Test definition: the purpose of program testing is to implement the process of the program to find an error. Test tasks and purposes can be expressed as follows.<br>Objective: to find an error in the program.<br>Task: run the program on the computer and find the program's hidden error.<br>Another term associated with the prediction is called debug. The purpose and task can be specified as follows:<br>Purpose: find and modify an error.<br>Tasks: eliminates software failure and ensures reliable operation of the program. The relationship between test and error correction can be explained in the data flow diagram of figure 6-1. From the diagram, each test in the system can prepare some test data and be sent to the computer along with the tested program to execute the command. Typically, the test data required to run the program is called "test case". Each test case generates the corresponding "test result". However, if the test result does not match the expected result, that is, if the program has an error, it is necessary to find and modify it.<br>
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