Add serialization unit tests for extreme integer values

test/src/unit-serialization.cpp

@@ -189,3 +189,20 @@ TEST_CASE("serialization")
         test("[3,\"false\",false]", "[3,\\\"false\\\",false]");
     }
 }
+
+TEST_CASE_TEMPLATE("serialization for extreme integer values", T, int32_t, uint32_t, int64_t, uint64_t)
+{
+    SECTION("minimum")
+    {
+        constexpr auto minimum = (std::numeric_limits<T>::min)();
+        json j = minimum;
+        CHECK(j.dump() == std::to_string(minimum));
+    }
+
+    SECTION("maximum")
+    {
+        constexpr auto maximum = (std::numeric_limits<T>::max)();
+        json j = maximum;
+        CHECK(j.dump() == std::to_string(maximum));
+    }
+}