How to unit test with verifyError?

Hi everyone,

I am trying to unit test the following function:

function res=add5(x) % ADD5 Increment input by 5. 
if ~isa(x,'numeric') 
 error('add5:InputMustBeNumeric','Input must be numeric.') 
end 
res=x+5; 
end

I run the unit test with the following function:

function testadd5(testCase) 
actSolution=add5('c'); 
verifyError(testCase,actSolution,'add5:InputMustBeNumeric') 
end

As a test result I get the following message:

Verification failed in getBbgFieldDataTest/testadd5.

   Error occurred in getBbgFieldDataTest/testadd5 and it did not run to completion.

    ---------
    Error ID:
    ---------
    'add5:InputMustBeNumeric'

    --------------
    Error Details:
    --------------
    Error using add5 (line 4)
    Input must be numeric.

    Error in getBbgFieldDataTest>testadd5 (line 67)
    actSolution=add5('c');
I would appreciate your support. Thank you in advance.

Answer 1

[Sean de Wolski]

verifyError(testCase, @()add5('c'), 'add5:InputMustBeNumeric')

Pass the function handle into verifyError rather than a result. Verify Error will then call the function itself.

[Ashley Trowell]

Thanks a bunch!