The test case design technique or methods or approaches that need to be followed by every test engineer while writing the test cases to achieve the maximum test coverage. If we follow the test case design technique, then it became process-oriented rather than person-oriented.
The test case design technique ensures that all the possible values that are both positive and negative are required for the testing purposes. In software testing, we have three different test case design techniques which are as follows:
- Error Guessing
- Equivalence Partitioning
- Boundary Value Analysis[BVA]
Error guessing is a technique in which there is no specific method for identifying the error. It is based on the experience of the test analyst, where the tester uses the experience to guess the problematic areas of the software. It is a type of black box testing technique which does not have any defined structure to find the error.
In this approach, every test engineer will derive the values or inputs based on their understanding or assumption of the requirements, and we do not follow any kind of rules to perform error guessing technique.
The accomplishment of the error guessing technique is dependent on the ability and product knowledge of the tester because a good test engineer knows where the bugs are most likely to be, which helps to save lots of time.
Advantages and disadvantage of Error guessing technique
Advantages
The benefits of error guessing technique are as follows:
- It is a good approach to find the challenging parts of the software.
- It is beneficial when we will use this technique with the grouping of other formal testing techniques.
- It is used to enhance the formal test design techniques.
- With the help of this technique, we can disclose those bugs which were probably identified over extensive testing; therefore, the test engineer can save lots of time and effort.
Disadvantage
Following are the drawbacks of error guessing technique:
- The error guessing technique is person-oriented rather than process-oriented because it depends on the person’s thinking.
- If we use this technique, we may not achieve the minimum test coverage.
- With the help of this, we may not cover all the input or boundary values.
- With this, we cannot give the surety of the product quality.
- The Error guessing technique can be done by those people who have product knowledge; it cannot be done by those who are new to the product.