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Domain Testing: Divide and Conquer - Testing Education

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Appendix A: Equivalence Class Analysis Heuristics (continued)<br />

Heuristic 6: Look for variable groups that must calculate to a certain value or range<br />

� Consider ‘i1’ <strong>and</strong> ‘i2’ are input variables to a function <strong>and</strong> o is the output<br />

variable such that the value of ‘o’ can lie only in the range of v1 <strong>and</strong> v2. In<br />

such cases you would test the output variable ‘o’ in terms of the input<br />

variables.<br />

Analysis:<br />

Step 1: Represent this variable as a mathematical range expression.<br />

v1

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