Decision Table Testing

Today blog is about Decision Table Testing. “Decision table testing is a testing technique used to test system behavior for different input combinations” and known as cause and effect table. The table consist of rules, cases, and test conditions. This tutorial has a good and easy to understand example. It created a decision table for a login screen where the output is true if both conditions, username and password are true else the output would be false. There were four rules because there were two variables. There was also another example that was similar which had eight cases because there were three variables. The test would only pass if and only if three of the conditions were true else it would return an error message. This test method is important because it allows us to test several combinations of tests which allows us to have more coverage of on the tests. There are many advantages of decision table testing:

  1. “When system behavior is different for different input and not the same for a range of inputs”
  2. It provides better coverage for testing because it has many combinations.
  3. Any complex conditions can be converted into a decision table.
  4. Great for low input combinations, will cover all testes.

But there is one big problem with decision table testing and that is when there are many inputs the table gets complex and complicate things. This article was very helpful to me. Because I have a better understanding of decision table testing now. This tutorial had many good examples and even a video on decision table testing. The formula for possible combinations is 2 ^ n, where n is the number of inputs which is shown in this article which I remember during class. I think after reading this article I change the way I think about decision table testing because I now know what it’s best used for. I found this article very interesting because of the clever examples that it uses its. All in all, the decision table testing is one of many important testing methods out there.

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