software_carpentary2
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software_carpentary2 [2011/06/20 03:45] medhamsh |
software_carpentary2 [2018/03/24 11:13] |
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| - | ====== Quality Assurance ====== | ||
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| - | The more you invest in quality, the less time it takes to develop working software.\\ | ||
| - | Quality is not just testing\\ | ||
| - | Trying to improve the quality of software by doing more testing is like trying to lose weight by weighing yourself more often. (Steve McConnell)\\ | ||
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| - | Quality is: | ||
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| - | * Designed in | ||
| - | * Monitored and maintained through the whole software life cycle | ||
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| - | This lecture looks at basic things every developer can do to maintain quality. | ||
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| - | ===== Limits to Testing ===== | ||
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| - | * Suppose you have a function that compares two 7-digit phone numbers, and returns True if the first is greater than the second | ||
| - | * 1072 possible inputs | ||
| - | * At ten million tests per second, that's 155 days | ||
| - | * If they're 7-character alphabetic strings, it's 254 years | ||
| - | o Then you move on to the second function... | ||
| - | * And how do you know that your tests are correct? | ||
| - | * All a test can do is show that there may be a bug | ||
software_carpentary2.txt ยท Last modified: 2018/03/24 11:13 (external edit)
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