App Testing Services: Possibilities to Reuse Tests
The existing tests can be changed during the following three kinds of computer programming activities:
- Creation of new tests.
- Execution of tests.
- Modification of the code.
Since each test contains input data, output data and the path, these components may undergo a change in any combination. When changing the input of the current test, let us assume that the old test ceases to exist, and a new test is created. Thus, the allowed changes to the test include all sorts of amendments to the output or the test paths. It is impossible to make any alterations to the output without changing the path and / or the input data. Consequently, it is allowed to make 2 types of changes to the test: change in the path or change in path and output data.
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In accordance with the above arguments we can highlight the four levels of test reusability, deletion, or modification).
Level 1: The test cannot be re-used. It is necessary to create a new set of tests.
Level 2: Only test inputs can be re-used. In many cases, the purpose of testing consists in activating some of the program’s elements to be covered. If the path of the current test shows that the elements of the program to be covered are utilized before the commands are changed, the test input may be reused to cover these elements. As a result of these changes the new path and the test output of the program and / or the terms of reference document may differ from the results of a previous test run. Thus, the first level tests should be run again to obtain new data and output paths. Quality assurance team is capable of coping with any task on identification and elimination of any software problems.
Level 3: The re-use of both input and output test data is possible. It is clear that at this level functional tests are usually conducted. If only the code of the module is changed while maintaining the old functionality, it is possible to reuse the existing functional tests to verify the proper implementation. Since the path may change, and the output – be affected by the code changes, such tests should be run again, but it is expected to obtain identical results.
Level 4: The highest level of re-use involves reusing the input data, output data and the test path. In this case, any operator does not change in the test path. Consequently, there is no need to rerun these tests, since the output data and the path will remain unchanged.
Software testing services focus on executing all kinds of tests that will lead to detecting functional defects or errors.