init

tests/utils/HelpfulAssert.h

@@ -0,0 +1,43 @@
+//
+// Created by Stepan Usatiuk on 13.04.2023.
+//
+
+#ifndef SEMBACKUP_HELPFULASSERT_H
+#define SEMBACKUP_HELPFULASSERT_H
+
+#include <functional>
+#include <iostream>
+#include <ostream>
+#include <sstream>
+#include <utility>
+
+#include "../../src/Exception.h"
+
+template<typename T, typename comp = std::equal_to<>>
+class HelpfulAssert {
+public:
+    bool operator()(const T &lhs, const T &rhs) {
+        if (!comp()(lhs, rhs)) {
+            std::stringstream out;
+            if constexpr (has_print_op<T>::value) {
+                out << "Expected lhs to compare to " << rhs << std::endl;
+                out << "But lhs is " << lhs << std::endl;
+
+            } else {
+                out << "Error comparing!" << std::endl;
+            }
+            throw Exception(out.str());
+        }
+        return true;
+    }
+
+private:
+    template<typename, typename = void>
+    struct has_print_op : std::false_type {};
+
+    template<typename E>
+    struct has_print_op<E, std::void_t<decltype(std::declval<std::ostream>() << std::declval<E>())>> : std::true_type {};
+};
+
+
+#endif//SEMBACKUP_HELPFULASSERT_H