Boundary Value Analysis - (Testing Techniques)

Boundary Value Analysis (BVA) is a black-box testing technique used for identifying errors at the boundaries of input values. In this tutorial, we'll discuss how to use BVA to improve the effectiveness of your testing.

Syntax

There is no specific syntax for using BVA in testing. However, the general approach is as follows:

1. Identify input values for testing.
2. Identify boundary values for each input value.
3. Test the application using boundary values and observe results.

Example

Suppose you are testing a web application that accepts a user's age as input. The application should only allow ages between 18 and 65 years. To test this input field using BVA, you would use the following values:

• Test values below 18 (e.g. 0, -1, 17)
• Test the boundary value of 18
• Test values over 65 (e.g. 66, 100, 200)
• Test the boundary value of 65

By testing these values, you can identify any issues with the input validation logic of the application.

Explanation

BVA is a testing technique used to find faults/errors at input boundaries of an application. It focuses on testing values at the edges of input domains, such as the minimum and maximum allowable values. By testing these values, you can identify any issues with the input validation logic of the application.

Use

BVA is particularly useful when testing input fields that have specific constraints, such as age, weight, height, and other numerical or date fields. It is also useful for testing fields with high security implications, such as passwords and social security numbers.

Important Points

Here are some important points to keep in mind when using BVA for testing:

• BVA should be used in combination with other testing techniques to ensure thorough test coverage.
• Test input values both within and outside the boundary values.
• Be aware of possible implementation errors that may affect the accuracy of the testing results.
• Identify the most critical inputs and test those first.

Summary

In this tutorial, we discussed Boundary Value Analysis, a black-box testing technique used for identifying errors at the boundaries of input values. We covered the syntax, example, explanation, use, and important points of using BVA to improve the effectiveness of testing. By using BVA, you can test the main input values to ensure that the application behaves correctly and does not produce unexpected outcomes.