Equivalence Classes in software testing

Question

I am new to Software testing and I am studying the basic techniques. I read the following problem:

Identify the Equivalence Classes for the following specification: The program accepts five to nine inputs which are 3 digit integers greater than 100.

I think that it doesn't matter how much inputs this program has, and the equivalence class is {99,100,101}. Am I right or not?

After the comments, I think the classes are:

1.(-00,99)
2.[100]
3.(101,999)
4.(1000,+00)

score 1 · Accepted Answer · answered May 21 '13 at 07:22

1

Inputs:

0-4 inputs
5-9 inputs
More than 9 inputs

Values:

0-100
101-999
Greater than 999

The program accepts when there are between 5 and 9 inputs and each input value is a 3-digit number between 101 and 999.

answered May 21 '13 at 07:22

jspcal

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I think that depending on the context, for example if the input is through command line arguments, there would exist other invalid classes such as "non integer numbers" and "alphanumeric inputs" – David Lopez May 07 '21 at 21:16

score 1 · Answer 2 · edited Jan 17 '15 at 09:17

1

equivalence classes for your problem are:

set of numbers that are not three digit and greater than hundred...
set of numbers that are less than one hundred
set of numbers that are greater than one hundred and less than 999
set consisting of the number 100

edited Jan 17 '15 at 09:17

Lunchbox

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answered May 21 '13 at 07:26

Jai

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the first class that you mentioned isn't the same with the second?@ – Avraam Mavridis May 21 '13 at 07:36

Ron Sher · Answer 3 · 2013-05-21T09:28:11.313

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I suggest you use PICT for generating effective combinations to test. Take a look at http://msdn.microsoft.com/en-us/magazine/ee819137.aspx The tool can be downloaded from http://download.microsoft.com/download/f/5/5/f55484df-8494-48fa-8dbd-8c6f76cc014b/pict33.msi

You can look for similar tools at http://pairwise.org/tools.asp

edited May 21 '13 at 09:28

answered May 21 '13 at 09:02

Ron Sher

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Interesting tool, I will try it – Avraam Mavridis May 21 '13 at 10:45

score 0 · Answer 4 · answered Jul 14 '15 at 07:16

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1 0<x<100 , value of x should contain 0-4
2 101<x<999 , value of x should contain 5-9
3 X>999 , value of x should be 0-9

answered Jul 14 '15 at 07:16

user3610612

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score -1 · Answer 5 · answered Jul 10 '15 at 10:00

Following should be the classes: Inputs: [0 - 4] invalid class [5 - 9] valid class [More than 9] invalid class

Values: [Less than 99] invalid class [100 to 999] valid class [Greater than 1000] invalid class

Again a Decision table should be used to find out the valid combination of Inputs and Values.

Equivalence Classes in software testing

5 Answers5