adds some wchar_t proptests (#29)

tests/proptests/main_rapidcheck.cpp

@@ -84,8 +84,14 @@ template <> struct Arbitrary<tyti::vdf::object>
 };
 } // namespace rc
 
+bool containsSurrogate(const std::wstring &str)
+{
+    return str.find(wchar_t(-1)) != str.npos;
+}
+
 int main()
 {
+
     ////////////////////////////////////////////////////////////////
     // object parsing tests
 
@@ -130,6 +136,49 @@ int main()
             RC_ASSERT(obj.name == to_test.name);
         });
 
+    success &= rc::check(
+        "serializing and then parsing just the name with default options "
+        "should return the original name - wchar_t",
+        []()
+        {
+            vdf::wobject obj;
+            obj.name = *rc::gen::suchThat(rc::gen::string<std::wstring>(),
+                                          [](const auto &str)
+                                          { return !containsSurrogate(str); });
+
+            std::wstringstream sstr;
+            vdf::write(sstr, obj);
+
+            auto to_test = vdf::read(sstr);
+            RC_ASSERT(obj.name == to_test.name);
+        });
+
+    success &= rc::check(
+        "serializing and then parsing just the name with default options "
+        "should return the original name - not escaped - wchar_t",
+        []()
+        {
+            vdf::wobject obj;
+            obj.name =
+                *rc::gen::suchThat(rc::gen::string<std::wstring>(),
+                                   [](const std::wstring &str) {
+                                       return str.find(L"\"") == str.npos &&
+                                              !containsSurrogate(str);
+                                   });
+
+            vdf::WriteOptions writeOpts;
+            writeOpts.escape_symbols = false;
+
+            vdf::Options readOpts;
+            readOpts.strip_escape_symbols = false;
+
+            std::wstringstream sstr;
+            vdf::write(sstr, obj, writeOpts);
+
+            auto to_test = vdf::read(sstr, readOpts);
+            RC_ASSERT(obj.name == to_test.name);
+        });
+
     success &= rc::check(
         "check if the attributes are also written and parsed correctly",
         [](const vdf::object &in)