyone is asking themselves the question of where to begin to integrate the first tests into the work. There are different approaches that everyone must try for themselves. A common denominator would be a first analysis, which parts of the source code or the entire software would be well suited for a first test run. Simple checks on variables or results of method calls should be easy to cope with.
In four steps, a possible procedure is explained how software can be tested by means of a test. At the same time, testing begins with the individual components of the source code and actually ends with the transfer of the software to the customer.
Software testing in four building test categories
When testing software or source code, four basic test categories can be distinguished: unit test, integration test, system test and acceptance test. These categories are systematically structured and should also be applied accordingly in software development.
Software Testing: Unit Testing
Our journey begins with the first step: the unit test or the component test. In this case, smaller components, so-called “units”, of the source code or modules of software are tested. The developer writes test methods for his own source code to test these individual units. So you test the functionality in certain parts of the software, but mostly individual methods.
- Detailed testing of individual components is possible
- Quick troubleshooting for further development / changes in the source code
- Fast checks during development
- Good separation of source code and test code
- Reusability of tests to simplify testing
- More advanced approach
Software Testing: Test the interfaces of your software
After extensive unit tests, we are on our way to a higher software quality with the integration tests. In comparison to the unit test, the individual component is no longer tested, but the dependency between individual components. Interfaces and results of complete workflows form the test focus and should test the cooperation between the involved components. Thus, errors in the transfer of values or possible thinking errors in the process sequence can also be detected.
- Dependencies can be tested
- Defined sequences can be “played”
- Interaction between individual components is checked
- Team communication improves through testing
Software Testing: Are all functions integrated?
In the next (test) stage of professional software development, after unit and integration tests, the system test follows. This level of testing the software testing checks the software on all of the requirements (for example, from the specification). In a defined test environment, the system test is performed to test all functional and non-functional requirements. Functional requirements determine the specific functions or the tasks of software, whereby non-functional requirements can be, for example, reliability, user-friendliness or maintainability. Non-functional requirements are more difficult to consider than functional requirements.
- Good preparation for acceptance of the software
- Documented the functionality of the software according to certain specifications
Software Testing: acceptance test & delivery at the customer
In the end, the customer himself tests the delivered software. Most of the time, this test is intuitive because most of the customers want to go through the software before paying the bill. This means that the customer wants to make sure that what he ordered has been delivered.
In this test level, the customer already checks the software (mostly) with real data from the company. Here it can be said that even in the previous tests should be tested with real data or at least – in the ideal presentation – very realistic data.
- At the same time, successful completion of the software is also a legally effective takeover of the software
- Provided that all the test phases described above have been positively completed, this test is also carried out positively
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