Definition Tests

The tests are carried out on the interface of the software, and is completely indifferent internal behavior and the structure of the program. Black box test cases intended to to demonstrate that: the software functions are operational. The input accepts properly. There is a correct output, and maintains the integrity of the external information. Do the black box test answers questions:? What input cases end up defining good test cases. If the system is sensitive to certain forms of input.

Which volumes (levels of data) tolerates system. 2. Carrying out of tests. Different tests to be performed are based on testing at different levels, it is necessary to test if each unit operates, then it is necessary to test whether the various components fit together and finally it is necessary to test the system globally. This process is quite logical, since if for example only the system is tested, it would be difficult to find certain types of errors. 2.1.

Basic principles of evidence. They must be carried out by anyone other than the designers of programs, so you can verify as well as the proper functioning of the program your correct conception and interpretation. (3) In addition to following these 10 principles: 1. the test can be used to show the presence of errors, but never of his absence. 2. The main difficulty of the test process is deciding when to stop. 3. Avoid unplanned tests cases, not reusable and trivial unless the program is really simple. 4. A necessary part of a test case is the definition of the expected result. 5. The test cases must be written not only for valid and expected entry conditions but also for not valid or unexpected conditions. 6. The test cases must be written to generate the desired output conditions. 7. The number of errors without discovering is directly proportional to the number of errors discovered.

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