4.5.1 Error guessing
Error guessing is a technique that should always be used as a complement to more formal techniques. The success of error guessing is very much gdier den endent on the skill of the tester, as good testers know where the defects are likely to lurk Some people seem to be naturally good at testing and others are prod testers because they have a lot of experience either as a tester or working with a particular system and so are able to pi point its an error guessing approach, used after more formal techniques have nwhy been applied to some extent, can be In using more formal tech niques, the is likely to gain a better understanding of the system what it does and how it works. With this better understanding, he or she is likely to be Beamer a guessing ways in which the system may not work properly. There are no rules for ercor guessing. The tester is encouraged to think of in which the sofeware may not be able to cope. Typical conditions to indude division by zero, blank (or no) input, empty files and the wrong kind of teg alphabetic characters where numeric are required). If anyone ever says of a system or the environment in which it is to operate That could never happens it might be a good idea to test that condition, as such assumptions anour what will and will not happen in the live environment are often the cause of Sailiares A structured approach to the error-guessing technique is to list pos- sible defects or failiares and to design tests that attempt to produce them. Thesc defecr and failiere less can be built based on the tester's own experience or that of other perplic asailable defecLand failure data, and from common knowledge about why software fails.
4.5.1 Error guessing Error guessing is a technique that should always be used as a complement to more formal techniques. The success of error guessing is very much gdier den endent on the skill of the tester, as good testers know where the defects are likely to lurk Some people seem to be naturally good at testing and others are prod testers because they have a lot of experience either as a tester or working with a particular system and so are able to pi point its an error guessing approach, used after more formal techniques have nwhy been applied to some extent, can be In using more formal tech niques, the is likely to gain a better understanding of the system what it does and how it works. With this better understanding, he or she is likely to be Beamer a guessing ways in which the system may not work properly. There are no rules for ercor guessing. The tester is encouraged to think of in which the sofeware may not be able to cope. Typical conditions to indude division by zero, blank (or no) input, empty files and the wrong kind of teg alphabetic characters where numeric are required). If anyone ever says of a system or the environment in which it is to operate That could never happens it might be a good idea to test that condition, as such assumptions anour what will and will not happen in the live environment are often the cause of Sailiares A structured approach to the error-guessing technique is to list pos- sible defects or failiares and to design tests that attempt to produce them. Thesc defecr and failiere less can be built based on the tester's own experience or that of other perplic asailable defecLand failure data, and from common knowledge about why software fails.
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