Answer Posted / rajendra prasad reddy penumall

Test-Cases for the calculator

so here we have 12 buttons total
ie 0,1,2,3,4,5,6,7,8,9,ADD,Equalto -12 buttons
here u can press atleat 4 buttons at a time minimum
for example
0+1=
for zero u should press 'zero' labled button
for plus u should press '+' labled button
for one u should press 'one' labled button
for equalto u should press 'equalto' labled button
0+1=
here + and = positions will not vary
so first number position can be varied from 0 to 9 i.e
from permutation and combinations u can fill that space in
10 ways
in the same way
second number position can be varied from 0 to 9 i.e
from permutation and combinations u can fill that space in
10 ways

Total number of possibilities are =10x10=100
This is exhaustive testing methodology and this is not
possible in all cases.
In mathematics we have one policy that the the function
satisfies the starting and ending values of a range
then it can satisfy for entire range of values from
starting to ending.

then we check the starting conditions i.e
one test case for '0+0='
(expected values you know thatis '0')
then another testcase for '9+9='
(expected values you know thatis '18')

only two testcases are enough to test the calculator
functionality.


if you still have any doubt feel free to mail me at :
rajendra_penumalli@yahoo.com
or call me:9885162742(hyd)

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