How to write an equivalence classes

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How to write an equivalence classes

how to write an equivalence classes

Suppose you choose a test with both an invalid User Name and an invalid Sex. Testers not familiar with equivalence classes might test this UI with just four pairs of hardcoded values: Using equivalence class testing with random values, we validate different input every day, increasing our odds of finding bugs.

The day I wrote this article I found a UI bug that had been in the product for several months. If they had chosen a random value from an EC, the test would have eventually found this bug.

When an equivalence class is a range, we should create tests at the high and low edge of the range, and just outside the range. Your EC tests should choose a random number between 1 and The size of your variable is a type of EC class as well!

This could lead to other bugs such as exceeding the max length of a string, or trying to shove a long number into an int. When defining your ECs, the first place to look is the Feature Specification Document or whatever your Agile equivalent may be.

The other place is in the product code. But how do you know the source code was correct? Another technique for creating ECs is to is to break up the output into equivalence classes.

Then choose inputs that give you an output from each class. In this article, I used the word Sex 15 times.GRE Text Completion & Sentence Equivalence (Manhattan Prep GRE Strategy Guides) [Manhattan Prep] on *FREE* shipping on qualifying offers.

how to write an equivalence classes

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What is Equivalence partitioning in Software testing?

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Equivalence Class Testing This week we turn to equivalence class testing. Equivalence class testing is a black box software testing technique that divides function variable ranges into classes/subsets that are .

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Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for. Equivalence partitioning (EP) is a specification-based or black-box technique. It can be applied at any level of testing and is often a good technique to use first.

How to implement equivalence class in Java? - Stack Overflow