classdef PlotlyTestCaseAnyColorString < PlotlyTestCaseAny

% PlotlyTestCaseAnyColorString Matcher for RGB/RGBA color strings

%

% This class validates that a value is a color string in the format:

% - "rgb(r,g,b)" where r,g,b are integers from 0 to 255

% - "rgba(r,g,b,a)" where r,g,b are 0-255 and a is a float from 0 to 1

%

% Do not instantiate this class directly. Use PlotlyTestCase.AnyColorString() instead.

%

% Example:

% expected.color = PlotlyTestCase.AnyColorString();

% testCase.verifyEqualStructs(actual, expected);

methods

function result = match(~, actualValue)

% match Check if value is a valid RGB/RGBA color string

%

% Validates format: "rgb(r,g,b)" or "rgba(r,g,b,a)"

% where r,g,b are integers 0-255 and a is float 0-1

result = struct('passed', false, 'diagnostic', '');

% Check if it's a string

if ~(ischar(actualValue) || isstring(actualValue))

result.diagnostic = sprintf('Expected color string, got %s', class(actualValue));

return;

end

actualValue = char(actualValue);

% Try to match rgb(r,g,b) pattern

rgbPattern = '^rgb\((\d+),(\d+),(\d+)\)$';

tokens = regexp(actualValue, rgbPattern, 'tokens');

if ~isempty(tokens)

r = str2double(tokens{1}{1});

g = str2double(tokens{1}{2});

b = str2double(tokens{1}{3});

if r >= 0 && r <= 255 && g >= 0 && g <= 255 && b >= 0 && b <= 255

result.passed = true;

return;

else

result.diagnostic = sprintf('RGB values must be 0-255, got rgb(%d,%d,%d)', r, g, b);

return;

end

end

% Try to match rgba(r,g,b,a) pattern

rgbaPattern = '^rgba\((\d+),(\d+),(\d+),([\d.]+)\)$';

tokens = regexp(actualValue, rgbaPattern, 'tokens');

if ~isempty(tokens)

r = str2double(tokens{1}{1});

g = str2double(tokens{1}{2});

b = str2double(tokens{1}{3});

a = str2double(tokens{1}{4});

if r >= 0 && r <= 255 && g >= 0 && g <= 255 && b >= 0 && b <= 255

if a >= 0 && a <= 1

result.passed = true;

return;

else

result.diagnostic = sprintf('Alpha value must be 0-1, got rgba(%d,%d,%d,%f)', r, g, b, a);

return;

end

else

result.diagnostic = sprintf('RGB values must be 0-255, got rgba(%d,%d,%d,%f)', r, g, b, a);

return;

end

end

% Didn't match either pattern

result.diagnostic = sprintf('Invalid color format: "%s". Expected "rgb(r,g,b)" or "rgba(r,g,b,a)"', actualValue);

end

end