classdef Scope_test < IMDDTestCase
    methods (Test, TestTags = {'unit', 'fast', 'receive', 'scope'})
        function quantizeMapsRealSignalToExpectedGrid(testCase)
            scope = makeScope(10, 10, 2, 0, true);
            xin = (0:9).';

            quantized = scope.quantize(xin);

            expected = [0; 0; 8/3; 8/3; 16/3; 16/3; 16/3; 8; 8; 8];
            testCase.verifyEqual(quantized, expected, "AbsTol", 1e-12);
        end

        function process_ResamplesQuantizesAndSubtractsDc(testCase)
            scope = makeScope(40, 20, 3, 0, true);
            xin = (1:40).';

            yout = scope.process_(xin);

            expected = scope.quantize(resample(xin, scope.fadc, scope.fsimu));
            expected = expected - mean(expected, 1);

            testCase.verifyEqual(length(yout), 20);
            testCase.verifyEqual(yout, expected, "AbsTol", 1e-12);
            testCase.verifyEqual(mean(yout), 0, "AbsTol", 1e-12);
        end

        function processWithoutDcBlockingPreservesQuantizedMean(testCase)
            scope = makeScope(40, 20, 3, 0, false);
            xin = (1:40).';

            yout = scope.process_(xin);

            expected = scope.quantize(resample(xin, scope.fadc, scope.fsimu));

            testCase.verifyEqual(yout, expected, "AbsTol", 1e-12);
            testCase.verifyGreaterThan(abs(mean(yout)), 1e-12);
        end
    end
end

function scope = makeScope(fsimu, fadc, adcresolution, quantbuffer, block_dc)
    scope = Scope( ...
        "fsimu", fsimu, ...
        "fadc", fadc, ...
        "adcresolution", adcresolution, ...
        "quantbuffer", quantbuffer, ...
        "block_dc", block_dc, ...
        "H_lpf", struct('fs', fadc));
end