Test for one of multiple exceptions in Matlab unittests

Question

I am using Matlab's unittest to test the handling of invalid parameters.

In the test I have a line

t.verifyError(@myObject.myMethod, 'MATLAB:nonStrucReference');

which works fine in Matlab R2014a, but fails in Matlab R2016a with the message

--------------------- Framework Diagnostic: --------------------- verifyError failed. --> The function threw the wrong exception. Actual Exception: 'MATLAB:structRefFromNonStruct' Expected Exception: 'MATLAB:nonStrucReference'

I wonder if it would be possible to test whether one of the exceptions is thrown.

I know that it would be possible to write

t.verifyError(@myObject.myMethod, ?MException);

but something more specific would be better.

Suever · Accepted Answer · 2016-07-13 12:40:17Z

You would likely want to write a custom verification method which accepts a cell array of exceptions as the input.

function verifyOneOfErrors(testcase, func, identifiers, varargin) % Ensure that a cell array was passed rather than a string if ischar(identifiers) identifiers = {identifiers}; end % If the function succeeds with no errors, then we want a failure threw_correct_error = false; try func() catch ME % Check if the identifier is in our list of approved identifiers threw_correct_error = ismember(ME.identifier, identifiers); end % Do the actual verification testcase.verifyTrue(threw_correct_error, varargin{:}) end

Another alternative is to actually get the error message identifier dynamically within your testcase by explicitly causing the error, and retrieving the identifier.

% Get a version-specific identifier for this specific error try; a = []; a.field; catch ME; end; % Verify that your method throws this error t.verifyError(@myObject.myMethod, ME.identifier)

Collectives™ on Stack Overflow

Test for one of multiple exceptions in Matlab unittests

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related