classdef Informationsignal_test < IMDDTestCase
    methods (Test, TestTags = {'unit', 'fast', 'signals', 'informationsignal'})
        function constructorWithoutOptionsUsesSignalDefaults(testCase)
            info = Informationsignal([0; 1; 1; 0]);

            testCase.verifyClass(info, 'Informationsignal');
            testCase.verifyEqual(info.signal, [0; 1; 1; 0]);
            testCase.verifyEmpty(info.fs);
            testCase.verifyEmpty(info.logbook);
        end

        function constructorWithOptionsCopiesFsAndLogbook(testCase)
            seed = Signal(5, "fs", 2);
            seed = seed.logbookentry("seed entry", seed);

            info = Informationsignal([1; 0; 1], "fs", 32e9, "logbook", seed.logbook);

            testCase.verifyEqual(info.signal, [1; 0; 1]);
            testCase.verifyEqual(info.fs, 32e9);
            testCase.verifyEqual(info.logbook, seed.logbook);
        end

        function inheritedArithmeticKeepsInformationsignalTypeAndMetadata(testCase)
            lhs = Informationsignal([1; 2; 3], "fs", 64e9, "logbook", table());
            rhs = Informationsignal([4; 5; 6], "fs", 1, "logbook", table());

            sumSig = lhs + rhs;

            testCase.verifyClass(sumSig, 'Informationsignal');
            testCase.verifyEqual(sumSig.signal, [5; 7; 9]);
            testCase.verifyEqual(sumSig.fs, lhs.fs);
            testCase.verifyEqual(sumSig.logbook, lhs.logbook);
        end

        function electricalsignalCastUsesRequestedFsAndLogbook(testCase)
            seed = Signal(1, "fs", 4);
            seed = seed.logbookentry("cast logbook", seed);
            info = Informationsignal([0; 1; 0; 1]);

            elec = info.Electricalsignal("fs", 128e9, "logbook", seed.logbook);

            testCase.verifyClass(elec, 'Electricalsignal');
            testCase.verifyEqual(elec.signal, info.signal);
            testCase.verifyEqual(elec.fs, 128e9);
            testCase.verifyEqual(elec.logbook, seed.logbook);
        end

        function opticalsignalCastFailsForInformationsignal(testCase)
            info = Informationsignal([0; 1; 0; 1]);

            didError = false;
            try
                info.Opticalsignal( ...
                    "fs", 64e9, ...
                    "logbook", info.logbook, ...
                    "lambda", 1310e-9, ...
                    "nase", 0, ...
                    "polrot", 0);
            catch ME
                didError = true;
                testCase.verifySubstring(ME.message, ...
                    "Cannot convert from information- to opticalsignal.");
            end

            testCase.verifyTrue(didError, ...
                "Informationsignal -> Opticalsignal should reject direct conversion.");
        end

        function electricalToInformationCastPreservesSignalAndMetadata(testCase)
            seed = Signal(2, "fs", 8);
            seed = seed.logbookentry("from electrical", seed);
            elec = Electricalsignal([3; 1; 4], "fs", 96e9, "logbook", seed.logbook);

            info = elec.Informationsignal("fs", elec.fs, "logbook", elec.logbook);

            testCase.verifyClass(info, 'Informationsignal');
            testCase.verifyEqual(info.signal, elec.signal);
            testCase.verifyEqual(info.fs, elec.fs);
            testCase.verifyEqual(info.logbook, elec.logbook);
        end
    end
end