Matlab: Improper index matrix reference (or outsmarting matlab)

Question

I want to be able to write jasmine-like tests in Matlab. So something like

expect(myfibonacci(0)).toBe(0);
expect(myfibonacci(5)).toBe(15);
expect(myfibonacci(10         


        

Answer 1

Here's an examplary implementation with an overloaded subsref method. It could also be done with only one class I guess, but that would make the subsref-overloading even uglier.

classdef Tester < handle
    methods
        function obj = Tester()
        end

        function [varargout] = subsref(this,S)

            if S(1).type(1) =='('
                tv = TestValue(S(1).subs{:});
            end

            if numel(S) > 1
                try
                    [varargout{1:nargout}] = builtin('subsref', tv, S(2:end));
                catch me
                    me.throwAsCaller();
                end
            else
                varargout{1} = tv;
            end

        end
    end
end

And

classdef TestValue 
    properties (Hidden)
        value;
    end
    methods
        function this = TestValue(value)
            this.value = value;
        end

        function toBe(this, v)
            assert( isequal(this.value, v) );
        end
    end
end

Results in:

>> expect(1).toBe(1)
>> expect(1).toBe(2)
Error using TestValue/toBe (line 13)
Assertion failed.