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Comparison Testing can help test engineers to understand strength and weakness of the software product with others. The approach of comparison testing involves comparing files and folders concurrently.

In this tutorial, you will learn-

What is Comparison Testing

Comparison testing involves comparing the contents of databases, files, folders, etc.

A comparison testing can be carried out in two ways

  • Direct comparison testing: It is a testing of particular parts of each site against each other. Usually, multiple sites are compared side by side.
  • Objective comparison testing: Execute the same test for each site separately. Usually, one site at a time is tested.

The below image shows how two files are compared with the help of comparison tool, and showcase various features that tool offers like merge options, in pane editing, show rendered html, etc. to use it as per the requirement.

Comparison Testing

Comparison testing can be done in following ways:

  • Competitors current site against your current site
  • Competitors current version against the older version
  • Yours current version against the older version

Tools for Comparison Testing

Various comparison Tools for comparison testing includes,

  • Ultracompare

    Besides comparing file and folders, ultracompare has the capability to merge the differences between the compared files. With Ultracompare, even zip files and jar archives can also be compared.

  • WinMerge

    It is a cross-platform comparison tool used for both Windows and Linux. It can compare both folders and files.

  • DiffDoc

    It compares files of all types like word, PDF, txt, rtf, html, xml, etc. It can run text and comma delimited reports.

  • Windiff

    Windiff tool highlights each difference between files and folders with a different color. It is a freeware available for both (32 bit and 64 bit)

Best practices for Comparison Testing

  • Test engineers should ensure before comparison testing that product under test does not have a pattern overload
  • Verify whether the pattern complies with standard set for the test
  • Check for the patterns current relevance and completeness
  • Define different roles and duties of each of the component of the system and its sub-system
  • Check whether your code is compatible with other code (can be a part of another code)

Benefits of comparison Testing

  • One can easily detect the underlying weakness and strengths of the software
  • It helps to realize the design structure of competing products as well as allows you to use them as a benchmark for future enhancements and improvements


  • Comparison testing can help test engineers to understand software product strength and weakness with others.
  • Comparison testing involves comparing the contents of databases, files, etc. against actual results.
  • It helps you realize the design structure of competing products




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