# What is Loop Testing(Methodology, Example)?

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Loop Testing is a kind of software testing that focuses exclusively on the correctness of loop constructions. It is a component of Control Structure Testing (path testing, data validation testing, condition testing).

Loop testing is an example of white-box testing. This approach is used to test software loops.

## Types of Loop Tests

The following are some examples of loop tests −

• Simple loop

• Nested loop

• Concatenated loop

• Unstructured loop

## Why Loop Testing?

Following are some of the reasons why loop testing is performed −

• Testing can help to resolve loop recurrence concerns.

• Loop testing can indicate constraints in efficiency and operations.

• The loop's uninitialized variables can be identified by testing loops.

• It aids in the identification of loop initiation issues.

## How to do Loop Testing − Complete Methodology?

It must be tested at three separate stages within the testing loop −

• When the loop is activated.

• When the loop is executed.

• When the loop is terminated.

The following is the testing technique for all of these loops −

### Simple Loop

The following is how a simple loop is tested −

• Ignore the entire loop.

• Make a single pass across the loop.

• Make a number of passes through the loop where a<b, n is the maximum limit of passes.

• Make b, b-1; b+1 passes through the loop, where "b" is the highest amount of passes through the loop allowed.

### Nested Loop

You must perform the following steps to create a nested loop −

• Adjust all the other loops to their smallest value and begin with the innermost loop.

• Initiate a simple loop test on the innermost loop and keep the outside loops at their smallest iteration parameter value.

• Conduct the test for the following loop and make your way outwards.

• Keep testing till the outermost loop is reached.

## Concatenated Loops

If two loops in a chained loop are free of one other, they are checked as simple loops; otherwise, they are tested as nested loops.

However, if the loop counter for one loop is utilized as the starting value for the others, the loops are no longer considered separate.

### Unstructured Loops

For unstructured loops, the architecture must be restructured to represent the use of structured programming techniques.

## Limitation in Loop testing

• Loop issues are especially common in low-level applications.

• The flaws discovered during loop testing are not significant.

• Numerous defects may be identified by the operating system, resulting in storage boundary breaches, identifiable pointer failures, and so on.

## Summary

• Loop testing is a type of White Box testing in software engineering. This approach is used to evaluate loops in the program.

• Loop testing can indicate constraints in functionality and operations.

• Loop issues are especially common in low-level applications.

Updated on 09-Jun-2021 12:49:22