function testresult = xydegN2ab_test()
% XYDEGN2AB_TEST  One line description goes here
%  
% More detailed description of the test goes here.
%
%
%   See also 

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%% Version <http://svnbook.red-bean.com/en/1.5/svn.advanced.props.special.keywords.html>
% Created: 26 Oct 2010
% Created with Matlab version: 7.10.0.499 (R2010a)

% $Id$
% $Date$
% $Author$
% $Revision$
% $HeadURL$
% $Keywords: $

MTestCategory.Unit;

[x y] = deal(0); % arbitrary (x,y) point
degNs = 0:45:360; % 9 angles all around the circle

[a b] = deal(NaN(size(degNs))); % pre-allocate a and b

% calculate all a's and b's
for idegN = 1:length(degNs)
    degN = degNs(idegN);
    [a(idegN) b(idegN)] = xydegN2ab(x, y, degN);
end

result = false(size(degNs)); % pre-allocate result
for idegN = 1:4
    % define id for opposite angles
    id = idegN:4:length(degNs);
    % check whether a and b are equal for all opposite angles
    resulta(id) = isscalar(nanunique(a(idegN:4:end)));
    resultb(id) = isscalar(nanunique(b(idegN:4:end)));
end

testresult = all([resulta resultb]);