add test (doctest)

tests/adc_valueholder_test.cpp

@@ -0,0 +1,44 @@
+#include <iostream>
+// #include <doctest/doctest.h>
+
+#include "../common/adc_value_holder.h"
+
+// TEST_CASE("[ADC VALUEHOLDER]")
+// {
+//     int ch_i = 10;
+
+//     auto getter = [&ch_i]() { return ch_i; };
+//     auto setter = [&ch_i](const int& v) { ch_i = v; };
+//     auto validator = [&ch_i](const int& v) {
+//         if (v < 0)
+//             return false;
+//          else
+//             return true;
+//     };
+
+//     adc::AdcValueHolder vh(getter, setter, validator);
+// }
+
+
+int main()
+{
+    int ch_i = 10;
+
+    auto getter = [&ch_i]() { return ch_i; };
+    auto setter = [&ch_i](const int& v) { ch_i = v; };
+    auto validator = [&ch_i](const int& v) {
+        if (v < 0)
+            return false;
+        else
+            return true;
+    };
+
+    // adc::AdcValueHolder vh(getter, setter, validator);
+    adc::AdcValueHolder vh(getter, setter, adc::AdcValueHolder::_defaultTrivialConvTypes, validator);
+
+    vh = 77;
+
+    std::cout << "(vh = 77) => ch_i = " << ch_i << "\n";
+
+    std::cout << (double)vh << "\n";
+}